nmx consumer units for use in domestic household premises nmx... · multiple occupancy homes such...

NMX Consumer Unitsfor use in DomesticHousehold Premises

Amendment No. 3 BS 7671

Wylex_NMX_CUs_WY2284a_(Q10).qxp 20/10/2016 20:42 Page F1

Wylex products are designed in theUK by Wylex engineers, the localR&D department in Wythenshawe,Manchester ensures that Wylexproducts meet the relevant British,European and International productstandards.

Furthermore, Wylex products aretested within the Wylex UKASaccredited laboratory to verify designand performance criteria prior toproduct being put into productionfor sale.

These highly accredited facilities ensure that safety,quality & reliability remain consistent with UK & EU legislationregulations & Siemens internal standards, policies and practices.

Wylex factories operate a series of internationally recognizedstandards including ISO9001 for quality, OHSAS 18001 for Health & Safety andISO14001 for Environmental Management.

Wylex products are RoHS and REACH compliant often in excess of the UKmarket standards

Recycled materials are used in product packaging, and declared into a recyclingscheme locally to control environmental impactsand assure that the maximum level of recycling ofmaterials and use of recycled materials is achieved.

As a Siemens company Wylex also operates a zeroharm scheme within all of its manufacturinglogistics & sales facilities.

Acknowledged as the market leader in the UK domestic circuit protectionmarket Wylex offers designers & specifiers the widest range of quality productsthat caters for a vast array of domestic (household) applications.

Wylex_NMX_CUs_WY2284a_(Q10).qxp 20/10/2016 20:42 Page F2

Amendment 3 Regulation 421.1.201 2

CONTENTS

17th Edition & Requirements for 30mA RCCBs 4

NMX All Metal Consumer Units 6

NHX MCBs & RCBOs 7

Consumer Unit Accessories 8

Dimensions 9

Amendment 3Meter CabinetMetal Cased

Consumer Unitsfor use in DomesticHousehold Premises

:

NMFS Intumescents & Accessoriesfor use in Consumer Units forDomestic Household Premises

Amendment No. 3 BS 7671

Switch Fuse Unitsfor use in DomesticHousehold Premises

(and other buildings)

For the full range of solutions please also see the above catalogues

Wylex_NMX_CUs_WY2284a_(Q10).qxp 20/10/2016 20:54 Page 1

This guide to Wylex consumer units and similar switchgear is not a suitable substitute for the standards and regulations that should always be used for all types of electricalinstallation design & installation work.

REGULATION 421.1.201

Since January 2016 Amendment No. 3 to BS 7671 IETWiring Regulations states that within domestic(household) premises, consumer units and similarswitchgear assemblies shall have their enclosuresmanufactured from non combustible material, or beenclosed in a cabinet or enclosure constructed of noncombustible material and comply with product standardBS EN 61439-3.

What are Domestic Household Premises ? Typical Domestic household premises would include single andmultiple occupancy homes such as Houses, Bungalows, High Rise & Low Rise Flats, Apartments, Student Lets, ShelteredAccommodation, Farmhouses, Houseboats, Static Homes, Home Office, Attached Garages, Workshops and DetachedSummerhouses etc.

What is Non Combustible Material ?There are many types of non combustible material however,Amendment 3 of the 17th Edition Regulations provides anacceptable example as ferrous metal i.e. Steel Consumer Units.

What is an Enclosure ?An enclosure means the box, cover, door, hinges, handle and anycomponents required to maintain the integrity of the unit. Theconsumer unit enclosure must be manufactured from a noncombustible material so as to limit the spread of fire.

What is Similar Switchgear ?

Similar switchgear is switchgear that is used for the samefundamental application ie. a circuit protection assembly with twopole isolator and one or more circuit protection devices, e.g. MCBdistribution board, switch fuse, garage unit or PV switchgear etc.

What are Cabinets ?Typical cabinets are meter cabinets that are normally built into thefabric of the building and that may or may not include consumerunits within.

What about Cable Entry ?As usual good workmanship and proper materials should beapplied to all installation work, consumer units must be installedto achieve IP4X on the top elevation (regulation 416.2.2) andIP2XC on all other elevations. This can be achieved by use of cableentry accessories such as consumer unit pattress or other meanssuch as glanding. In all cases the mains tails should be protected atthe point of entry into the consumer unit e.g. by use of a suitablegland or other accessory to protect against the possibility ofmechanical damage and for disturbance that could lead to tailsbecoming loose and making contact with the metallic enclosure.

