technocal specification of group-b

8/10/2019 Technocal Specification of Group-B

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TECHNICAL SPECIFICATION T.N. NO.:NESCO/MATERIALS(L&S)/18 , DTD.27.5.13

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SECTION - IV

TECHNICAL SPECIFICATIONOF

ELECTRICAL MATERIALS

( Cross arm, Clamp, GI Pin, H/W fittings, Stay Sets, Stay wire,

Insulators, Earthing device, Coil earth, Bolts, Nuts & Washer, Kit

kat fuse, T.C fuse wire, Al. socket , AB Cable accessories, Dangerboard, Barbed wire, Channel & Angle )

GROUP B Details of require Materials:

Sl No Item Description Unit Quantity

1 11 KV V Cross Arm (GI) No 500

2 Back Clamp for 11 kv V (GI) No 1813

3 11 kv F Clamp (GI) No 554

4 11 kv G I Pin No 2169

5 LT GI Pin No 214

6 T & C Hard ware Fittings set 3124

7 18 mm G I HT Stay Set 1214

8 16mm GI L.T. Stay Set 374

9 7/8 G I Stay Wire Kg 727

10 7/10 G I Stay Wire Kg 8806

11 7/12 G.I. Stay Wire Kg 704


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12 M S Clamp for Stay set(HT) Pair 579

13 MS clamp for stay set (LT) No 60

14 40 mm 2.5M long G I Perfortd Pipe Earthing Device No 1030

15 Earthing Coil No 200

16 3ph 4 w LT cross Arm No. 67

17 Back clamp for LT cross Arm No. 58

18 LT straps bolt & Nut pair 22

19 16 mm GI Bolt & Nuts with Washer Kg

i) M16x75 Nuts & Bolts (GI) Kg 1700

ii) M16x100 Nuts & Bolts (GI) Kg 1900

iii) M16x125 Nuts & Bolts (GI) Kg 2943

iv) M16x150 Nuts & Bolts (GI) Kg 2650

v) M16x175 Nuts & Bolts (GI) Kg 1800

vi) M16x200MS Nuts & Bolts(GI) Kg 1650

vii) M16 GI Washer Kg 50

20 100 Amp. Kitkat Fuse No. 200



23 10 Amp TC fuse wire Kg 400

24 63 Amp TC fuse wire Kg 500

25 No - 6 G I Wire Kg 2700

26 No - 8 G I Wire Kg 1500

27 Al. Cable Socket

i) 70 mm 1200


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ii) 120 mm 1400

iii) 150 mm 1100

iv) 185 mm 1233

28 Piercing Connector No. 400

29 Neutral connector No 300

30 Suspension Clamp No 545

31 Dead End Clamp No 272

32 Poe Clamp with Eye Hook No 50

33 Danger Notice Board 3179 Nos.

i) LT Danger Notice Board No 879

ii) 11KV Danger Notice Board No 1500

iii) 33KV Danger Notice Board No 800

34 Barbed wire Kg 10400

35 100x50x6 mm MS Chanel Kg 18000

36 75x40x6 mm MS Channel Kg 20000

37 50x50x6 mm MS Angle Kg 10000

NB: 1. Bidders should put their authorized signature with office seal on each page of

the documents.

2. Bidders should put their offer in the Guaranteed particulars column furnished

in the tender documents.

3. Purchaser may ask to the bidder who will qualify in Techno- Commercial

evaluation of the tenders for submission of Samples for verification , ifrequired.

4. Purchaser reserves the right to increase or decrease the above quantities

during placement of purchase order or may cancel any item/items withoutassigninganyreason thereof.

Dy. General Manager (Purchase & Store)NESCO, Balasore, Odisha


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TECHNICAL SPECIFICATION

1) 11 KV V Cross Arm (GI) :

The Cross arm is to be made out of ISMC 75x40 with 50mmx6mm flat packing on top & bottomflange of the channel where the insulator pin is to be mounted conforming to REC construction standard

& drawing . Galvanized the V cross arm as per IS-2633/1972.(Latest Amendment) , IS :2629/1985 (1st

.Revision).

Guaranteed Technical Particulars of 11KV 'V' Cross Arm

Sl.No. Description Specified Bidders Offer

1 Type of Cross Arm ISMC 75x40

2 Channel Weight 7.14 Kg/mtr

3 Grade of Steel FY 250

4 Steel Standard IS:2062-1992

5 Fabrication Standard IS:802 (part - 2) - 1978

6 Dimension (75x40x4.8)mm

7Size of M S Flat welded at bothends

50x8mm

8 Steel Tensile Strength 1500kgf/cm

9 Working Load 200/300/350/400Kg

10 Total Weight (with tolerance permeter + 4%)

11.2 Kg (approx.)

2) Back Clamp for 11 KV V Cross arm (G.I) :Back clamp for 11 KVV cross arm made out of 50x8 mm MS Flat & galvanize as per IS-2633/1972.

(Latest Amendment) , suitable for 9mx300 Kg PSC poles confirming to REC Construction Standard &drawing enclosed.


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3) 11 KV F Clamp/ Pole top Bracket (GI) :11 KV line pole top bracket made out of 50x8 mm M.S Flat & galvanize as per IS-2633/1972.(Latest

Amendment) , confirming to REC Construction Standard.A-7 & drawing .

GUARANTEED TECHNICAL PARTICULARS FOR 11KV POLE TOP BRACKET

Sl.No. Constructional Features Specified Bidders

Offer

1. Material used 50x8 mm MS Flat

2. Overall height 385 mm

3. Flange Width (one welded &

one bent)

60 mm

4. Spacing between two flanges 75mm

5. Spacing of 2 nos of 18mm holes

for fixing on pole top

100mm

6. C/L Distance of 2nos of 22mm

holes on top flanges of the

bracket

25mm from edge

of the flange

7. ISS 2062

8. Drawing enclosed

4) 11 KV GI Pin ) :11 KV hot-dipped galvanizing Pin suitable for 11 KV pin insulator , confirming to REC Construction

Standard. C- 1 and confirming to IS: 2486/Part-I/1971 & Part-II/1989, IS: 1363/1984, IS: 3063/1972,IS:2633/1972.

GUARANTEED TECHNICAL PARTICULARS FOR 11KV G.I PIN


1 Manufacturer Name & Address To be specified by

Bidder

2 Type of Pin 11KV

3 Applicable International Standard IS:2486 (part-II)

4 Grade Steel HDG Steel

5 Steel Specification HDG Steel

6 Specification of Bolt & Nut As per ISS


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7 Specification of Bolt Threads As per ISS

8 Mechanical falling load (MFL) 10 KN

9 Elongation at MFL As per ISS

10 Maximum deflection of Pin Top at

MFL

1.5 mm

11 Galvanising Specification IS- 2633

12 Minimum weight of Steel deposited

on steel surface

610 g/m

13 Pin Length 315 mm

14 Shank Length 150 mm

15 Stalk Length 165 mm

16 Type of Thread As per ISS

17 Thread Length As per ISS

18 Drawing enclosed

5) LT GI Pin ) :LT hot-dipped galvanizing Pin suitable for LT pin insulator , confirming to REC Construction Standard.D-2 and confirming to IS: 2486/Part-I/1971 & Part-II/1989, IS: 1363/1984, IS: 3063/1972, IS:2633/1972.

GUARANTEED TECHNICAL PARTICULARS FOR 11KV G.I PIN


1 Manufacturer Name & Address To be specified by

Bidder

2 Type of Pin LT

3 Applicable International Standard IS:2486 (part-II)

4 Grade Steel HDG Steel

5 Steel Specification HDG Steel

6 Specification of Bolt & Nut As per ISS

7 Specification of Bolt Threads As per ISS

8 Mechanical falling load (MFL) 10 KN

9 Elongation at MFL As per ISS

10 Maximum deflection of Pin Top atMFL

1.5 mm

11 Galvanising Specification IS- 2633

12 Minimum weight of Steel depositedon steel surface

610 g/m


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13 Pin Length 260 mm

14 Shank Length 125 mm

15 Stalk Length 135 mm

16 Type of Thread As per ISS

17 Thread Length As per ISS

18 Drawing enclosed

6) 11KV H.W fittings (T&C Type) :The hardware fittings for T & C Strain Disc Insulator. For use in 11 KV Overhead power lines shall

comply IS:2486 (Part-I) 1971 and 2486 (Part-II) /1974 and IS:2486 (Part-III) 1974 IS:12048 /1987 andREC Specification 24/84 or the latest revision thereof. All Forging and Casting shall be good finish andfree from flows and other defects. The edges on the outside of fittings such as at the Eye, Cleaves and

Holes shall be rounded.

All parts of different fittings, which provide for Inter-connection shall be made such that sufficientclearance is provided at the Connection Point to ensure free movement & suspension of the Insulatorstring Assembly.All eye and cleaves shall be free in this manner but care shall be taken that too much

clearance between Eye & Tongs of the cleaves is avoided.

All ferrous fittings and parts other than those of Stainless steel shall be hot dip galvanized as per ISS:

2633 / 1964.Small fittings like Spring washer , Nuts etc. may be Electro-galvanized as per

IS-6745 / 72.The threads of nuts and topped holes when cut after Galvanizing shall be well cited &grassed.

The Hardware fittings ( Tongue & Clevis type) shall be suitable for fixing on 75 mm x 40mm Channel Cross Arm an accommodation 34mm/55mm/100mm Conductors.

The set shall comply of the following components :-

(i) Cross arms straps (Dead & Straps) with Bolt (16mm) Nut and Spring Washer.

(ii) Two Nos. forged cotter pints and spring washer to suit the tongue and the clevics.

