Filling in switch fuses on a certificate

[snipersmith87]

No I totally agree Murdoch. This is where I'm starting to confuse myself.

Long week

 

[snipersmith87]

Long week

What if 40amp supply to a switch fuse. 63amp fuses in switch fuse.

It's not my idea of doing things...…..need a single phase supply so pick up from a local 3 phase circuit point. It should have a separate supply as a single phase circuit....BUT, which regulation gives non compliance?
As regards the DB, it's been taken from a final sub circuit so what is the difference between that and a fixed fused spur.
I wouldn't treat it as separate DB with it's own schedule but make a note on the cert.
Edit. What about rcd with the socket?

It's not my idea of doing things...…..need a single phase supply so pick up from a local 3 phase circuit point. It should have a separate supply as a single phase circuit....BUT, which regulation gives non compliance?
As regards the DB, it's been taken from a final sub circuit so what is the difference between that and a fixed fused spur.
I wouldn't treat it as separate DB with it's own schedule but make a note on the cert.
Edit. What about rcd with the socket?

Already coded

 

[buzzlightyear]

What if 40amp supply to a switch fuse. 63amp fuses in switch fuse.

what are the sub main cable ?

 

[shaun1]

If I have understood correctly and the circuit is fed from a 32A MCB, then surely the 32A fuses are redundant as they dont add any aditional protection, and I would have thought the MCB would always operate first (unless maybe its a D curve?)