Job - rewire Public House. Information - 1) large pub with connecting bars to 4 rooms 2) Two lighting distribution boards in corridor connecting bars. 3) About one hundred lights connected to dist boards. 4) Two 24 gang switchboards behind middle bars. When one dist board was isolated (fuse pulled) and circuits disconnected it was found that a number of "neutrals" were in fact now live because the feeds to the neutrals now live were fed from the other dist board. Clue - A lot of lights went out that shouldnt have (plus the neutrals were arcing like mad) Dangerous!!!