Discuss RCD for bathroom in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

B

beekeeper

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Hi everyone, my first post here in your very imformative forum, but just a couple of questions regardiong bathrooms installations.

Where a bathroom contains only low voltage lighting (Double insulated so no earthing required) why should an RCD be needed?, as we all know those things work on a current imbalance Ie. power flowing to earth due to a fault but if there is no earth it aint going to do anything so is totally unnecessary by my reasoning, any thoughts on that?

The other thing that i am not too sure on is the use of mains ceiling extractor fans once again double insulated, are these permisable when a bathroom does not contain a shower and is out of the splash region, i knoiw zone 3 no longer exists so in theory as it is now classed as zone two but if there is no way anyone can gain access to the interior exposed wiring without the use of tools i see no reason not to be able to install one.

The regs are never clear on some things.


BK
 
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S

Spudnik

  • Thread Starter Thread Starter
  • #2
Hi and welcome to the forums....

Now this is my own opinion, but i would always put bathroom lighting on RCD if ive been working on it, as my name is on the cert.

As for fans, mains are fine, but again, i would not be happy about installing one directly over a bath, regardless of zones.
:)
 

old dog

-
Arms
Hi and welcome to the forums....

Now this is my own opinion, but i would always put bathroom lighting on RCD if ive been working on it, as my name is on the cert.

As for fans, mains are fine, but again, i would not be happy about installing one directly over a bath, regardless of zones.
:)
if there is 230v present in the bathroom on the supply side of the transformer
and the switch line and the rcd protects the cable
 
B

beekeeper

  • Thread Starter Thread Starter
  • #4
Many thanks for prompt reply Jason, yes i do appreciate what you are saying but could you put up a good argument for not doing so as i really think the regs are to rigid on that one and leave a lot to be desired.

BK


Hi and welcome to the forums....

Now this is my own opinion, but i would always put bathroom lighting on RCD if ive been working on it, as my name is on the cert.

As for fans, mains are fine, but again, i would not be happy about installing one directly over a bath, regardless of zones.
:)
 
D

desertbootz

  • Thread Starter Thread Starter
  • #5
Could have sworn there was a requirement for CPC to every fitting...
 
S

Spudnik

  • Thread Starter Thread Starter
  • #6
Could have sworn there was a requirement for CPC to every fitting...
There is if its class I, although the cable should still have a cpc present, connected at the supply end.
 
B

beekeeper

  • Thread Starter Thread Starter
  • #8
There is if its class I, although the cable should still have a cpc present, connected at the supply end.
Yes of course, although a cpc is always present in standard wiring cables and is connected at the supply end, it is not connected at the transformer, so in theory an RCD would only be protecting the supply cable and nothing else, which the way i see it is totally pointless, unless of course there is something else connected to that circuit which does require an earth connection in which case the Rcd would be required.

I just wish ithat nstead of all the rubbish concerning the nucleus of the regulation, someone for a change would just make a regulation that is in plain language that everyone can understand with grey areas eliminated.

BK
 
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