koc recommended practice for electric supply to equipment via socket outlets koc_e_019

8/10/2019 KOC Recommended Practice for Electric Supply to Equipment via Socket Outlets KOC_E_019

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DOC NO KOC E 019 I o 11 I REV 1

KOC

RECOMMENDED PRACTICE

FOR

ELECTRIC SUPPLY TO EQUIPMENT

VIA SOCKET OUTLETS

DOC NO. KOC E 019

Rev

1 9 / 0 8 / 9 6

Date

Issued as KOC Recommended Practice Dr M lycu

Snr Engineer StdsTat 6 1 4 0 6

DescriptionStandards Division

Td 61 S 4 t

Prepared byTd 6 1 4 0 8



TABLE OF CONTENTS

SCOPE

APPLICATION

TERMINOLOGY

REFERENCE CODES AN D STANDA RDS

ENVIRONMENTAL CONDITIONS

GENERAL REQUIREMENTS

PROVISION FOR EARTHING

SPECIFIC REQUIREMENTS FOR HAZAR DOUS AREAS

INTERLOCKS

INSPECTION AND TESTING

QUALITY ASSURANCE

MARKING

DOCUMENTATION

PAGE NO

4

4

4

6

7

8

9

1

1

1

11

11



S OPE

This Recommended Practice describes general requirements for plugs and

socket-outlets, cable couplers and appliance couplers with a rated operatingvoltage not exceeding 690 d.c. or a.c. with frequency up t o 500 Hz and arated current not exceeding 12 5 A.

2.1 This Recommended Practice (RP) is applicable t o socket-outlets orappliance inlets incorporated in or fixed to electrical equipment for usein both onshore and offshore facilities.

2 2 t may also be applied, when appropriate, t o temporary power suppliesduring major overhauls on the existing facilities or new constructionsites when authorized b y the KOC.

TERMINOLOGY

KOC

Kuwait Oil Company (K.S.C.).

Plua and Socket-Outlet

A means consisting o f t wo parts enabling the connection of a flexiblecable t o fixed wiring.

Cable Coupler

A means consisting of two parts enabling the connection of twoflexible cables.

Rewirable Plua or Connector

An accessory so constructed that the flexible cable can be fit ted orreplaced, using general purpose tools.

Mechanical Switchina Device

A switching device designed t o close and open one or more electricalcircuits by means of separable contacts.

Switched Socket-Outlet

A socket-outlet wit h an associated switching device to disconnect thesupply from the socket-outlet contacts.



DOC. NO. KOC E 019 Pane of 1 1 I REV. 1

lntearal Switchina Device

A mechanical switching device constructed as a part of an accessory.

Interlock

A device either electrical or mechanical which prevents the contactsof a plug from becoming live before t is in proper engagement w it h asocket-outlet or connector which either prevents the plug from beingwithdrawn while its contacts are live or makes the contacts deadbefore separation.

Retainina Device

A mechanical arrangement which holds a plug or connector in positionwhen t is in proper engagement and prevents its unintentionalwithdrawal.

Insulation Voltage

The voltage assigned to the accessory by the manufacturer and towhich dielectric tests clearances and creepage distances are referred.

Rated Current

The current assigned to the accessory by the manufacturer.

Rated O ~e ra ti na oltaae

The nominal voltage of the supply for which the accessory i s ntendedto be used.

S u ~ ~ l e m e n t a r v nsulation

An independent insulation provided in addition to the basic insulationin order to ensure protection against electric shock in the event of afailure of basic insulation.

Terminal

A conductive part provided for the connection of a conductor t o anaccessory.

RCD

Residual Current Device.



4 0 REFERENCE CODES AND STANDARDS

In the event of conflict between this Recommended Practice RP) and

the Codes referenced herein, the most stringent requirement shallapply unless otherwise specified.

Any exceptions or deviations from this document, along wi th theirmerits and justifications, shall be brought to the attention of KOCControlling Department for their review, consideration and amendmentby Standards Division if required).

A list of documents is given below which are referred in thisRecommended Practice. However, the list does not preclude the useof other technical source of information provided that they do notconflict wi th the listed Standards.

STANDARDS

Specification for 13 A fused plugs and switched and unswitchedsocket-outlets.

BS 1363 Part 3

Specification for 13 A plugs, socket-outlets and adaptors.

Requirements for electrical installations. IEE Wiring Regulations.Sixteen edition.

IEC 79-0

Electrical apparatus for explosive gas atmospheres. Generalrequirements.

IEC 79-1

Electrical apparatus for explosive gas atmospheres. Constructionand verification fest of flameproof enclosures of electricalapparatus.