(iii) Formed helical fittings should be of suitable materials i.e all alloy aluminum steel

suitable for 34mm/55mm/100mm ACSR/AAAC.(iv) Strain clamps shall be suitable for the above ACSR conductor or AAAC. The

ultimate strength of the clamp should not be less than 3000 Kg and slipping

strength shall not be less than 90% of this figure. The clamp should be malleablecast iron/All alloy A-6.

Tests :String insulator fittings shall comply with the following tests as per IS: 2486 (Part.I)

Type Tests:

a) Visual examination test

ii) Verification of dimensionsiii) Slip strength test

iv) Mechanical test


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v) Electrical resistance testvi) Heating cycle testvii) Galvanising test.

Acceptance/ Routine Test :

i)Verification of dimensionsii) Mechanical test

iii) Galvanising test

iv) Vidual examination test

v) Routine mechanical test.

GUARANTEED TECHNICAL PARTICULARS FOR 11 KV H/WFITTINGS ( T&C )


1. Manufacturer Name &Address

To be specified by Bidder

2. Standard Specification to

which Hard ware Fittingsshall confirm.

IS: 2486 (Part-I,II &IV)

3 Ultimate strength 3000 Kg (min)

4. Dimensions in accordancewith

IS: 2486(Part-II)

5 Type of washer thickness

a) Spring 2.5 mm

b)Flat 2.5 mm

6. Type of Clamp size Tension Clamp suitable forSquiral/Weasel/ Rabbit

7. Galvanised conform to IS 2633 , IS: 4759-1996& IS: 6747

8. Weight of Fittings To be specified by the Bidder

9. Tolerance in dimension ifany

+5%

10. Manufacturer trade mark to be

embossed on the sets

Specified by the Bidder

11. Specific drawing to beenclosed.

Enclosed


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7) 18mm HT GI Stay Set :

8) 16mm LT Stay Set:

TECHNICAL SPECIFICATION OF

LT AND HT STAY SET

1. SCOPEThis specification covers design, manufacture, testing and dispatch of GI Say Sets of1 6 mm and 18 mm GI Stay Sets .

2. 0 GENERAL REQUIREMENTS

2.1 16 mm dia Stay sets (Galvanized) LT Stay Set

This stay sets (Line Guy set) will consist of the following components:-

2.1.1 Anchor Rod with one washer and Nut

Overall length of rod should be 1800 mm to be made out of 16 mm dia GS Rod,

one end threaded up to 40 mm length with a pitch of 5 threads per cm and

provided with one square GS washer of size 40X40x1.6mm and one GS

hexagonal nut conforming to IS:1367:1967 & IS:1363:1967. Both waster and nut

to suit threded rod of 16 mm dia. The other end of the rod to be made into a roundeye having an inner dia of 40mm with best quality welding.

2.1.2 Anchor Plate Size 200 x 200 x6 mm

To be made out of GS plate of 6 mm thickness. The anchor plate should have atits centre 18 mm dia hole.

2.1.3 Turn Buckle & Eye Bolt with 2 Nuts

To be made of 16 mm dia GS Rod having an overall length of 450mm, one end of

the rod to be threaded up to 300 mm length with a pitch of 5 threads per cm andprovided with two GS Hexagonal nuts of suitable size conforming toIS:1363:1967& IS:1367:1967. The other end of rod shall be rounded into a circular eye of40mm inner dia with proper and good quality welding.

2.1.4 Bow with Welded Angle

To be made out of 16mm dia GS rod. The finished bow shall have an over all

length of 995 mm and eight of 450 mm, the apex or top of the bow shall be bent atan angle of 10 R. The other end shall be welded with proper and good quality

welding to a GS angle 180 mm long having a dimension of 50x50x6mm. The

angle shall have 3 holes of 18 mm dia each.


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2.1.5 Thimble

To be made on 1.5 mm thick GS sheet into a size of 75x22x40mm and shape asper standard shall be supplied.

Average Weight of Finished 16mm Stay Sets shall be at least 7.702 KG

(Minimum) (Excluding Nuts Thimbles and Washer) 8.445 Kg. (Maximum)

2.2 18 mm dia. Stay sets (Galvanized) HT Stay Set

This stay sets (Line Guy set) will consist of the following components:-

2.2.1 Anchor Rod with one washer and Nut

Overall length of rod should be 1800 mm to be made out of 18 mm dia GS Rod,

one end threaded up to 40 mm length with a pitch of threads per cm and

provided with one square GS washer of size 50X50x1.6mm and one GShexagonal nut conforming to IS:1367:1967 & IS:1363:1967. Both waster and nut

to suit threded rod of 18 mm dia. The other end of the rod to be made into a round

eye having an inner dia of 40mm with best quality welding.

2.2.2 Anchor Plate Size 300 x 300 x8 mm

To be made out of GS plate of 8 mm thickness. The anchor plate should have at

its centre 20 mm dia hole.

2.2.3 Turn Buckle & Eye Bolt with 2 Nuts

To be made of 18 mm dia GS Rod having an overall length of 450mm, one end of

the rod to be threaded up to 300 mm length with a pitch of 5 threads per cm andprovided with two GS Hexagonal nuts of suitable size conforming toIS:1363:1967& IS:1367:1967. The other end of rod shall be rounded into a circular eye of40mm inner dia with proper and good quality welding.

2.2.4 Bow with Welded Channel

To be made out of 18 mm dia GS rod. The finished bow shall have an over alllength of 995 mm and eight of 450 mm, the apex or top of the bow shall be bent at

an angle of 10 R. The other end shall be welded with proper and good quality

welding to a GS angle 200 mm long having a dimension of 100x50x4.7mm.The channel shall have 2 holes of 18 mm dia and 20 mm dia hole at its centre as perdrawing enclosed.

2.2.5 Thimble

To be made on 1.5 mm thick GS sheet into a size of 75x22x40mm and shape asper standard shall be supplied.


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3. Galvanizing

The complete assembly shall be hot dip galvanized as per ISS.

4. Welding

The minimum strength of welding provided on various components of 16mmand 18 mm dia stay set shall be 3100 kg & 4900 Kg respectively. Minimum 6mmfilet weld or its equivalent weld area should be deposited in all positions of the job

i.e. at any point of the weld length. The welding shall be conforming to

relevant IS:823/1964 or its latest amendment.

5. Threading

The threads on the Anchor Rods, Eye Bolts and Nuts shall be as per specification IS;4218:1967 (ISO Metric Screw Threads). The Nuts shall be conforming to the

requirements of IS: 1367:1967 and have dimension as per IS 1363:1967. The

mechanical property requirement of fasteners shall confirm to the properly clause

4.6 each for anchor rods and Eye bolt and property clause 4 for nuts as per IS:1367:1967.

6. TESTS

The contractor shall be required to conduct testing of materials at

Govt./Recognized testing laboratory during pre-dispatch inspection for Tensile

Load of 3100 Kg / 4900 Kg applied for one minute on the welding and maintainedfor one minute for 16 mm and 18 mm dia stay sets respectively .

7. IDENTIFICATION MARKAll stay sets should carry the identification mark of the Purchaser

NESCO as applicable. This should be engraved on the body of stay rods toensure proper identification of the materials.

The nuts should be of a size compatible with threaded portion of rods and thereshould be not play or slippage of nuts.

Welding wherever required should be perfect and should not give way after

erection.

8. TOLERANCES

The tolerances for various components of the stay sets are indicated below

subject to the condition that the average weight of finished stay sets of 16mm dia

excluding nuts, thimbles and washers shall not be less than the weight specifiedabove:-


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GURANTEED TECHNICAL PARTICULARS OF LT /HT STAY SETS

Sl

No.

Item

Description

Specified Parameters

Material Type of StaySets

Bidders

offerSectionTolerances

FabricationTolerances

1. Anchor

Plate

6mm thick

+2.5%-5%

200x200mm+1% GS Plate 6

mm thick

LT Stay Set

8 mm thick

+2.5%-5%

300x300mm+1% GS Plate 8

mm thick

HT Stay Set

2. AnchorRod

16mm dia

+5%- 3%

Length 1800mm +

0.5%

GS Round16mm dia

LT Stay SetRounded Eye 40

mm inside dia +3%Threading 40mm+

11%-5%

GS Round

16mm dia

18 mm dia

+5%- 3%

Length 1800mm +

0.5%

GS Round18mm dia HT Stay Set

Rounded Eye 40

mm inside dia +3%

Threading 40mm+

11%-5%

GS Round18mm dia

3. Turn BuckleBow

16mm dia+5%-3%

995mm+1% GS Round

16mm dia. LT Stay Set

Length180mm +1% GS Angle50x50x6 mm

18mm dia

+5%-3%995mm+1% GS Round

18mm dia. HT Stay Set

Length200mm +1% GS Channel

100x50x4.7mm

4. Eye Bolt

Rod

16mm dia

+5%-3%

Length 450mm +

1%

GS Round

16 mm dia

LT Stay Set

Threading 300mm+1% Round Eye40mm inside

dia+3%18 mm dia

+5%-3%

Length 450mm +

1%

GS Round

18 mm dia HT Stay Set

Threading 300mm

+1% Round Eye

40mm inside

dia+3%


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5 Galvanisatio

n thickness

All galvanization shall be carried out in accordance with IS: 2629 . The weight of Zinc

deposited shall be in accordance with IS: 2629 and shall not less than 0.61 kg/m with aminimum thickness of 86 microns for items of thickness more than 5 mm, 0.46kg/m(64

microns) for items of thickness between 2 mm & 5 mm& 0.33kg/m(47 microns) foritems less than 2 mm thickness.

a Anchor

Plate

b Anchor

Rodc TurnBuckle

Bow

d Eye Bolt

Rod

6 Thimble 2 nos. to be made of 1.5 mm thick G.S Sheet into a size 75x22x40 mm & shape as perstandard.

7 One G.S Hexagonal Nut confirming to IS:1363 & 1367 with one square washer of size50x50x6 mm (G.S) along with Anchor Rod.