CONSUMER UNITS FOR USE INDOMESTIC HOUSEHOLD PREMISES

17th Edition Wiring Regulations Incorporating Amendment No. 3 : 2015


What about Cable Entry ?Where metal consumer units are installed into TT systems it is recommended that the mains tails are protected against thepossibility of becoming loose and making contact with the metal enclosure by incorporating into the installation 100mA time delayed(S type) RCCB protection.

Furthermore in all cases (including TT) the mains tails should be protected at the point of entry into the metal enclosure e.g. by useof a mains tails gland to protect against the possibility of mechanical damage and or disturbance that could lead to tails becomingloose and making contact with the metal enclosure.

CONSUMER UNITS FOR USE INDOMESTIC HOUSEHOLD PREMISES

17th Edition Wiring Regulations Incorporating Amendment No. 3 : 2015

l Dual screw mains tail terminals on mainswitch & main neutral bar

l Seamless enclosure & lid

l Lockable lid

l Compact enclosure footprint

l All metal enclosure, no external plastic parts

l Low Smoke & Fume paint

l Non combustible cover blanks

l Compact enclosure

l ‘No miss terminal’ fixed / flexible busbar

easily configured at installation

l Raised & removable busbar & pan assembly

l Cable entry knockouts on 5 sides, top,

bottom, left, right and rear

l Plain side enclosure versions (rear knockouts)

l Mains tails cable entry grommet / glandavailable for supplementary insulation similarto Class II level of protection to mains tails

l Flame retardant cable entry grommetsavailable for outgoing circuits

l Time delay RCD available

l 18 module enclosures offering MainSwitch, High Integrity, Split Load & Dual RCDversions

l Flexible modular DIN rail for control devicesalongside MCBs & RCBOs

l RoHS compliant in excess of UK standards

l UKAS certified to BS EN 61439-3

l 80A 30mA RCCBs as standard


CONSUMER UNITS FOR USE IN DOMESTIC HOUSEHOLD PREMISES17th Edition Wiring Regulations Including Amendment No. 3

REGULATIONS RELATING TO: EXAMPLES Upstairs Sockets Downstairs Sockets

Kitchen Sockets Cooker outlet with integral 13A socket

Garage Sockets Plus any other sockets up to 20A rated

Shower circuit Lighting circuit Heating circuit

Ventilation circuit Shaver Socket

Plus Other circuits

Downstairs Lighting Upstairs Lighting

Immersion heater Smoke Alarms

Burglar Alarm (Safety service) Plus any other circuits

It is recommended that where metal consumer units are installed into TT systems the mains tails are protected against the possibility of becomingloose and making contact with the metal enclosure by incorporating into the installation a 100mA time delayed (S type) RCCB protection.

Furthermore in all cases the mains tails should be protected at the point of entry into the metal enclosure by use of a mains tails gland to protectagainst the possibility of mechanical damage and or disturbance that could lead to tails becoming loose and making contact with the metalenclosure.

* Regulation 411.3.3 socket outlets with a rated current not exceeding 20A. ** Regulation 701.411.3.3 Additional protection shall be provided for all circuits of the location by use of one or more 30mA RCD.*** Regulations in the 522.6.200 series cables concealed in a wall or partition at less than 50mm depth and without earthed mechanical protection

e.g. conduit.**** Regulation 314.1 Every installation shall be divided into circuits as necessary to avoid danger and inconvenience in the event of a fault, take

account of danger that may arise from the failure of a single circuit such as a lighting circuit, reduce the possibility of unwanted tripping of RCDsetc.

**** Regulation 314.2 Separate circuits to be provided for parts of the installation that need to be separately controlled in such a way that thosecircuits are not affected by the failure of other circuits.

***** Regulation 560.7.1 Chapter 56 circuits for safety services shall be independent of other circuits. In addition Chapter 51 requires designers/ installers to take account of all relevant British Standards and manufacturers instructions. For exampleBS5839 Part 6 is the British Standard for fire detection and alarm systems in dwellings. It states that power supplies to Grade D smoke alarmsshould be an independent circuit at the consumer unit, or a separately electrically protected local lighting circuit.

****** Regulation 416.2.2 requires that the installed consumer unit achieves IP4X (1mm probe) on the top elevation. All other elevations should beto IP2XC (2.5mm probe).

