WYLEX NHX Series

WYLEX NHX Series MCBs, RCBOs & associated RCDs.

Current range of WYLEX BSEN60898 MCBs for domestic & light commercial use. Not suitable for fixed busbar teeth of WYLEX TPN boards, does however use a toothed busbar

Popular in social housing/council specifications, there are a great number of WYLEX boards installed with NHX circuit protection across the UK.

NHX series circuit breakers are 6000A breaking current (6kA) and the range is as follows:

  • 60898 Type B MCB = 6A, 10A, 16A, 20A, 32A, 40A, 50A
  • 60898 Type C MCB = 6A, 10A, 16A, 20A, 32A, 40A, 50A
  • 61009 Type B RCBO = 6A, 10A, 16A, 20A, 32A, 40A, 50A
  • 61009 Type C RCBO = 6A, 10A, 16A, 20A, 32A, 40A, 50A
Wylex NHX MCB Sizes + alternatives
Wylex NHX MCB Sizes + alternatives

NHX Type B MCB Specifications

Breaking Capacity According to BS EN 60898 & IEC 60898: 6kA (6000A)

Rated Voltage: 230V / 400V AC

Maximum Operating Temp: 55 degrees C

Part Numbers:

  • NHXB6 – 6A Type B MCB
  • NHXB10 – 10A Type B MCB
  • NHXB16 – 16A Type B MCB
  • NHXB20 – 20A Type B MCB
  • NHXB32 – 32A Type B MCB
  • NHXB40 – 40A Type B MCB
  • NHXB50 – 50A Type B MCB
WYLEX MCB size comparison
WYLEX NHX MCBs in a Split Load Consumer Unit (17th edition era)

NHX Type C MCB Specifications

Breaking Capacity According to BS EN 60898 & IEC 60898: 6kA (6000A)

Rated Voltage: 230V / 400V AC

Maximum Operating Temp: 55 degrees C

Part Numbers:

  • NHXC6 – 6A Type C MCB
  • NHXC10 – 10A Type C MCB
  • NHXC16 – 16A Type C MCB
  • NHXC20 – 20A Type C MCB
  • NHXC32 – 32A Type C MCB
  • NHXC40 – 40A Type C MCB
  • NHXC50 – 50A Type C MCB

NHX MCB Dimensions (Both Type B & Type C)

Both B & C type MCBs share the same dimensions as each other.

All MCBs & RCBOs share the same single module (1P) width

The height (top to bottom) is: 89mm

WYLEX NHX SERIES MCB LENGTH DIMENSIONS SIZE
WYLEX NHX SERIES MCB LENGTH

The ‘Depth’ which is the total front-to-back measurement (furthest point above shoulder of din rail connection): 70mm

WYLEX NHX SERIES MCB "DEPTH" (FRONT TO BACK) DIMENSIONS SIZE
WYLEX NHX SERIES MCB “DEPTH” (FRONT TO BACK)

The depth of the busbar connection from the front face of lower part of MCB: approx 29~30mm

Busbar connection is by cage clamp to front. Also has cut outs at the front for busbars which screw to the MCB instead of the toothed busbar.

Note clamp leaves gap at back, beware that busbar tooth is correctly located in MCB and not behind the cage clamp during assembly/re-assembly

WYLEX NHX SERIES MCB "BUSBAR CONNECTION" DIMENSIONS SIZE
WYLEX NHX SERIES MCB “BUSBAR CONNECTION”

NHXSBS1 Type B RCBO Specifications

WYLEX NHXSBS1 Type B RCBO Sizes & Measurements
WYLEX NHXSBS1 Type B RCBO

Breaking Capacity According to BS EN 61009 & IEC 61009: 6kA (6000A)

Rated Voltage: 230V / 400V AC

Maximum Operating Temp: 55 degrees C

Part Numbers:

  • NHXSBS1B06 – 6A Type B 61009 RCBO
  • NHXSBS1B10 – 10A Type B 61009 RCBO
  • NHXSBS1B16 – 16A Type B 61009 RCBO
  • NHXSBS1B20 – 20A Type B 61009 RCBO
  • NHXSBS1B32 – 32A Type B 61009 RCBO
  • NHXSBS1B40 – 40A Type B 61009 RCBO
  • NHXSBS1B50 – 50A Type B 61009 RCBO

NHXSBS1 Type C RCBO Specifications

Breaking Capacity According to BS EN 61009 & IEC 61009: 6kA (6000A)

Rated Voltage: 230V / 400V AC

Maximum Operating Temp: 55 degrees C

Part Numbers:

  • NHXSBS1C06 – 6A Type C 61009 RCBO
  • NHXSBS1C10 – 10A Type C 61009 RCBO
  • NHXSBS1C16 – 16A Type C 61009 RCBO
  • NHXSBS1C20 – 20A Type C 61009 RCBO
  • NHXSBS1C32 – 32A Type C 61009 RCBO
  • NHXSBS1C40 – 40A Type C 61009 RCBO
  • NHXSBS1C50 – 50A Type C 61009 RCBO

Alternative Fitments?

The WYLEX NHX series of circuit breakers & RCBOs use the same toothed busbar and share a similar busbar connection layout as the following:

  • WYLEX NSB Series MCBs & RCBOs – Direct Swap

NB: Contactum (the company who manufacture WYLEX) have confirmed to us that the NHX series MCBs are a direct swap for previous NSB series MCBs/RCBOs. They paid us to install NHX MCBs into NSB board during the massive recall completed on their NSB circuit breakers. Indeed if you still come across any of these circuit breakers then Contactum will still pay you directly to swap then on behalf of the customer.

WYLEX Manufacturer Site: WYLEXs manufacturer page

WYLEX NHX Specification Sheet: WYLEX Specifications for the NHX series of circuit protection

BUY NHX MCBs & RCBOs at the following link: Screwfix WYLEX MCBs