8 Two G.S Hexagonal Nuts of suitable size along with Eye Bolt Rod.

9) 7/8 GI Stay Wire :



TECHNICAL SPECIFICATIONS 7/8 SWG , 7/10 SWG and 7/12 SWG

STAY WIRE)

1. Application Standards

Except when they conflict with the specific requirements of this specification, theG.I Stay Stranded Wires shall comply with the specific requirements of IS: 2141-

1979. IS: 4826-1979 & IS: 6594-1974 or the latest versions thereof.

2. Application and Sizesa) The G.I. stranded wires covered in this Specification are intended for use on the

overhead power line poles, distribution transformer structures etc.b) The G.I stranded wires shall be of 7/8 SWG ( 7/4.0 mm for 33 KV lines),

7/12 SWG( 7/3.15 mm for 11KV lines) and 7/12 SWG (7/2.5 mm for LT lines)

standard sizes.

3. Materials


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The wires shall be drawn from steel made by the open hearth basic oxygen or electricfurnace process and of such quality that when drawn to the size of wire specified andcoated with zinc, the finished strand and the individual wires shall be of uniformquality and have the properties and characteristics as specified in this specification.

The wires shall not contain sulphur and phosphorus exceeding0.060% each.3.1 Tensile Grade

The wires shall be of tensile grade 4, having minimum tensile strength of 700

N/mm conforming to 1S:2141.

3.2 General Requirements

a) The outer wire of strands shall have a right-hand lay.b) The lay length of wire strands shall be 12 to 19 times the strand diameter.

3.3 Minimum Breaking Load & Galvanising

The minimum breaking load of the wires before and after stranding shall be as

follows:

No. of Wires& Const.

Wire Dia(mm)

Min. breakingload of the

Single wire

before

stranding (KN)

Min. breaking load

of the standard

wire (KN)

7 (6/1) 2.5 3.44 21.40

7 (6/1) 3.15 5.46 34.00

7 (6/1) 4.0 8.80 54.90

Minimumweight of

zinc coating

beforestranding

490 gm/mm2 490 gm/mm2 490 gm/mm2

Minimumweight of

zinc coatingbefore

stranding

475 gm/mm2 475 gm/mm2 475 gm/mm2

4. Constructiona) The galvanized stay wire shall be of 7-wire construction. The wires shall be so

stranded together that when an evenly distributed pull is applied at the ends ofcompleted strand, each wire shall take an equal share of the pull.


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b) Joints are permitted in the individual wires during stranding but such jointsshall not be less than 15 metres apart in the finished strands.

c) The wire shall be circular and free from scale, irregularities, imperfection,

flaws, splits and other defects.5. Tolerances

A tolerance of (+) 2.5% on the diameter of wires before stranding shall be

permitted.

6. Sampling Criteria

The sampling criteria shall be in accordance with IS :2141.

7. Tests on Wires before Manufacture

i) The wires shall be subjected to the following tests in accordance with IS :2141.a) Ductility Test

b) Tolerance on Wire Diameter

ii) Tests on Completed Strand

The completed strand shall be tested for the following tests in accordance with

IS:2141.a) Tensile and Elongation Test: The percentage elongation of the

stranded wire shall not be less than 6%.

b) Chemical analysisc) Galvanizing Test

The Zinc Coating shall conform to "Heavy Coating" as laid down in 1S:4826

8. Marking

Each coil shall carry a metallic tag, securely attached to the inner part of the coilbearing the following information:

a) Manufacturers name or trade markb) Lot number and coil number

c) Size

d) Constructione) Tensile Designationf) Lay

g) Coating h)

Length

i) Mass

j) ISI certification mark, if any9. Packing

The wires shall be supplied in 75-100 Kg. coils. The packing should be done in

accordance with the provisions of IS:6594.


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GURANTEED TECHNICAL PARTICULARS STAY WIRE (7/8 SWG)

Sl.

No.

Description Specified Bidders

offer

1. Manufacturers name & address To be specified bythe Bidder

2 Nominal diameter of wire in mm 4.0

3 Tolerance in diameter in mm + 2.5%

4 Minimum breaking load in Kg 5960.26

5 Tensile strength Kgf/mm 71.40

6 Overall diameter of stranded wire in mm 12.0

7 Sectional Area (in mm.) 113.14

8 Coating Test

a Type of zinc coating whether heavy or light Heavy

b Weight of coating in g/m 476

9 a Length of wire in each coil in mtr. 117

b Tolerance + 5%

10 No. of dips the coating is able to withstand

as 18 20C

3 dip in min.

11 Adhesion Test (Wrap Test at 1 turn persecond coiling while stress not exceeding

% nominal tensile strength)

a Min. complete turn of wrap To be specified bybidder

b Dia of mandrel on which wrapped - do -

12 Bend Testa Angle - do -

b Dia round a format to be bent - do -

13 Freedom from defect - do -

14 Chemical composition the MS Wire used

shall not exceed

a Sulphur 0.060% - do -

b Phosphorous 0.065% - do -

15 a Weight of each coil in Kg 70 to 100

b Tolerance + 5%

16 a Weight of wire in Kg/Km 750b Tolerance + 5%

17 Standard according to which the solid wire is manufactured

and tested

ISS: 2141/1992 &

ISS: 4826/1979


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GURANTEED TECHNICAL PARTICULARS STAY WIRE (7/12 SWG)

Sl.

No.

Description Specified Bidders

offer

1. Manufacturers name & address To be specified bythe Bidder

2 Nominal diameter of wire in mm 2.50


4 Minimum breaking load in Kg 2331.07

5 Tensile strength Kgf/mm 71.40

6 Overall diameter of stranded wire in mm 7.50

7 Sectional Area (in mm.) 44.19

8 Coating Test

a Type of zinc coating whether heavy or light Heavy

b Weight of coating in g/m 4769 a Length of wire in each coil in mtr. 298

b Tolerance + 5%

10 No. of dips the coating is able to withstand

as 18 20C

3 dip in min.

11 Adhesion Test (Wrap Test at 1 turn per

second coiling while stress not exceeding

% nominal tensile strength)

a Min. complete turn of wrap To be specified bybidder

b Dia of mandrel on which wrapped - do -

12 Bend Testa Angle - do -

b Dia round a format to be bent - do -

13 Freedom from defect - do -

14 Chemical composition the MS Wire usedshall not exceed

a Sulphur 0.060% - do -

b Phosphorous 0.065% - do -

15 a Weight of each coil in Kg 70 to 100

b Tolerance + 5%

16 a Weight of wire in Kg/Km 310b Tolerance + 5%

17 Standard according to which the solid wire is manufactured

and tested

ISS: 2141/1992 &

ISS: 4826/1979


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12) MS Clamp for HT Stay set :

HT stay clamp suitable for PSC poles made out of 50x8 mm MS Flat with two coat of red-oxide primer ,

confirming to REC Construction Standard & drawing enclosed.

13) MS Clamp for LT Stay set :

LT stay clamp suitable for PSC poles made out of 50x6 mm MS Flat with two coat of red-oxide primer ,

confirming to REC Construction Standard & drawing enclosed.

14) 40mm dia GI Earthing Device:

Technical Specifications

1. Scope :-

This specification provides for design, manufacturing, testing before dispatch, supply &delivery of Earthing Device (Heavy Duty) (for use in Sub-station earthing).

2. APPLICABLE STANDARDS :-

The Earthing Device must be made out of 40 mm nominal Bore & 3.2 mm (MediumGauge- No minus Tolerance allowed) wall thickness Hot Dip G.I. Pipe (as per IS ;- 1239,mPart-1, 1990 & REC construction Standard J-2) , ISI marked of reputed Make & 2.5 mtrslength tapered finished smooth at one end for a length of 75 mm

& Clamp at the other end.

Staggered drills hole of 12 mm Dia of interval of 150mm shall be made before galvanization.

The GI Earthing Clamp/ Strip (C- Clamp Type) is to be of 50mm width, 6mm thickness &flange length of 65 mm in each side. This should be suitable for termination of 4 nos of GIFlat earth electrodes. The Clamp/ Strip & Earthing pipe after fabrication will be hot dip

galvanized confirming to IS: 2629/85 with latest amendments. The clamp shall have two holesin both sides suitable for 5/8 x 2 Bolt & provided with two GI bolts& Nuts in each side of

5/8 x 2 long half threaded with spring washer as per IS: 3043/1982.The galvanization tests

are to be conducted as per IS: 2633/72 & IS: 6745/72 &its latest amendments.


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Guaranteed Technical Particulars of Earthing Device(To be submitted along with Offer)

Part

Bidders Offer1. Location of Factory or Place of Manufacture

2. Makers Name, Address & Country

3. Size of

a Pipe

b Earthing Strips

4. Length

5. Thickness of Pipe

6. Galvanization Process

7. Galvanization thickness

a For Earthing device

b For Connecting Flat

8. Galavanization tests to be conducted as per ISS

9. Any other Particulars ( like details of Clamp/ G.I. Bolts)

10. Details of Drawings submitted

15) EARTHING COIL :

EARHTING COIL TECHNICAL SPECIFICATION

SCOPE :

The specification covers design, manufacture, testing and dispatch to the owners

stores of Earthing Coils for use in earthing of the HT & LT poles.