ADDITIONAL PROTECTION

30mA RCD

30mA RCDs

30mA RCD

411.3.3*

701.411.3.3**

522.6.200 seriesand

560.7.1*****

Sockets up to20A rating

Taking into account3.14.1 ****3.14.2 ****



All Circuits serving orpassing through a roomwith a fixed bath orshower

All circuits buried ina wall or partition atless than 50mm andwithout mechanicalprotection

Seamless enclosure with soft curves and roundedprofile to blend into its surroundings

Amendment No3 has brought about the requirement for ‘all metal’ non combustible enclosures for consumer units and similar switchgear.

This is in addition to the requirements for Additional Protection (30mA RCD) as summarised below. Within domestic household premises.

lAll socket outlets should be protected by 30mA RCDl All circuits serving or passing through a room with a fixed bath orshower should be protected by one or more 30mA RCDs**

l All cables buried beneath the plaster surface of the wall or partition(at less than 50mm) should be protected by 30mA RCDs***

l All cables concealed in metal stud partitions (common in newbuilds) should be protected by 30mA RCDs***

l Installations should be divided up into circuits so as to take accountof danger and inconvenience caused by a single fault - e.g. such as alighting circuit****

l Installations should be designed and arranged so as to preventunwanted tripping of RCDs****

l Safety services such as smoke alarms should be on independentcircuits*****

l Installed units must be to IP4X on top elevation & IP2XC elsewhere

17th Edition Wiring Regulations Including Amendment No. 3

Mains tails load terminals benefit from doublescrew connections

Unique clip in busbar that offers ‘no miss’ fixedterminations and flexible configurations in one!

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EXAMPLES OF CONSUMER UNIT APPLICATIONS

ALL INDEPENDENT CIRCUITSFull Metal Main Switch unit with RCBOs

HALF INDEPENDENT CIRCUITSFull Metal Split Load unit with RCBOs and MCBs

SOME INDEPENDENT CIRCUITSFull Metal High Integrity unit with RCBOs and MCBs

ALL INDEPENDENTCIRCUITS

Full Metal Main Switch 100mA

Time Delay RCD

S

I

0

B

NO INDEPENDENT CIRCUITSFull Metal Dual RCD unit with MCBs

B

B B

30mA Earth leakage protection

100mA Time Delay S Type RCCB

As recommended by IET for TT SystemsB

A


6

NMX16

MAIN SWITCH - WITH KNOCKOUTS ALL SIDES

MS MS RCD RCD TOTAL CAT REF RATING WAYS WAYS WAYS WAYS KNOCKOUTS

NMX16 100A 16 - - 16 All sides

MAIN SWITCH - PLAIN SIDES


NMX16P 100A 16 - - 16 Rear only (plain sides)

NMXRS14SL

SPLIT LOAD - WITH KNOCKOUTS ALL SIDES


NMXRS14SL 100A 5 - 9 9 - 5 14 All sides

SPLIT LOAD - PLAIN SIDES


NMXRS14SLP 100A 5 - 9 9 - 5 14 Rear only (plain sides)

NMXRS12SSLHI

HIGH INTEGRITY - WITH KNOCKOUTS ALL SIDES


NMXRS12SSLHI 100A 1 - 6 6 - 1 6 - 1 12 All sides

HIGH INTEGRITY - PLAIN SIDES


NMXRS12SSLHIP 100A 1 - 6 6 - 1 6 - 1 12 Rear only (plain sides)

NMXISS12

DUAL RCD - WITH KNOCKOUTS ALL SIDES


NMXISS12 100A 12 All sides 2 - 6 6 - 2

DUAL RCD - PLAIN SIDES


NMXISS12P 100A 2 - 6 6 - 2 12 Rear only (plain sides)

NMX All Metal Consumer Units


7

Consum

er Unit O

utgoing Devices &

Control M

odules

DIN RAIL MODULAR DEVICES FOR USE IN NMAX UNITS

CAT REF PRODUCT MODULE

ME242/230 Staircase timer 1SMSCD11 Digital time clock 1 channel 1xNO/NC contact 16A 1TMSCD21 Digital time clock 1 channel 1xNO contact 16A 2TMTCD22 Digital time clock 2 channel 24 hour 7Day prog 2MESB-20NO 20A 2 pole contactor 1MESB-24NO 24A 4 pole contactor 2MESB-40NO 40A 4 pole contactor 3MESB-63NO 63A 4 pole contactor 3MTS8 Bell transformer 12V 8VA 2TRMSCT31 Disc type time clock 1 channel 1xNC contact 16A 3TRMSCT11 Disc type time clock 1 channel 1xNC contact 16A 3SMSCT11 Disc type time clock 1 channel 1xNO contact 16A 1

