A CU can be far more dangerous and confusing place than the REC enclosure . Yes the tail could comeout, but that is only the half of it, especially with a normal main switch and DP RCBOs as some advice suggests.
There are many wires from final circuits of all shapes and sizes, and in some boards extra wires flapping about from circuits now isolated, but seemingly left in either just for luck or it was too hard to untangle, or perhaps in case of later need. Thinner wires like 1mm CPC can be quite springy, and may miss the terminals altogether and if it slips down the back of the MCBs could catches the bus-bar, all is lost, or they could hit the pre-switch live.
Even without the TT hazard there is a lot to be said for an isolator with only 4 clearly defined terminals and wires that pretty well fill them, and with TT, there is merit in it being an RCD, and no metal or CPC anywhere near it..
A CU can be far more dangerous and confusing place than the REC enclosure . Yes the tail could comeout, but that is only the half of it, especially with a normal main switch and DP RCBOs as some advice suggests.
There are many wires from final circuits of all shapes and sizes, and in some boards extra wires flapping about from circuits now isolated, but seemingly left in either just for luck or it was too hard to untangle, or perhaps in case of later need. Thinner wires like 1mm CPC can be quite springy, and may miss the terminals altogether and if it slips down the back of the MCBs could catches the bus-bar, all is lost, or they could hit the pre-switch live.
Even without the TT hazard there is a lot to be said for an isolator with only 4 clearly defined terminals and wires that pretty well fill them, and with TT, there is merit in it being an RCD, and no metal or CPC anywhere near it..