GENERAL REQUIREMENTS :

Earthing coils shall be fabricated from soft GI Wire Hot Dip Galvanized. The

Hot Dip galvanized wire shall have clean surface and shall be free from paint enamel

or any other poor conducting material. The coil shall be made as per REC constructionsstandard.

The Hot Dip galvanizing shall conform to IS: 2629/1966, 2633/1972 and 4826/1969

with latest amendments.


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TESTS :

Galvanizing Tests

Minimum Mass of Zinc

On GI Wire used 280 cm/m

After Coiling-266 gm/m.The certificate from recognized laboratory shall be submitted

towards mas of zinc.

Dip Test

Dip test shall stand 3 dips of 1 minute and one dip of minute before coiling and 4

dips of 1 minute after coiling as per IS: 4826/1979

Adhesion Test

As per ISS 4826 1979

DIMENSIONAL REQUIREMENT

i) Nominal dia of GI Wire -4 mm (Tolerance2.5%)

ii) Minimum no. of turns 115 Nos.

iii) External dia of Coil (Min) 50 mm

iv) Length of Coil (Min) 460 mm

v) Free length of GI Wire at one end coil (Min.) 2500 mmvi) The turns should be closely bound. Weight of one finished Earthing Coils (min.)

1.850 Kg.

Guaranteed Technical Particulars of Coil Earth

Sl.No.

GENERAL TECHNICAL

PARTICULARSBidders

Offer

1 Nominal diameter of wire

2 No. of turns

3 External dia of Coil

4 Length of Coil

5 Mass of Zinc

6 Total weight of Coil

7 Whether drawing enclosed (yes)


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16) 3 Ph. 4 W LT Cross arm:

LT cross arm (3 phase ,4 wire) made out of 75mm x40 mm Channel . The cross arm shall be fabricated

out of (75x40) mm channel with 50mmx6mm cleats as per drawing on top & bottom flange of the channelwhere the insulator pin to be mounted, conforming to REC Construction Standard & drawing..

17) Back Clamp for LT Cross arm:

Back clamp for LT cross arm made out of 50x6 mm MS Flat with two coat of red-oxide primer suitable

for PSC poles confirming to REC Construction Standard & drawing.

18) LT straps Bolt & Nut :

LT strap for LT shackle insulator (type-1) made out Hot dip galvanized strap 3x35 mm -2 nos. GI Bolts &

nuts -12Mx115 mm -2 nos. with 3mm thick double spring washer conforming to REC Construction

Standard D4 & drawing.

19) 16 mm dia. Hexagonal Bolts & Nuts and Washer (G.I)

16 mm diameter GI Nuts and Bolts black hexagonal As per IS: 1387 (Part-II) Gr.-4/4.6 of following size.

M16x75 Nuts & Bolts (GI)

i) M16x100 Nuts & Bolts (GI)

ii) M16x125 Nuts & Bolts (GI)

iii)M16x150 Nuts & Bolts (GI)

iv)M16x175 Nuts & Bolts (GI)

v) M16x200MS Nuts & Bolts(GI)

vi)M16 GI Washer (GI)

Washers (GI) shall be round of thickness 1.5 mm suitable for 16 mm dia. bolts .

Specification finished products:

1. The bolts & Nuts shall be ISI Marked Mild Steel of Black Grade B and shall be round

with hexagonal head.

(i) The Bolts and Nuts shall be manufactured by Hot/Cold forging process neatly and cleanlyfinished and shall have metric threads as per IS : 4218/1967 with its latest amendments.

(ii) The dimensions of the bolts & nuts and tolerances should conform to IS: 1363 with their latestamendments in all respect. The eccentricity and angular errors of various elements shall be

within specified limits as per IS: 1367/1967 with its latest amendments the bolts & nuts shall befree from forging and threading defects such as cuts, spats. burns, bulging taper eccentricity,loose fill etc. which may affect their serviceability.


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(iii) The colt heads and nuts shall be chamfered on one face only and other face shall be machinedmade.

(iv) Mechanical property requirement of tester shall conform to IS: 1367 (Part-III)

1979 property class 4.6 for bolts & property class-5 for nuts as perIS: 1367 (Part VI) 1980.

(v) The bolts , nuts & washer are to be galvanized with hot dip as per IS: 2633/1989 withlatest amendment.

(vi) The bolts & nuts shall be supplied in well-cleaned conditions and suitably protected against

corrosion in individual bags of 50 kgs.

ACCEPTANCE TESTS:

The bidder should furnish test certificate from recognized Govt. Laboratory ( NABL accredited)giving the results of tests as per IS: 1367 (Part-Ill) 1979 & IS: 1367 (Part-VI) 1980 The testcertificate shall be in respect of the following for all sizes of both bolts & nuts as applicable given

below:-

i) Dimensional particulars (Sampling Ifl accordance with IS: 2614 for both bolts & nuts

(tolerance as per drawing).

ii) Tensile strength test on full size (for bolts minimum 400 NI Sq.mm and for Nuts Proof

Stress test Mm 610 N/Sq. mm).

iii) Power load test on full size bolts and M-12-51400 N for 15 Sec. iv) Head

soundness tests for bolts (no fracture).

v) Brinell hardness tests or Rockwell Hardness or Vickerss Hardness tests for bolts min-114 &max. 209 or mm. 67 & max. 95 or mm. 120 & max. 220 respectively. For nuts

Vickerss Hardness mm. 130 & max. 302.

Markings:

On the bolt head, there shall be identification marking of the manufacturer as well as property

class 4.6. If possible property class 5 shall be marked on Nuts also. Further

ISI mark shall be marked on Gunny Bags for proper identification.


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20. 100Amp Kit Kat Fuse :



Kit Kat Fuse unit with porcelain base & carrier of reputed brand complete with extended terminalsas per relevant ISS : 2086/1993, Amendment-I:

1. SCOPE

This application cover the manufacture, testing at works and supply of porcelain rewireable kit kat fuses

suitable for AC 3 phase 415 V 50 HZ solidly grounded neutral system.

2. WEATHER CONDITION:

The material used in construction of the fuse unit shall be suitable for use under following weather

condition:-

I) Temp. Range 0 to 50 Cii) Relative humidity 2% to 100%

iii) Altitude-upto 1000 Meters

iv) Use Outdoor, in dist. box or indoor in consumers premises.

3. RATED VOLTAGE AND FREQUENCY.

The fuses shall be suitable for continuous operation at AC 415 V and frequency 50 Hz.

4. RATED CURRENTS:

The rated currents of fuses units shall be 100/200 /300 Amps.

5. APPLICATION STANDARDS:

I) IS: 2086/1993 with latest amendment for fuses upto 100 A &This specification.

ii) This specification for 200 A/300A kit kat fuses.

6. GENERAL CONSTRUCTION REQUIREMENT OF KIT KAT FUSES:

6.1 MATERIALS:

This rewireable fuses units shall be made of ceramic which shall be of sand fine grain homogenous non-porous chemically insert and high electrical and mechanical strength and shall be thoroughly verified and

smoothly glazed. It shall be non-ignitable/ The porcelain and glaze shall be white or cream in colour. Theglaze shall cover at least those surfaces which are exposed when the ,fuses have been mounted in theintended manner. Themounting surface may be left unglazed. The materials should not have any defect

such as

i) Crazing : A hairline crack in glaze of ceramic material.

ii) Dunt : A hair line fracture extending through the body and the glaze and caused by strains set-up

in the process of manufacture of ceramics materials.


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iii) Projection : A raised imperfection, projecting more than 0.75 mm above the Surface of the ceramic

material.

iv) Water : The ceramics material shall not absorb more than absorption 2% of its weight of water

when broken and tested for.

6.2 The design and dimension of the fuses shall be either in accordance with r relevant IS 2086 -1993

6.3 PROTECTION:

The carrier and fuse base when installed in the intended manner shall have all live parts so protected as

to prevent inadvertent contact with such live parts.

6.4 HANDLING GRIP:

The fuse carrier shall be provided with a handle or grip and shall be shaped in acceptable manner so

that it will be easy to withdraw the carrier without use of any tools and without danger to any L.M. oroperator.

6.5 METAL PARTS:All metal parts shall be protected against corrosion by suitable methods.

6.6 FUSE BASE:

6.6.1. The fuses base shall be provided with two fixing holes for fixing the fuse base by means of screwier

bolts.

6.6.2. The fuse base shall have contacts for suitably engaging with the contacts of the fuse carrier rigidly

under any condition. The contacts shall be made out of such a metal which will not lose its

electricity due to heating of the contracts on full load with 20% overload current or heat generated

and required pressure is maintained even after repeated engagements and disengagement. The

contact for rating 63 A and above will also have extended strips for fixing cable lugs by means ofbolt.

6.6.3. Live parts on the underside of the fuse base for surface mounting shall be either covered by a shieldor barrier of insulating materials or be counter sunk not less than 3mm below the surface of the base and

covered with water proof insulating sealing compound which will not deteriorate or flow at a temp. lowerthan 100 degree C or on full load current with 20% overload or blowing of fuse under short circuitcondition or shall have clearance of not less 9mm for 100A, 200A and 300A size from the mounting

surface and reliably prevented from loosening.

6.7 FUSE CARRIER:

The fuse carried shall have contacts suitable for engaging with fuse base contacts. They shall be provided

with suitable terminals for the connection of the fuse elements. The fuse carrier shall be so constructed thatit is capable of being reversible for introduction into the fuse base. The contacts shall be made out of themetal which will not loose its elasticity on account of heating of the contacts on full load with 20%

overload conditions or heating due to blowing of the fuse element due to short circuit and requiredpressure is maintained and even after repeated engagement and disengagement.

