My incoming supply fuse has been uprated to 100A. As well as one CU with a 100A RCD, there is also two separate 63A RCDs each with their own fused switch for outside services. These RCDs are connected in parallel with the CU, directly to the output side of the meter. Is their rating OK, given that their only protection from the power station is the supplier's 100A fuse?
RCB v.s. Main fuse rating.
- Thread starter beano1939
- Start date
Sponsored Links
what mcb's are powered from them?
Sponsored Links
That's fine then as both 40A and 60A are less than the rating of each 63A RCD.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
