UK Are surge protection devices fitted before or after the main switch

[Strima]

Quite a good explanation from ABB on one type of SPD:

View: https://www.youtube.com/watch?v=33XBMj9jHHc

 

[MJPD29]

in LVE , SPD is before main switch View attachment 54817



[automerge]1577093974[/automerge]

In the LVE board it’s before main switch, I’m trying to understand this and the way it’s wired, it appears to be wired before the main switch aswell.View attachment 54818

Its after the main switch in your picture

 

[davesparks]

In the LVE board it’s before main switch, I’m trying to understand this and the way it’s wired, it appears to be wired before the main switch aswell.View attachment 54818

That board looks terrible, the SPD is all off to cock straight out of the box. I'd return that to whence it came and get something fit for purpose.

 

[Baddegg]

CEF special I believe?

 

[multimick]

fitted a few ,there ok ,no problems at all.

 

[UKPN]

Ian 1981 is correct, the devices are after the outgoing terminals of the main switch, in parallel with the busbar. You can see the neutral looped from the outgoing terminal.

 

[Risteard]

CEF special I believe?

Nothing to do with CEF.

 

[L1Jay1]

Nothing to do with CEF.

That’s what I thought

 

[Norah Nabino]

Are surge protection devices fitted before or after the main switch

Before the main switch.

 

[Midwest]

After the main switch, just like everyone else said

 

[Mike Johnson]

I think the correct way is to fit a SPD after the suppliers switch and before the DB isolator, well that is the way all of them are fitted in France, an MCB is required according to the type of SPD, some have overload protection build in.