6.7.2 Live parts of the fuse carrier shall be covered either by a shield for barrier of insulating materials orbe counter sunk not less than 3 mm below surface of the base and covered with water proof insulatingsealing compound which will not deteriorated or flow at temp. lower than 100 C.


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6.8 The asbestos cloth to be provided in fuse base shall be fire proof insulating and of sufficient lengthwidth and thickness.

6.9 SPRING FOR BASE PHOSPHOR BRONZE CONTACT (For 200 Amp/300 Amp only)

This should be round/elliptical made from high quality spring steel sufficient to maintain uniform pressure

on the contact surface when fuse carrier is fitted. The spring shall be of sufficient width and having 1 mm

thickness.6.10 SCREWS:

I) Screws upon which the general assembly of the fuse base and carriers terminals and contacts depend

shall be prevented from loosening or backing out buy lock, washers, stacking or other reliable means.

ii) If screws used in the assembly of a fuse are loosened or removed in order to install the fuse elements orto connect the fuse into a circuit they should be thread into metal and shall be provided with washers.

6.11 CURRENT CARRYING PARTS:

I) Current carrying parts shall be of robust construction and capable of carrying their rated current without

exceeding the temp. rise limits clause 4.2.1 of IS specification 2086-1993. i.e. 55 degree centigrade forrating 100amps & 65 degree centigrade for 200 amps/ 300 amp kit kat fuse.

II) Iron and steel parts shall not be used for current carrying parts except as clamping device or pressuresuch as punching screws, clamps or wire binding screws and nuts.

6.12 CONTACTS:

The contacts of the fuse base, fuse carrier, terminal blocks/strips shall be as under:

i] Fuse carrier contacts (Male Contacts) Tinned Brass

ii] Fuse Base Contacts (Female Contacts) Tinned Brass with terminal.

iii] Terminal block/strips Tinned Brass

The current carrying screws and washers shall be of tinned brass while the screw, washers not carrying

current shall be M.S. Galvanized M.S. Electro Galvanized bolt and nut with one plain washer and onespring washer suitable for 120 mm, 185 mm , 240 mm / 300 mm cable lugs shall be provided with

extended strips for 100A , 200A and 300A fuse respectively.

6.13 Chemical composition of the contacts. Electrolytic copper (tinned phosphor bronze (Tinned) use for

contacts of KK fuse shall confirm to various IS asstated below.

a) Electrolytic Copper

Copper strips used for contacts of kit kat fuse should confirm to IS:1897/1983 with latest amendments.

The material shall be of electrolytic tough pitch (ETP) grade with minimum 99.9% of copper & silver asper table I of IS191 part IV.

b) Phosphor Bronze

The phosphor bronze used for contacts of KK fuse shall confirm to any of the grade-I, II or III given in

IS: 7814/1985 (with latest amendments). The requirement of metal composition should be as per IS-7814.

c) Brass

It shall confirm to grade LCB1/DCB2 of IS-1264/1997 (with latest amendment)/IS 4101/1977 with

latest amendment). The metal composition for casting shall be as per IS 1264 and that of brass sheet, as

per IS 410

6.14 The contact fixing screw holes in fuses shall be fitted with insulating material fully into the surface of

the kit kat fuse carrier.


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7. EMBOSSING :

7.1 Every fuse carrier shall be clearly and indelibly embossed with the following information.

I) Rated Current

ii) Rated voltage

iii) Size of fuse wire

iv) Manufacturers name/Trade mark.

v) NESCO

7.2 Every fuse base shall be clearly and indelibly marked with the following.

I) Manufacturers name/Trade mark.

ii) NESCO

8.0 TYPE TEST CERTIFICATES:

8.1 The firm has to submit type test certificates for test conducted on their own brand name make for

reputed make fuses for all the tests as per cl.no. 9.0.3.1 of IS: 2086/1993 (with latest amendment) carriedout at CPRI Bhopal/Bangalore/ERDA, Baroda/ NIBL or Govt. Recognized laboratory .

8.2. The firm has to submit chemical composition certificates for each contact used in each rating of fusesoffered for sample tested at ERDA Baroda or any Govt.Recognized laboratory as per relevant ISS.

8.3 The above type test certificates and metal composition certificates shall be complete viz. for all testsand for all parts and submitted along with the offer. Incomplete/delayed test certificates and metalcomposition certificates shall not be considered.

The tests for rewirable fuses shall be carried out as per the procedure detailed in I.S.2086-1993. However,

for the guidance of the tenderer, the different type tests are mentioned below:

a) Visual examination.

b) Test for dimensions.

c) Test for mechanical endurance.

a) Test for mechanical strength.

b) Test for temperature rise: - As per Clause No.9.6 of I.S. 2086/1993, temperature rise of different partsof the kitkats when tested in an ambient temperature of 40 C, should not exceed 55 C.

c) Insulation Resistance test

d) High Voltage test.

e) Test for breaking capacity.

f) Test for water absorption.

g) Test on ceramic material.

h) Ignition test (for non-ceramic materials)

i) Test for withdrawal force.

9.0 ACCEPTANCE LOT:

9.1 SAMPLING CRITERIA:

The Number of fuse carriers and fuse bases to be selected from the lot shall be in accordance with

Appendix-B of IS: 2086/1993. However, the lot size shall constituted of all the fuse carriers and fuse basesof the same ratings.


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9.2 ACCEPTANCE TEST.

The fuse carriers and fuse bases selected as per 9.1 (of this specification) shall be subject to the acceptancetest in following order.

i) Visual examination (ii) Dimensional check (iii) Test for Mechanical endurance (iv) Test for withdrawal

force(v) Test for temp. rise (vi) Insulation resistance test (vii) High voltage test (viii) Temp. Cycle test.

N.B.: For purpose of temp. cycle test and temp. rise test one sample from every batch of

10000 (or less) for each current rating has to selected and tested.

10.0 ROUTINE TEST:

The routing test certificate duly signed by the testing engineers of the firm clearly stating that the

following routine tests has been conducted by him on each fuse unit, shall be kept ready and submitted to

the inspecting officer prior inspection of lot offered and testing of samples.

I) Visual examination

ii) High voltage test.

11.0 VERIFICATIONM OF METALIC COMPOSITION OF CONTACTS:

11.1 NESCO reserves the right to draw the samples of metallic parts of kit kat fuses for verifications ofmetallic composition at the time of manufacture from the lot offered for inspection. In addition to this, the

samples will be drawn from the lots received by the consignees for verification of metallic composition. Inthe event the metallic composition does not confirm to our specifications. The NESCO reserves the rightto cancel the order at the cost and risk of the supplier.

23. 10Amp TC Fuse Wire:

24. 63 Amp TC Fuse Wire:

TECHNICAL SPECIFICATION OF TINNED COPPER FUSE WIRE

1. SCOPE

This specification is intended to cover the design, manufacture and testing before despatch, supply anddelivery of Tinned Copper Fuse Wire at NESCO stores. Tinned copper fuse wire shall be used for

rewirable type electric fuses for protection of lines and transformers.

2 .STANDARD:-

The Tinned Copper Fuse wire shall be generally comply in all respect to the requirement of relevant

IS:9926/1981 amended upto date except wherever modified in this specification.

Consideration may be given to alternative which the supplier consider advisable by reasons of his own

manufacturing requirements and experiences, provided descriptive matter is submitted and recommendeddevice of arrangement is equal to or superior to that required by the accompanying specification and if the

purchaser is convinced of the quality and/ or superiority of the material.


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3. TECHNICAL SPECIFICATION:

The Tinned Copper Fuse wire shall be conforming to the IS:9926/1981 with latest amendments, if any.The Tinned Copper fuse wire shall comply with the following requirements:-

a) The fuse wire shall be made from electrolytic tough pitched (ETP) copper (tinned) conforming to

IS:8130/1984 amended upto date.b) The fuse wire shall be circular and shall have a uniform cross section and free from pits, draw marks

or any other harmful surface defects.

c) The tin coating layer shall be uniform, smooth, continuous and firmly adherent to the base copper

material.

d) The electrical properties of the material used for making the fuse wires shall be as given hereunder:-

e) i. Resistivity at 20 C --- 0.017241 ohm mm Sq./m

ii. Density at 20 C ---- 8.89 gm/cub cm.

iii. Constant mass temp. deficient of resistance at 20 C --- 0.00393/ C .iv. Coefficient of linear expansion --- 17 x 10-6 / C.

v. Diameter & maximum allowable Resistance

Rated Current

of fuse wire

Nominal diameter Tolerance (+/-) t Permissible resistance in Ohm per

meter at 20 C

1 2 3 4 5

A mm mm Max. Min.

2.5 0.13 0.002 1.3358 1.2426

6 0.20 0.003 0.5644 0.5250

10 0.35 0.004 0.1834 0.1730

16 0.50 0.005 0.0898 0.0848

20 0.63 0.006 0.0566 0.0535

25 0.75 0.008 0.0400 0.0376

32 0.85 0.009 0.0311 0.0293

40 1.25 0.011 0.0143 0.0136

63 1.50 0.015 0.0099 0.0094

80 1.80 0.018 0.0069 0.0065

100 2.00 0.020 0.0056 0.0053

200 To be furnished by bidder

4. TEST CERTIFICATE:

The bidder must furnish type test reports along with bid as specified in IS:9926- 1981 with latest

amendments, from the testing house as specified .

5. TESTS :

The samples of all ratings/ sizes will be tested as per sampling plan of ISS at your works free of cost in


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presence of our inspecting officer for compliance to the requirement of guaranteed technical particularsand relevant IS:9926/1981 .

for acceptance of offered lot.

Acceptance Tests

The following tests shall be carried out as Acceptance Tests on the samples to

be selected as per sampling plan:-

i) Visual examination.

ii) Dimensional Check.

iii) Resistance Check.

