Sub main advice please

[mossep]

I picked an example at the other end of the spectrum on purpose to be honest. The regulation doesn't say how many fuse board there needs to be before you need an isolator to turn it all off, it just says that every installation needs one at the origin.

 

[Nigel]

Youve changed your tune haha

Exactly what I was thinking.

 

[Octopus]

537.1.4 A main linked switch or linked circuit-breaker shall be provided as near as practicable to the origin of every installation as a means of switching the supply on load and as a means of isolation.

A main switch intended for operation by ordinary persons, e.g. of a household or similar installation, shall interrupt both live conductors of a single-phase supply.

BYB page 154

In such a case where there are 2 boards or more, you could argue that 537.1.6 would then apply ................... (BYB p 154)

 

[Wilko]

In such a case where there are 2 boards or more, you could argue that 537.1.6 would then apply ................... (BYB p 154)

Can you believe they've deleted 537.1.6 from BBB. I think we will have the same label at 514.15.1 and perhaps 537.2.7 (new) which says isolators to be clearly identified.