No RCD on entire installation

[davesparks]

But if he chooses a main switch RCD is that something that can be done with a 30ma.

That depends on what type of protection you want the RCD to provide.

 

[Wilko]

Hi Sparky - as Dave says it depends on the device and what you want it to do. If you look at Table 53.4 its got the standards and use approvals (read all the footnotes). Hope that helps

 

[Taylortwocities]

I am personally leaning towards putting RCD sockets on all 3 that I have worked on.

But that does not provide the required protection for the buried cabling.
Stand alone RCD at the DB end is the way to go, as there's no RCBO space.

 

[Octopus]

But if he chooses a main switch RCD is that something that can be done with a 30ma.

Not an option IMHO..............

 

[Taylortwocities]

Not an option IMHO..............

Concur. One fault will take out the whole office. Not what you, or the client will want.

 

[gazdkw82]

if you have had some mcb's taken out, have you now got room for fit an rcd?

 

[Taylortwocities]

He hasn't taken any MCBs out, has he?

 

[gazdkw82]

IM sure he said previously that there were 2 mcbs disconnected

 

[sparky1508]

IM sure he said previously that there were 2 mcbs disconnected

There was 2 disconnected, 1 of which I have reconnected and there is now only 1 spare way in the current CU.

 

[gazdkw82]

Enough room for an rcbo?

 

[sparky1508]

Enough room for an rcbo?

As above, no room for RCBO.
I have given the client his options and he has said he would like the sockets labelled for specific equipment. I know this does not have any safety aspect at all but he is the client and I can only do what he asks for.
Thanks for all the input and advice.

 

[Roofus]

From a different perspective: We don't install RCD's on circuits which have a number of servers due to tripping of RCD's etc. The servers power supplies filter out electrical noise which they dump to the CPC. So we cover this in our risk assessment and label sockets up for IT equipment only. You might want to check your earth cable is up to scratch for protective current flowing from servers and run additional earth cable if required.

 

[marc8]

No room for RCBO's, CU already chock full.
I think I will speak to the client and see which direction he wants to go. I am personally leaning towards putting RCD sockets on all 3 that I have worked on. But if he chooses a main switch RCD is that something that can be done with a 30ma.

if you look at the work you have undertaken on 3 sockets I would go for RCD protection local to the work you have undertaken, after testing the circuit you have joined on to. the reason for this if you put an upstream RCD in circuit & there is a problem on equipment it could trip & you could be blamed for the circuit tripping.
if circuit / circuits test out okay install a RCD socket outlet issue a minor works anything plugged in will trip your RCD socket only & not trip the whole circuit / circuits, at this point you have protected your work & covered yourself.

 

[marc8]

if you look at the work you have undertaken on 3 sockets I would go for RCD protection local to the work you have undertaken, after testing the circuit you have joined on to. the reason for this if you put an upstream RCD in circuit & there is a problem on equipment it could trip & you could be blamed for the circuit tripping.
if circuit / circuits test out okay install a RCD socket outlet issue a minor works anything plugged in will trip your RCD socket only & not trip the whole circuit / circuits, at this point you have protected your work & covered yourself.

& if for a server I would think twice about RCD protection as above post #42, I would tend to run in a new circuit for server & clean earth.

 

[Pete999]

IMO, he has made alterations to the circuit, at the very least the spured socket should be off a RCD FCU or up front RCD in closure for the circuit in question.

Or an RCD socket