6. PACKING:

The wire shall preferably be supplied in spools weighing 10 gms to 50 gms. The spools shall be so packed

that the fuse wire are adequately protected against damages in ordinary handling and transit. The netweight of fuse wire of one spool should be 1000 gms to 2000 grms.

7. MARKING:Each packing containing spools/ reels/ coils of fuse wire shall be clearly marked with the followinginformation :-

i. Manufacturers name or trade mark.:

ii. Name of purchaser : NESCO

iii. Purchasers PO No. & date.:

iv. T he material of fuse wire i.e. copper.

v. Length and weight of each spool.

vi. ISI certification mark.

vii. The rated current.

25. No.6 GI Wire:

26. No.8 GI Wire :

TECHNICAL SPECIFICATION OF GI WIRE WIRE

1. Qualification Criteria of Manufacturer:-

The prospective bidder may source GI Wire from manufacturers only who must qualify all the

following requirements:a) The manufacturer must have successfully carried out Type Test of similar item from anyNABL Accredited Laboratory within the last 5 years, prior to the date of submission of the bid.

b) The manufacturer should have supplied at least 500 Kgs. (all sizes taken together) toelectricity supply utilities / PSUs. The bidder should enclose Performance Certificates from theabove users issued in the name of the manufacturer as proof of successful operation in field.

2. SCOPEThis specification covers manufacture, testing and supply of hot dip galvanized MS solid wireof sizes 6 SWG (5 MM) & 8 SWG (4 MM) diameters.


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3. APPLICABLE STANDARDS ZINC

Zinc shall conform to grade Zen 98 specified in IS 209& IS: 4826-1979 with up to date

amendments.

ZINC COATING

Zinc coating shall be in accordance with IS: 4826-1979 for heavily coated hard

quality.

GALVANISING

Galvanizing shall be as per IS: 2629-1966, IS 4826-1979 with up to dateamendments

UNIFORMITY OF ZINC COATING

Uniformity of zinc coating shall be as per IS: 2633-1972 with up to dateamendments

TENSILE PROPERTIES

The tensile strength of the wire after galvanizing shall be between 55-95 Kg/sq.mm ensuringMS wire mechanical properties as per IS-28:1972 8.1 to 8.3

FREEDOM FROM DEFECTS

As per IS: 2629-1966 & 4826-1979 & with up to date amendments be ensured

4. MATERIAL

The mild steel wire shall have chemical composition maximum sulphur- 0.055%, phosphorous

-0.055%, Carbon 0.25%.

5. TESTS

During the process of manufacturer/fabrication and all tests for chemical, mechanical,

galvanizing as per IS- 280-1979, IS1521-1972, IS-1755-1961, IS: 6745-1972 & 4826-1979shall be carried out. The certificate towards, chemical composition shall be submitted for eachlot offered for inspection.

The following tests shall be conducted in presence of the representative of the purchaser:Visual physical inspection and measurement of specified dimension

Coating test as per IS: 1755-1961, IS 2629-1966, IS: 2633-1972, IS: 4826-1969Adhesion test as per IS: 1755-1961, IS: 2629-1966, IS: 2633-1972, IS: 4826-1969,&

IS:6745-1972

Tensile strength and breaking load and elongation determined as per IS: 1521-1972 with up

to date amendments.

6. PACKING & MARKING

Packing shall be as per IS: 280-1979 and each coil shall be between 50-100 kg. marking shall

be as per IS:280-1972.


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Guaranteed Technical Particulars for No. 6 G.I. wire

Sl.

No.GENERAL TECHNICAL PARTICULARS

Guaranteed

Value

Bidders Offer

1 Nominal diameter of wire in mm 4.88 mm


3 Sectional Area (in Sq. mm.) 18.7038

4 Tensile strength of wire in N/mm/ MPa 550-900

5 Minimum breaking load (KN) 9

6 Variety Hard/Soft Soft

7 Type of Galvanizing Hot dipheavy coating

8 Weight of Zinc coating (Gms/Sq. Mtr.) 290

9 No. of dips the coating is able to withstand as 18 20C 3 dip in Min

10 Adhesion Test (Wrap Test at 1 turn per second coiling

while stress not exceeding % nominal tensile strength)

To be specified by

bidder

i) Min. complete turn of wrap do

ii) Dia of mandrel on which wrapped do

11 Bend Test do

i) Angle do

ii) Dia round a format to be bent do

12 Freedom from defect do

13 Chemical composition the MS Wire used shall notexceed

do

i) Sulphur 0.060% do

ii) Phosphorous 0.065% do

14 Weight of wire in Kg/Km 148

15 Tolerance in wt. + 5%

16 Standard according to which the solid wire is

manufactured and tested

IS: 280/1978 ,

IS: 4826/1979 ,

IS:7887/1975


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Guaranteed Technical Particulars for No. 8 G.I. wire

Sl.

No.GENERAL TECHNICAL PARTICULARS

Guaranteed

Value

Bidders Offer

1 Nominal diameter of wire in mm 4.06 mm


3 Sectional Area (in Sq. mm.) 12.9462

4 Tensile strength of wire in N/mm/ MPa 550-900

5 Minimum breaking load (KN) 8.79

6 Variety Hard/Soft Soft

7 Type of Galvanizing Hot dipheavy coating

8 Weight of Zinc coating (Gms/Sq. Mtr.) 2909 No. of dips the coating is able to withstand as 18 20C 3 dip in Min

10 Adhesion Test (Wrap Test at 1 turn per second coiling

while stress not exceeding % nominal tensile strength)

To be specified bybidder

ii) Min. complete turn of wrap do

ii) Dia of mandrel on which wrapped do

11 Bend Test do

iii) Angle do

iv) Dia round a format to be bent do

12 Freedom from defect do

13 Chemical composition the MS Wire used shall

not

do

iii) Sulphur 0.060% do

iv) Phosphorous 0.065% do

14 Weight of wire in Kg/Km 103

15 Tolerance in wt. + 5%

16 Standard according to which the solid wire is

manufactured and tested

IS: 280/1978 ,

IS: 4826/1979 ,

IS:7887/1975


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27. Aluminium Cable Socket

Cable Lugs of Aluminium tubular terminal end of any reputed make with ISI mark for crimping to all

conductors suitable for following cable sizes.

i) 70 mm , ii) 120mm , iii) 150 mm & 185mm

28. Piercing Connector

29. Neutral Connector

30. Suspension Clamp

31. Dead End Clamp32. Pole Clamp with Eye Hook

TECHINICAL SPECIFICATIONS FOR AB CABLE ACCESSORIES

Technical specification for insulation piercing connectors , Dead End Clamp (Anchor), SuspensionClamp , Neutral Connector & Eye hook for Arial Bunch Cables for working voltage upto and including1100 Volts.

INSULATION PIERCING CONNRCTOR(IPC)

1.0 Scope

This specification covers the design, manufacture, assembly, testing and supply of Insulation

Piercing Connectors(IPC)making connections to Bare Messenger L.T XLPE insulated Aerial BunchedCables rated up to1100 volts to L.TXLPEinsulated Aerial Bunched Cables / Service cable ( Twin coredouble insulated flat PVC Aluminium wire of different sizes)

2.0 Standard

The design, performance and test requirements shall confirm to this specification and the followingstandards.Howeverin case of any conflict, the requirements of this specification shall prevail.

1) REC Specification 83/2010 ( Insulation Piercing Connectors)2) NFC 33-020 ( Insulation Piercing Connectors)

3) IS 7098 part 1 XLPE insulated Cables4) IS 398 Part IV : aluminum alloy conductors


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The devices shall also be compatible with the cables of sizes & dimensions as defined in the cableSpecifications for the cables with which they are intended to be used.

3.0 CableData

AB CableThe standard sizes and characteristics of the phase and street lighting conductors, bare messengerwires shall be as specified in IS: 14255-1995 and REC Specification 32/1984 of following sizes

a) 3x95 (Insulated Phase)+1x70(Bare Messenger)+1x16(Insulated street lighting) sq.mm

b) 3x50 (Insulated Phase)+1x35(Bare Messenger)+1x16(Insulated street lighting) sq.mm

c) 3x50 (Insulated Phase)+1x35(Bare Messenger)

d) 2x50 (Insulated Phase)+1x35(Bare Messenger ) sq.mm

e) SERVICE CABLE

Twin core double insulated single strand flat PVC Aluminium wire of size 2.5/4/6/10 sq mm.

4.0 Types Of InsulationPiercing Connectors(IPC)

Insulation Piercing Connectors (IPC) is used for making Tee/Tap-off/Service connectors to an ABCLine. Insulation Piercing Connectors are designed to make a connection between the uncut main

conductor and a branch cable conductor without having to strip either cable to expose the conductor.Instead, the tightening action of the IPC will first pierce the Insulation, and then make good electricalcontact between the main end and branch conductor while simultaneouslyinsulatingand sealing the

connection.

The standard size ranges for various applications are given below:

Requirement Main Cable Size

rangeBranch Cable Size

range

Insulation PiercingConnectorsforTap off phase & Street Lightingcore

16-95 sq mm(AB Cable)


Insulation PiercingConnectorsforserviceconnections


2.5 -10 sq mm(PVC Al service

Cable)

4.1 Marking and Embossing

The Connector shall be indelibly marked with the followinginformation: Name orLogoof manufacturer

Name Purchaser, ModelNumber

Sizes of Max and Min Main and Branch cables for which it issuitable. The permanence of the marking shall be permanent.