Requires half DIN Rail clip (NMXDR2) to fit in Consumer Unit

MINIATURE CIRCUIT BREAKERS (6kA)

B CURVE C CURVE RATING POLES MODULES

- NHXC03 3A 1 1NHXB06 NHXC06 6A 1 1NHXB10 NHXC10 10A 1 1NHXB16 NHXC16 16A 1 1NHXB20 NHXC20 20A 1 1NHXB25 - 25A 1 1NHXB32 NHXC32 32A 1 1NHXB40 NHXC40 40A 1 1NHXB50 NHXC50 50A 1 1

ACCESSORIES

MCBLDX MCB Locking device WPL Padlock for MCBLDXNMXDR2 DIN Rail InsertNMXBB2I Comb Busbar

NHX RCBO (combined MCB/RCD device)

B CURVE C CURVE CURRENT RATING RCD RATING POLES MODULES

NHXSBS1B06 NHXSBS1C06 6A 30mA 1 1NHXSBS1B10 NHXSBS1C10 10A 30mA 1 1NHXSBS1B16 NHXSBS1C16 16A 30mA 1 1NHXSBS1B20 NHXSBS1C20 20A 30mA 1 1NHXSBS1B25 - 25A 30mA 1 1NHXSBS1B32 NHXSBS1C32 32A 30mA 1 1NHXSBS1B40 NHXSBS1C40 40A 30mA 1 1NHXSBS1B45 - 45A 30mA 1 1NHXSBS1B50 NHXSBS1C50 50A 30mA 1 1

WRCBL RCBO - 2 POLE (combined MCB/RCD device)

C CURVE CURRENT RATING RCD RATING POLES MODULES

WRCBL6C2 6A 30mA 2 2WRCBL10C2 10A 30mA 2 2WRCBL16C2 16A 30mA 2 2WRCBL20C2 20A 30mA 2 2WRCBL32C2 32A 30mA 2 2WRCBL40C2 40A 30mA 2 2

NHXB06 NHXB16 NHXB32 NHXB50 NHXB10 NHXB20 NHXB40

MESB-40NO

NHXSBS1B06 NHXSBS1B16 NHXSBS1B32 NHXSBS1B50 NHXSBS1B10 NHXSBS1B20 NHXSBS1B40

WRCBL32C2


NMMB NHB1PP

CABLE ENTRY ACCESSORIES

CAT REF PRODUCT

EIU Moulded cable gland suitable for 16mm2 or 25mm2 metertails

NMCE1 7 x 20mm and 3 x 32mm Flame retardent grommetsNMCE2 10 x 20mm Flame retardent grommets

8

Accessories

TIME DELAYED (S TYPE) RCCB AND ENCLOSURE

CAT REF PRODUCT

On application 100A 100mA time delay RCCB

Products made to order. Contact Wylex technical

Also see data on page 5, items & BA

EIU NMCE1

NMX ACCESSORIES

CAT REF PRODUCT MODULE

NMMB Metal blanking plate - Twist fit 1NHB1PP Blanking plate - Busbar & cover (insulated 960ºC) 1NHET25 25mm Earth Terminal -WPL Padlock for NHLDK & MCBLDX -NMXDR2 DIN Rail Insert 2NMXBB2I Comb Busbar 21NMXLDK Temporary Door Locking Device -


NMX METAL CONSUMER UNITS

18 MODULE

NMX16 NMX16P NMXRS14SLNMXRS14SLP NMXRS12SSLHI NMXRS12SSLHIPNMXISS12 NMXISS12P

372 124.5

235

266

170

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Dim

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ELECTRIUM SALES LIMITED A SIEMENS COMPANYCommercial Centre, Lakeside Plaza, Walkmill Lane, Bridgtown, Cannock WS11 0XE.

eMail: [email protected] Web: www.electrium.co.uk Twitter: follow@ElectriumNews

UK SALESTelephone: 01543 455020 Facsimile: 01543 455021 eMail: [email protected]

TECHNICALTelephone: 01543 438320 Facsimile: 01543 438321 eMail: [email protected]

EXPORT SALESTelephone: +44 1543 455049 Facsimile: +44 1543 455048 eMail: [email protected]

Although every effort has been made to ensure accuracy in the compilation of the technical detail within this publication, specifications and performance data are constantly changing. Latest details can be obtained from Wylex.

Publication No. WY2284b 10/16Printed in England. @ElectriumNews or download the APP


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