tank youYou need to minimise the posibility of one fault knocking out an entire house. Hence the idea of having one rcd for upstairs circuits and one for downstairs (or for 3 story houses having a third rcd 'side'). See 314.1As for rcd's on cables less than 50mm, this really only applys to domestic. Comercial and industrial locations are generally under the supervision of a 'qualified' person so 522.6.7 superceeds 522.6.6
YESrcd for cables <50mm depth domestic/
There are exceptions within Com&Ind where use of equipment & work on the building fabric is under the control of a Skilled or instructed persons..commercial/industrial?
he is getting cofused with 0.4 disconnection timesnic guy is saying all sockets regardless of commercial or industrial!!!!!!!!!!!!!!!?????????????
Mr Piggy - you return. Your absence was notedWell i havent done my 17th yet, but i would guess its so that everything doesnt go off at once. If you have one lighting circuit on the first RCD and the other lighting corcuit on the second RCD, then if one of the RCD's trip you still have lights (and sockets etc) functioning.
KME is NOT absent - He simply removed himself from the (prospective) line of fire.........Mr S does the pushy shovey on behalf of KME's absence:_| X( :^O:^O:^O:^O
Its not the NICEIC its in the regs book 411.3.3 (i) ; \nic guy is saying all sockets regardless of commercial or industrial!!!!!!!!!!!!!!!?????????????
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