question about the CPC (earth* ) outside of the junction box, this is covered by no conductive part shall be exposed, no exposed insulation can be outside of an accessable connection box. all sheathing must now terminate inside the box i think 17th new but i forget. ( was pulled up by NAPIT for this (was only about .5mm but was enough for him to say needed putting right) I know i can hear the electricians on here groaning... i suspect there was a little of the all inspectors have to find something wrong...the reason im told is its to do with under fault conditions PFC prospective fault current can reach upto 6000 A and could cause combustion, or be touched. i know i had similar feeling but thats the rules...
one of main reasons regs are so tight now is we load the circuits far far higher than we did... if anyone in any doubt how important this is, and potentially deadly here is a little tale
arrived at house electrics not working... found 2.5mm as a fuse (changed) gets worse...so its burnt out cable somewhere, continuity tested ok except 2 sockets not working, left it to confirm with landlord rewire, told tenant don't use all these sockets on ring, ( didn't listen i know i should have known) went back next day,
all the ring was gone, started lifting floor boards.....found a bridged ring, (hence tested ok)...and a floor board scorched through to within 5-6mm of surface full width for 2 meter lenth in the hallway 2 rings 2 lighting circuits and shower cable all melted together ...basically this was within minutes of causing fire in hallway, only the conductors vaporizing stopped it...deadly....this as far as we could tell had existed for 15 years no changes ...why did it suddenly happen, they increased load, aquarium and some pet hot box thing (3KW)..... that's why regs are greater why non electricians shouldn't do work, a family of 5 nearly died..........