IEC 309-1

Plugs, socket-outlets and couplers for industrial purposes.General requirements).



IEC 09-2

Plugs, socket-outlets and couplers for industrial purposes.(Dimensional interchangeability requirements for pin and contact-tube accessories).

IEC 309-3

Plugs, socket-outlets and couplers for industrial purposes.Particular requirements for plugs, socket-outlets, connectors andappliance inlets for use in explosive gas atmospheres.

KOC-G-007

KOC Standard for Basic Design Data.

5.0 ENVIRONMENTAL CONDITIONS

5 1 The environment of Kuwait, is severe on all equipment and must beconsidered carefully before procurement of plant and equipment. t

must be assumed that, unless otherwise specified, equipment may besubjected to sand and fine particle dust storms, salt laden winds,thunderstorms, heavy rains, chemical contaminants and extremetemperatures.

5.2 KOC Standard for Basic Design Data, KOC-G-007 , provides thedetailed design information regarding the environmental, site, andutility supply conditions prevailing throughout the KOC facilities.

6.0 GENERAL REQUIREMENTS

6.1 All cases involving plugs and socket-outlets and cable couplersinstallations in classified areas which are not constructed in

accordance with the requirements of hazardous areas shall requireapproval from KOC.

6.2 The types o f protection employed shall be selected from appropriatetypes as specified in IEC 79-0.

6.3 Plugs, socket-outlets and cable couplers shall be selected inaccordance with IEC 309-1, IEC 309-2 and IEC 309-3 and shall be ofsplashproof category.

6.4 Socket-outlets, plugs and couplers wi th a rated current higher than

16 A for both portable and non-portable equipment shall also complywith IEC 309-1 and IEC 309-2.

http://mykocportal/sites/ts/isg/st/Contents/Standards/Xlinks/General/KOC-G-007%20R2.pdf






In unclassified areas like control rooms offices etc. fused plugs andswitched and unswitched socket-outlets and adaptors with ratedcurrent of 13A shall comply with BS 1363 and BS 1363 part 3 and

their use shall be confined to unclassified areas.

For offshore applications the watertight accessories shall be used.

Al l electrical equipment and installations shall be protected against theeffects of heat that may be radiated or conducted from the processplant and the likelihood of damage due to vibration corrosion orchemical action.

Socket outlets plugs and couplers of different voltages shall no t beinterchangeable.

All types of plugs and socket-outlets cable couplers and appliancecouplers shall be so designed and constructed that in normal use theirperformance is reliable and without danger to the user orsurroundings.

t shall not be possible to engage plugs or connectors with socket-outlets or appliance inlets having different ratings or having differentcontact combinations.

t shall not be possible t o make single-pole connections between plugsand socket outlets or connectors or between appliance inlets andconnectors or socket outlets. Improper connections include single-pole connections and other connections which do n ot comply wi th therequirements for protection against electric shock.

Terminals shall allow the connection of conductors having nominalcross-sectional area in accordance with IEC 309-1 and shall clamp theconductor between metal surfaces with sufficient contact pressureand without damage to conductor.

Rewirable accessories shall be provided with terminals in whichconnection is made by means of screws nuts or equally effectivedevice. Screws and nuts for clamping shall have an IS 0 thread or athread comparable in pitch and mechanical strength.

7.0 PROVISION FOR EARTHING

7.1 Accessories wit h earthing contact shall be provided wit h an earthingterminal.

7.2Earthing contacts shall be directly and reliably connected to theearthing terminals.

7.3 Earthing contacts shall be capable of carrying a current equal to tha tspecified for the phase contacts without overheating.



system is normally part of the pre-qualification procedure and i s herefore notdetailed in the core text of this Standard.

12 0 MARKING

12 1 Where applicable all accessories used in hazardous areas shall bemarked according to the type of protection and gas group as specifiedin IEC 79-0 together w it h the relevant marking requirements of S andIE Standards.

12 2 Where symbols are used for marking these shall be in accordance wit hIEC Standards.

12 3 For other relevant nformation on Packing Marking and Documentation

refer to KOC-G-004 .

13 0 DOCUMENTATION

13 1 All correspondence drawings instructions data sheets designcalculations or any other written information shall be in Englishlanguage.

13 2 All dimensions units of measurement Physical constants etc. shall bein SI units unless otherwise specified.

http://mykocportal/sites/ts/isg/st/Contents/Standards/Xlinks/General/KOC_G_004.PDF

http://mykocportal/sites/ts/isg/st/Contents/Standards/Xlinks/General/KOC_G_004.PDF

koc recommended practice for electric supply to equipment via socket outlets koc_e_019

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