I have installed a new garage consumer unit fitted with an RCB unit and 2 MCB's rated 6a for the lights, and 16a for the sockets. But, when I powered it up and tried the lights and sockets the RCB kept tripping out. I know I have not gone through any cables and all circuits are wired correctly, so I removed the RCB and wired direct to the MCB's and all is well.(The MCB's do not trip), I have already got an RCB fitted to the house from which this unit is fed. Can you fit 2 RCB units in the same circuit?, or do you think the RCB rating should be higher. (Rated at 30ma 40A) same as the house?
I would be grateful for any advice on this problem.)
I would be grateful for any advice on this problem.)