UK Electrical Supplies

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MK Electric Sentry Metal Fully Populated 21 Way Consumer Unit

Product Code: K7678SMET
Brand: MK Electric

Coronavirus (COVID-19) Delivery Delays: Please note that due to the current global situation, some orders may be delayed.

RRP: £358.67 ex VAT
£ 80.40 ex VAT or £ 96.48 inc VAT

This MK Electric Sentry Metal Fully Populated 21 Way Consumer Unit (K7678SMET) is pre-fitted with a 100A switch disconnector; 63A and 80A 30mA RCDs; and all the split-load cabling you could ask for. It comes complete 12 MCBs, including 3 X 6A, 2 X 16A, 2 X 20, 4 X 32A, and 1 X 40A. This versatile consumer unit allows users to position the RCD to suit the desired configuration of RCD protected and non-protected circuits.*

As part of the Sentry range, this attractive consumer unit’s smooth curves and slim-line appearance are sure to complement their surroundings. It boasts a durable design with a top hinged door and sealed side holes. For easier installation, the range also incorporates a Din Rail “T” Bar to support the weight of devices and three large feed holes for additional wiring flexibility. It benefits from convenient continual earthing as well, so you only need to earth once via the base.

*As long as you don’t exceed the rating of the switch or RCD

  • 21 way enclosure
  • Colour: White
  • 100A switch disconnector
  • 1 X 63A & 1 X 80A 30mA RCDs
  • 12 X MCBs
    • 3 X 6A
    • 2 X 16A
    • 2 X 20A
    • 4 X 32A
    • 1 X 40A
  • Can accommodate 3 more single module products
  • Degree of protection to BS EN 60529 to IP2XC
  • To maintain IP rating, take precautions e.g. use cable glands and knockouts
  • BS EN 61439-3​​​
  • MK recommends the use of RCBOs for non RCD protected circuits to comply with 17th Edition Amendment 3 Wiring Regulations
  • Dimensions (mm): width - 472, height - 244, depth - 116
  • Product code: K7678SMET


  • Free (2-5 working days) delivery on UK Orders over £75.00 ex. VAT
  • Free collection from our Hampton Hill (Middlesex) or Chessington (Surrey) Branches
  • Saver delivery (2-5 working days) - £5.00 ex. VAT

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We offer a 14-day money back guarantee on all items*, provided they are returned in accordance with our terms in the link below.
* excluding made to order items

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