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5. CONSTRUCTIONAL FEATURES OF INSULATION PIERCING CONNECTORS

The following features of Insulation piercing bare connectors are to be met for the qualificationcriteria

1. The connector bodies shall be made entirely of mechanical and weather resistant plasticinsulation material made of weather & UV resistant reinforced polymer and no metallic part

outside the housing is acceptable except for the tightening bolt or nuts.2. Any metallic part that is exposed must not be capable of carrying a potential during or after

connector installation.

3. Screws or nuts assigned for fitting with IPC must be fitted with torque limiting shear heads toprevent over tightening or under tightening While the min & max torque values are to bespecified by Manufacturer, these should not exceed 20 N mtr for IPC for main conductor < 95 sqmm and 30 N mtr for main conductor >95 but < 150 sq mm.

4. The IPC must perform piercing of Tap insulated conductor connection on Main cable

simultaneously using single bolt for tightening as multiple bolts do not ensure even tightening.Design of connector needs to avoid the stripping of insulated tap conductor and make the

connection by piercing the insulation.

5. The shear bolt/nut shall be suitable for tightening with a hexagonal spanner of 13 mm.

6. The contract blade of the connector is made of tinned copper/aluminum alloy.

7. The IPC shall be water proof and the water proof and the water tightness shall be ensured byappropriate elastomer materials and not by grease gel or paste alone. Grease can be applied to

protect the contact blade alone and shall not be visible of the outer surface of the connector.Connector should not be dipped in grease.

8. Each IPBC should be provided with a cap to seal the cut end of the insulated Branch cable. It

should be of a design that once the connector id fitted, it shall not be possible to remove the capwithout dismantling theconnector.

9. Design of IPBC should be such as to not cause damage to insulation of adjacent conductors dueto vibration and relative movement during service.

10. All the metallic parts of the connector should be corrosion resistant and there should not be anyappreciable change in contact resistance & temperature after overloads & load cycling and

should be confirm to the long duration tests specified in this standard.

6. TESTING REQUIREMENTS OF INSULATION PIERCING CONNECTORS

The following tests are intended to intended to establish performance characteristics of insulationpiercing connectors and categorized as follows:

SrNo. TestType

Test

Acceptance

Test

Routine

Test

1 visual X X

2 Dimensional X X


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3

Mechanical

ElectricalContinuityand

Shearhead & mechanical

behavior

Effectof tighteningthe

mechanical strength of

maincore

Checking mechanical

strength of tap core

X

X

X

X

X

X

X

X

X

4

Dielectric& Water

tightness testX X X

5 ClimateAgeing Test X

6 CorrosionTest X

7 Electricalageingtest X

7.0 General Test ConditionConnectors to be tested shall be identified using the following elements

Minimum marking details requested in this specification.

The minimum and maximum operating torque of shear off head.

Nominal torques of the re-usable tightening screws.

Min-Max conductor range suitable for Main and Tap.

8.0 SAMPLING PLAN FOR ACCEPTANCE TESTS

Sampling Plan for acceptance tests on IPCs are as per ISO 2895-1 as mentioned below.

a) For Visual and DimensionalSampling Level: General Inspection Level 1

SLNO LOT SIZE SAMPLE SIZE

1 51 to 90 5

2 91 to 150 8

3 151 to 280 13

4 281 to 500 20

5 501 to 1200 32

6 1201 to 3200 50

7 3201 to 10000 80

8 10001 to 35000 125

9 35001 to 150000 200

10 150001 to 500000 315

11 500001 & over 500

b) For Mechanical and Voltage Tests

Sampling Level: Special Inspection Level S-2


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SLNO LOT SIZE SAMPLE SIZE

1 51 to 90 3

2 91 to 150 3

3 151 to 280 5

4 281 to 500 5

5 501 to 1200 56 1201 to 3200 8

7 3201 to 10000 8

8 10001 to 35000 13

9 35001 to 150000 13

10 150001 to 500000 13

11 500001 & over 13

8.3 Type Test

For IPCs, the Type Test Report should be submitted from an Independent NABL AccreditedLaboratory like CPRI ,ERDA e.t.c / International Laboratory Accreditation Corporation,

Mutual Recgnitions arrangement (ILAC,MRA) signatory Laboratory like COFRAC

The installation of the connectors shall be done in the laboratory following instructions provided

by the manufacturer.The Test report shall include the Model Number, Applicable size Range, and GA Drawingshowing the principal parts and dimensions of the connector

The following shall constitute Type Tests for Insulation PiercingConnectors.

a) Electrical Ageing Test

b) Dielectric and Water Tightness Testc) Mechanical Tightening Test & Shear head

behavior d) Effect of tightening on main coree) Effect of tightening on branch core

f) Climatic test in accordance with NFC20-540g) Corrosion Test in accordance with NFC 33-003

8.4. Acceptance Tests

The Acceptance Tests are to be conducted as per clause no.6 above & REC Spec. 83/ 2010 and as perrelevant IS Specifications.

9.0 Drawings& Samples:

GA drawings, GTP and other particulars along with samples are to be submitted along with offer.


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10.0SUSPENSION CLAMPS

Scope

This specification covers the design, manufacture, assembly, testing and supply of Accessories for

suspending Aerial Bunched Cables rated 1100 volts and insulated with cross-linked polyethylene and

aluminum alloy bare messenger.

Description Application

a)

Suspension Clamp (as per RECConstruction standard E-34)

suitable for bare messenger ABcable (35-70 sq mm)

For supporting a length of ABC at anintermediate pole in a length, with

small angle of deviation.

10.1 Cable Data

The standard sizes and characteristics of the phase and street lighting conductors, bare messengerwires shall be as specified in IS: 14255-1995 and REC Specification 32/1984 of following sizes





10.2. GENERAL REQUIREMENTS

1. Suspension clamp shall be made of aluminum alloy of designation 4635 (IS : 617-

1975) of tensile strength greater than 200 N/mm2

(20.5 kgf/ mm2

) and shall be

capable of holding aluminum alloy messenger wire of 35 sq mm or 70 sq mm compacted

AAA Conductor. The eye hooks shall be made of forged steel (IS: 2004) or mils steel (IS: 1570).

2. The clamp shall be provided with black weather-resistant plastic coating of at least 1mmthickness toprevent the insulation of the phase conductors from chafing due to rubbing againstthe clamp.

3. Suspension clamp assembly shall provide sufficient flexibility to allow free movement of theclamp at both straight runs and angle locations.

4. The suspension clamp and hardware shall have good finish and shall be free from all flaws, sharp

radii of curvature and the edges shall be suitably rounded off.


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5. All ferrous fittings, eye hooks, bolts, nuts and washers shall be galvanized with Zinc conforming

to grade Zn 98 of IS: 209-1966. The spring washers and nuts etc. may be electro-galvanized. Nuts

shall be made of material conforming to property Class 4.8 of IS:1367-1967 for its mechanical

properties.

TESTREQUIREMENTS

1. Slip strength shall not be less than 25% of the tensile strength of the messenger wires of 25mm2

and 35mm2

sizes having tensile strengths of 7.4 KN and 10.3 KN respectively (tests to be

made separately for the two sizes).

2. Mechanical test Tensile strength at right angle to the direction of messenger wire shall not be

less than 15 KN.

TESTS

The suspension clamp shall be subjected to the following tests in accordance with the latest

version of IS:2486 (Part-I). Sampling plan as per clause no 8.0 above.

TypeTests AcceptanceTests RoutineTests

1. Slip strength test 1. Verificationof dimensions

2. Mechanicaltest 2. Galvanising test 1.Visual examinationtest

3. Verificationof dimensions 3. Mechanical test

4. Galvanising test

5. Visual examination test

NOTES :

I. Permissible tolerance shall be 5% on the indicated dimensions.

II. The supplier of the clamps shall provide necessary facilities at his works for the

acceptance tests.

10.3 Marking / Embossing

Anchoring Clamp, Suspension clamp should bear

- Manufacturers trade mark and logo

- Purchaser, NESCO

- Product Code or Reference

- Traceability Code/Batch Number


GA drawing and other particulars along with samples are to be submitted along with offer.


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ANCHOR (DEADENDCLAMP)

11.0 Scope

This specification covers the design, manufacture, assembly, testing and supply of Accessories

for anchoring Aerial Bunched Cables rated 1100 volts and insulated with cross-linked

polyethylene and aluminum alloy bare messenger.

Description Application

a)

Dead end Clamp ( as per RECConstruction standard E-35)

suitable for bare messenger ABcable (35-70 sq mm)

For fitting onto a pole for anchoringthe end of a length of ABC, or for a

major change in direction.

11.1 Cable Data

The standard sizes and characteristics of the phase and street lighting conductors, bare messengerwires shall be as specified in IS: 14255-1995 and REC Specification 32/1984 of following sizes





11.2. GENERAL REQUIREMENTS

1. The Dead End clamp shall be made of high strength Aluminium Alloy of designation 2280

(IS:617-1975) of tensile strength not less than 250 N/mm2

(27 kgf/mm2). The U-bar shall be made

of hot dip galvanised steel. The eye-hooks shall be made of forged steel (IS:2004) or mild steel

(IS:1570).

2. The clamp shall be suitable for holding both 35mm2

and 70mm2

messenger wire

sizes of compacted diameters of 7.62mm and 10.8 mm.3. The clamp shall have a cone for holding the messenger wire and it shall automatically grip

the messenger wiredueto tension of the wire.

4. The clamp shall be free from all flaws, irregularities and sharp radii of curvature.

5. All ferrous fittings, eye hooks, bolts, nuts and washers shall be galvanised with Zinc

conforming to grade Zn 98 of IS:209-1966. The spring washers and nuts etc, may be electro-

galvanised. Nuts shall be made of material conforming to property class 4.8 of IS:1367

for its mechanical properties.


