Split load consumer unit wiring | DIYnot Forums Jan 26, 2013I consider the idea of a split load unit so that if an RCB trips you don't lose all power or all lighting. I think # 5 mcb should be moved to position 10, # 7 to pos. 2, whilst (now having a free space at pos. 5) #s 2 - 4 all physically move one place left. (this keeps the 40a spare closest to the incomer). How to install a 17th edition consumer unit - Electric Help Split load consumer unit -The power on the consumer unit coming in is taken through a double pole switch to both RCD’s and then to 2 separate live buss bars. Each, MCB, is clipped onto a DIN bar and the "teeth" of the buss bar are inserted into the bottom of the MCB's.
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