New ceiling light fitted.....now RCB tripping

kevinyork · Posted: Fri Jan 15, 2010 7:57 pm

Got a new house. Had an electrician install a BIG ceiling light this week and I mean big. Its a 20 x 20w spiral with an inbuilt transformer. Looks superb but a couple of times when turning it on the RCB for that circuit trips. It resets ok but not sure what the problem is. Any advice please?

JohnD · Posted: Fri Jan 15, 2010 8:01 pm

RCB is wrong

do you mean MCB?

Or RCD?

What is printed on it?

sparkydude · Posted: Fri Jan 15, 2010 8:25 pm

Chances are if is a fitting with low voltage lamps and a transformer in it then your electrician has not taken into account the surge on a circuit containing a transformer. Get him back and subject to the maximum EFLI values being acceptable he needs to change the MCB to a C type to overcome this problem. If its the rcd that is tripping chances are he has pinched a cable or something when installing it.

Nick

ban-all-sheds · Posted: Sat Jan 16, 2010 2:17 am

sparkydude wrote:

If its the rcd that is tripping chances are he has pinched a cable or something when installing it.

kevinyork wrote:

It resets ok

Who's the regular here with the animated GIF smiley of a dude in a hat slowly shaking his head?

sparkydude · Posted: Sat Jan 16, 2010 6:26 am

Chances are that as expected Ban all Sheds will give a sarcastic good for nothing unhelpful answer to a question he has no real knowledge about. The OP has not come back to confirm if it is an RCD or MCB yet you jump on the bandwagon AGAIN to criticise the oppinons of a tradesman . Who is to say the rcd is not faulty if it actualy is an RCD. If you cannot post a helpful reply to the OP question may i kindly suggest you keep your sarcasm to yourself.

Jacobssi · Posted: Sat Jan 16, 2010 8:14 am

What is elfi?

PrenticeBoyofDerry · Posted: Sat Jan 16, 2010 9:17 am

Jacobssi wrote:

What is elfi?

You mean EFLI
Earth Fault Loop Impedance

ban-all-sheds · Posted: Sat Jan 16, 2010 11:28 am

sparkydude wrote:

The OP has not come back to confirm if it is an RCD or MCB yet you jump on the bandwagon AGAIN to criticise the oppinons of a tradesman .

The OP has not come back to confirm if it is an RCD or MCB yet you have decided, if it is an RCD, to criticise the work of a tradesman.

Quote:

Who is to say the rcd is not faulty if it actualy is an RCD.

You, as in "If its the rcd that is tripping chances are he has pinched a cable or something when installing it", rather than "If its the rcd that is tripping chances are that it is faulty".

Quote:

If you cannot post a helpful reply to the OP question may i kindly suggest you keep your sarcasm to yourself.

I'm not sure how helpful your reply was to tell the OP that if it's an RCD that's tripping it's probably due to an intermittent earth fault when you think that the RCD might be faulty.