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TESTREQUIREMENTS

1. Slip strength shall not be less than 90% of the tensile strength of the messenger wires of

35mmand 70mm

sizes having tensile strengths of 7.4 KN and 10.3 KN respectively (tests

to be made separately for the two sizes).

2. The mechanical strength of the Dead End clamp shall not be less than 2000 Kg. The test shallbe made separately for the clamp and the eye hook.

TESTS

The Dead End clamp shall be subjected to the following tests in accordance with the

latest version of IS:2486(part-10. Sampling plan shall be as per clause no.08.

TypeTests AcceptanceTests RoutineTests

a. Slip strength test a. Verificationof dimensions a.Visual examinationtest

b. Mechanicaltest b. Galvanising test

c. Electricalresistancetest c. Mechanical test

d. Heatingcycle teste. Verificationof dimensions

f. Galvanising test

g. Visual examination test

NOTES

I. Permissible tolerance shall be 5% on the dimensions indicated.II. The supplier of dead-end clamps shall provide necessary facilities at his works for the

acceptance tests.

11.3 Marking / Embossing

Anchoring Clamp, Suspension clamp should bear

- Manufacturers trade mark and logo

- Purchaser, NESCO

- Product Code or Reference

- Traceability Code/Batch Number




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12.0 EYEHOOKS

a) Eye hooks shall be of Hot dip GI as per REC construction standard E-35 (Type A)b) It should be made of forged hot dip galvanized steel as per IS-1570

c) The clamp corrosion resistance should conform to standards IS 2629 & IS 2633.

d) Minimum breaking Load should be 20 KN.

12.1 Type Test

a) Mechanical strengthb) Galvanizing test

12.2 Acceptance Tests

a) Verification of

dimensions. b) Galvanizingtestc) Minimum breaking load (KN)

The Acceptance Tests are to be conducted as per REC Spec. and as per relevant IS Specifications &sampling plan as per clause no.08 above.


GA drawing, GTP and other particulars along with samples are to be submitted along with offer.

13.0 NEUTRAL CONNECTOR

a) The Neutral Connector shall be as per REC Construction standard E-36.b) It should be consist of corrosion resistant extruded Aluminum Alloy body suitable for

messenger wire of size (35 70 sq mm) to (35 70 sq mm) /(1.5 10 sq mm).

GENERAL REQUIREMENTS

1. The connectors shall be made of aluminium alloy of designation 2280 (IS:617-1975) of tensile

strength not less than 300 N/mm2

(30.5 Kgf/mm2) (Fig. 1).

2. Type A connectors shall be suitable for holding main conductor/tap circular conductors ofdiameters ranging from 7.62mm to 10.8 mm.

3. Type B connectors shall be suitable for holding main conductors having compacted diameters

ranging from 7.62mm to 10.8 mm. and tap services cable conductor diameters ranging from1.8mm to 10 mm respectively.

4. All ferrous fittings, eye hooks, bolts, nuts and washers shall be galvanized with Zinc conforming

to grade Zn 98 of IS: 209-1966. The spring washers and nuts etc. may be electro-galvanized. Nuts

shall be made of material conforming to property Class 4.8 of IS:1367-1967 for its mechanical

properties.

5. The connectors shall be free from all irregularities, flaws and sharp radii of curvature.


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2. a) Tensile load test for type A connector shall be made with maximum and minimum sizesof tap conductors corresponding to the maximum size of main conductor i.e. two separatetests shall be made.

b) Tensile load test for type B connectors shall be mad with maximum and minimum sizes

of tap conductors/service cables corresponding to maximum and minimum sizes of mainconductor i.e. four separate tests shall be made.

6. The connector shall be covered by a black weather resistant insulation cover (Fig. 2) made ofpolyethylene at least 2mm thick to avoid short circuits.

TESTREQUIREMENTS

i) Ratednormalcurrent Type A Type B

(refers to tapped current 200A 25A

ii) Ratedshort timecurrent 300 A for 1second 300 A for 1 second

iii) Tensile load 110 Kg. 10% of the Breaking Load

of cableconductor

iii) ResistanceTest

Electrical resistance shall be conducted as per REC construction standard E-36 (Non tensionL.T connectors for tapping of lines and service connections for ABC system).

iv) TemperatureRiseTest

The steady state temperature rise of connector above the reference ambient temperature of 40Cwhen carrying rated current shall not exceed 45C.

TESTS: Sampling shall be done as per clause 8.0above.

TypeTest Acceptance Test RoutineTest

a) Tensile test a) Tensile test a) Visual examination

b Resistancetest b Resistancetest b Dimensional check

c) Temperaturerisetest c) Temperaturerisetest

d) Shorttimecurrent test d) Dimensional check

e)f)

Galvanising testDimensional check

1. The rated short time current and the temperature rise test shall be made with the

largest size of tap conductor for which the connector is intended to be used.

3. The resistance test shall hold good for all combinations of main and tap conductors. Thenumber of test samplesshall be decided by mutual agreement.


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4. All the above tests shall be carried out in accordance with IS:5561-1970 as amended fromtime to time.

5. Permissible tolerance shall be 5% on the dimensions indicated.

NOTE :

The supplier of the connectors shall provide necessary testing facilities at his works for the acceptance

tests.

13.2 Insulation Cover of LT Connectors are as per Fig;-2 of E-36.




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GUARANTEEDTECHNICALPARTICULARSFORINSULATIONPIERCING

CONNECTOR

Sl. No. DescriptionGuaranteed particulars to be submitted by

the Bidder along with offer

1Name and address of the Manufacturer

2

IsManufacturerof accessories

as ISO9001-2000

a) Copiesof certificateenclosedb) Are

GA drawingenclosed

c) Are Samplesare submitted

3 Applicablestandard

4 Type of connectors

5 Application

6Isany metallicpart carrying potential

inoperationexposed during

installation

7Are end caps ofbranch cable a)

Slideon type

b) Rigidtype

8Are torque limitingshear head

providedto tighteningbolts

9Range of cablesizes accommodated

for mainand branch

10 Min and Max torque defined

11Torque for establishing connection

between mainand branch

12 Materialused for teeth

13 Surfacefinishof teeth

14Maximumtensileloadfor no

breakdown of main conductor(cross

section)

15 Max. tensileloadon branch conductor

for no break/slippage16 Voltagewithstandunder water

emersion

17 No. of cycles

18 Max temp at each cycle

19 Markingand embossingon the

connector


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GUARANTEEDTECHNICALPARTICULARSFORSUSPENSIONCLAMPFOR BAREMESSENGER WIRE

Sl. No. DescriptionGuaranteed particulars to be submitted by

theBidderalong with offer

1 Name and address of the manufacturer


3 Type of clamp

4 Type of design

5 VoltageGrade(kV)

6Type & grade (metallic/non-metallic

material)

8Type of hot dipgalvanizing& thickness

of Zinccoating

9 Marking

10 Colourof non-metallicparts

11 Dimensions

12 Approximateweight

13 MinimumBreakingLoad (KN)

14 Maximumallowableload(KN)

15Max. angleof deviationof conductor

(degrees)

16 Method of casting

17 Are GA drawing& samplesenclosed


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GUARANTEEDTECHNICALPARTICULARSFORDEADENDCLAMPFORBARE

MESSENGER WIRE

Sl.. DescriptionGuaranteed particulars to be submitted by

theBidders

1 Name and address of the manufacturer


3 Type of clamp

4 Type of design

5 VoltageGrade(kV)

6Type & grade (metallic/non-metallic

material)7 Type of hot dipgalvanizing& thickness

of Zinccoating

8 Marking

9 Colourof non-metallicparts

10 Dimensions

11 Approximateweight

12 Ultimatetensilestrength(KN)

13 Maximumallowableload(KN)

14 SlipStrength (KN)

15 Method of casting

16 Operatingtemperature (deg.cent)

a) ContinuousOperation

b) Short circuitcondition



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GUARANTEEDTECHNICALPARTICULARSFORNEUTRALCONNECTORFORBAREMESSENGER WIRE

Sl.No.

DescriptionGuaranteed particulars to be

submitted by the Bidders

1Name and address of the

manufacturer2 Applicablestandard3 Type of clamp4 Type of design5 VoltageGrade(kV)6 Dimensions7 Approximateweight8 MinimumBreakingLoad (KN)9 Maximumallowableload(KN)10 Method of casting

11Are GA drawing& samplesenclosed

Guaranteed Technical Particulars of Eye Hook

Sl. No. DescriptionGuaranteed Technical

Particulars submitted by thebidder

1 Name and Address of the Manufacturer

2 Type of Hooks

3 Type of Hot Dip Galvanizing Thickness of ZincCoating

4 Dimensions in mm

5 Net Weight in Kg

6 Ultimate tensile strength



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33. Danger Board

TECHNICAL SPECIFICATION OF DANGER NOTICE PLATE :

a) The danger plate shall be affixed in a permanent manner on operating side of the panel,Substations, Distribution Boards , Electric poles etc..

b) The danger notice plate shall indicate danger notice both in English and Odiya , English & Hindiand with a sign of skull and bones.

c) The danger notice plate in general shall meet to requirements of local inspectingauthorities.

d) Dimension of the danger notice

I) For display at 415 V installations 200x150mm

II) For display at 11 KV / 33KV (or higher voltages) installations 250x200mmIII) The corners of the plate shall be rounded off.

e) The danger notice plate shall be made from minimum1.6 mm thick mild steel sheet andafter due pre-treatment to the plate, the same shall be painted white with vitreous enamel paint on

both front and rear surface of the plate.

f) The letter, the figure, the conventional skull and bones shall etc. shall be positioned onthe plate as per recommendations of IS

technocal specification of group-b

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