sub main

[jimjamjimajam]

Hi guys. Can't find anything in the regs and can't think of any reason why it wouldn't be acceptable but is there a reg that states a sub main cannot be supplied from another sub main inline of the origin?
Thanks in advance

 

[Darkwood]

Discrimination!.... depends on the protective devices and the ocpd's used in the final submain... will a S/C be just as likely to take out the Submain fuse as it would the final circuit.

So any mcb - mcb combination would not meet discrimination albiet you may achieve it between a 63amp and a 6amp but only partial for any other combinations.

 

[Richard Burns]

sounds very similar to this post
http://www.electriciansforums.co.uk/electrical-forum-general-electrical-forum/102388-live-side.html

 

[davesparks]

There is nothing specifically forbidding it, there would be a lot of installations in trouble if there was!

 

[jimjamjimajam]

Thanks. Thought as much