New Form 4 switchboard but DNO want confirmation that the integral CT chamber is of Class 2 construction as per BS7671. No specific Reg given. It is not something that I have been challenged on before but I can only see some loose implication in 557.5.3.1 indent (iii).
AJ,
TN-S
Indent (iii) of 557.5.3.1 reads;
Doh, should have gone to specsavers - I'd read (i) 
(iii) doesn't read as class II construction to me either - as that's usually a matter of the outer enclosure being reliably insulating to prevent electric shocks - class II construction wouldn't necessarily separate one live part from another within the same enclosure (unless I'm miss-interpreting what's being asked for ... wouldn't be the first time)
- Andy.
Doh, should have gone to specsavers - I'd read (i)
(iii) doesn't read as class II construction to me either - as that's usually a matter of the outer enclosure being reliably insulating to prevent electric shocks - class II construction wouldn't necessarily separate one live part from another within the same enclosure (unless I'm miss-interpreting what's being asked for ... wouldn't be the first time)
- Andy.
