Discuss 18th edition and the requirement to upgrade consumer units when electric hobs are replaced in the Electrical Forum area at ElectriciansForums.net

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Good morning

does anyone know about anything in the 18th edition and the requirement to upgrade consumer units when electric hobs are replaced?

i had a customer ask me about it this morning.

Many thanks
Simon
 
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Wilko

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Arms
Esteemed
Hi Simon and Welcome to the Forum :) .
No changes to fixed wiring are required by BS7671 when appliances are replaced. However, the detail here is the new cooker’s manufacturer may state something in their installation instructions that needs to be considered.
 
Considered maybe, but manufacturers instructions are guidance only and do not have to be followed, especially when they are wrong, which quite surprisingly is quite often.
 

Charlie_

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Arms
I am going to replace a consumer unit this afternoon thanks to an induction hob being installed..
The extra earth leakage on the installation from the hob causing the RCD incomer to trip..
So they may be recommending a cu change based on this kind of scenario
 

littlespark

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Arms
Esteemed
I am going to replace a consumer unit this afternoon thanks to an induction hob being installed..
The extra earth leakage on the installation from the hob causing the RCD incomer to trip..
So they may be recommending a cu change based on this kind of scenario
So what’s going to stop the hob tripping it’s circuit Rcbo after the CU change?
 

littlespark

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Arms
Esteemed
Give me a break, @Pete999
I was at a wedding on Saturday and I think the alcohol consumption exceeded my recommended daily intake by a week or two.

Emergency shopping on Saturday morning when I realise my “good” shoes were a size and a half too small? Don’t know how that happened when my suit still fits.
 

littlespark

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Arms
Esteemed
It was a strange wedding. Bride is one of my wife’s old school friends with 2 teenage kids and groom is 10 years younger. Groom is in a band too, soo he spent more of the night on the stage rather than on the floor speaking to guests.

Best laugh was just after the ceremony when new husband and wife departed to the romantic tones of AC/DC, “Highway to Hell”
 
D

Deleted member 26818

Considered maybe, but manufacturers instructions are guidance only and do not have to be followed, especially when they are wrong, which quite surprisingly is quite often.
Actually, some MIs do have to be complied with.
Just about anything to do with CUs.
If the MIs say you need 100A main switch and 100A RCDs, then that’s what you have to have.
 
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