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Topic Title: Job tomorrow.. Help!
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Created On: 15 February 2013 05:39 PM
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 15 February 2013 05:39 PM
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Westonelectrical

Posts: 85
Joined: 26 November 2012

Job tomorrow as a favour for my dad.. Existing installation 30+ years old, 3036 fuses, customer doesn't want to have walls chopped etc, dads fitting a complete new bathroom including new electric shower... Shower is wired in 6mm but coming out the isolater is 2.5... Replacing the 2.5 for 6mm and sticking a rcd box (shower pack) at the bored.... Now there is a light in the bathroom she wants 6 down lights instead... How would you suggest I protect the lights, but the existing lighting circuit is pretty much nackerd?.?
 15 February 2013 05:58 PM
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markespark

Posts: 87
Joined: 27 November 2010

RCD spur off the ring ?
 15 February 2013 06:16 PM
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Avatar for OMS.
OMS

Posts: 19471
Joined: 23 March 2004

Knackered how ? - and an RCD spur would solve most of your issues anyway as long as the existing bonding is up to scratch.

Regards

OMS

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Failure is always an option
 15 February 2013 08:08 PM
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Westonelectrical

Posts: 85
Joined: 26 November 2012

No bonding... Rcd spur?
 15 February 2013 08:13 PM
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peteTLM

Posts: 3122
Joined: 31 March 2005

Put a 2 way RCD board in, 1 new shower, 1 new lighting cct for the bathroom. Henley block. Fix bonding.

If you go off the old board and the old installation is a pile of, you wil then be involved in a can of worms.
New board removes you from the existing installation.

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Lack of planning on your part doesn't make it an emergency on mine....

Every man has to know his limitations- Dirty Harry
 15 February 2013 08:28 PM
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Westonelectrical

Posts: 85
Joined: 26 November 2012

Was thinking of putting rcd box out side bathroom but lady doesn't want it
 15 February 2013 09:36 PM
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Rulland

Posts: 452
Joined: 11 April 2008

What lady wants, and what regs say!............................ just walk away and allow the local electrical village idiot do it, unfortunately it happens all the time these days!.

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Those who make no mistakes do very little work!!......
 15 February 2013 10:35 PM
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Westonelectrical

Posts: 85
Joined: 26 November 2012

True Rulland, very true
 16 February 2013 12:05 AM
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stateit

Posts: 2132
Joined: 15 April 2005

6mm from the isolator if it's 2.5mm to the isolator won't help.

If it's 6 mm to the isolator from the CU then extend that 6mm into the new RCD 2-way shower unit next to the original board.

Then take the existing lighting circuit from the old board and extend it into a 6A (if applicable, it probably is) MCB in the RCD'd shower unit as well.

But you knew that anyway, didn't you

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S George
http://www.sg-electrical.com
 16 February 2013 10:46 AM
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Avatar for dg66.
dg66

Posts: 1667
Joined: 11 January 2008

Fit ELV down lights fed via SELV transformers,no RCD protection required.Use the departures box on the cert to show a better level of protection than using an RCD.

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Regards

Dave(not Cockburn)
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