Consumer unit: which comes first?

[Pete999]

Sorry Murdoch, my post mentioned Main Switch to isolate the rest of the circuits connected to this fuse board, 1 fuse board 1 main switch, no mention of another fuse board, if the installation had more than 1 fuse board then the same would apply to each fuse board, can't see how you corrected it for me.

See what you are getting at now Murdoch, ignore my post above

 

[Octopus]

^^ I did. I knew you were wrong!

 

[Richard Burns]

Inside a CU the main switch is first, then (if present) DP RCDs protecting a block of circuits, then MCBs or RCBOs protecting individual circuits or distribution circuits out of the CU.
If there are multiple boards fed directly from the same supply then there should be a main switch that isolates the installation as a whole between the supply and the boards, though each board should have its own main switch as well.
If the supply is remote from the board (generally >3m) then a circuit protective device should be installed less than 3m from the supply head.

 

[Toneyz]

Gary
Hi you don't tell us what you are in your profile, by that I mean: Electrician, Domestic Installer, Apprentice, Trainee or DIYer in order to tailor replies we need to know at what level you are.

It's difficult to respond to a O.P. in the way of terminology if people don't fill it in.

 

[Toneyz]

With such a worrying opening question I don't have much hope for this thread.

The thing is with a lot of posts they should be either in the trainee section where noble members can give their time and experience or the DIY section.

 

[Gary Tollison]

Hello again.

well, I must apologise if this is not the correct area for this post!

A thank you to those who have helped.