The older fuse wires are being replaced gradually by their modern equivalent the mcb or miniature circuit breaker. Electricians day installing shower circuit and consumer unit find.

Rcd Fuse Box Wiring Diagram
Shower consumer unit wiring diagram. If the route is over 20m use 16mm 2 cable and a 45amp. Wiring an electric shower electric and power shower installation. See diagram below. The unit distributes the electricity via fuses of one kind or another to the different circuits in the house. 18th edition consumer unit upgrade. Any advice appreciated and if you know of a wiring diagram thats easy to understand that would also be appreciated.
The modern consumer unit is the centre or heart of the wiring system in the home. Ive bought a volex shower consumer unit kit which has an mcb and an rcd in so i can fit the shower. Measure the distance between the consumer unit and shower heater to work out how much cable you will need. Thanks in advance. Ive run a cable from the fuse in my main consumer unit but i am not sure how to wire the volex cu up. If the cable route is over 13m or the shower is rated up to 10kw use 10mm 2 cable and a 45amp cartridge fuse of mcb.
If the cable route is under 13m and the shower is rated up to 8kw use 6mm 2 cable and a 45amp rewireable fuse. Pouse around the house 62600 views. You may find that you need to drill holes through joists to get from the consumer unit to the shower if this is the case ensure that the holes you drill are in the middle of the joist and are large enough to safely route the cable through.