New oven - CU upgrade?

[xAlex]

Hi All,

assuming a new oven was replacing an old one of the same energy rating, and the cable/cooker connection/isolator were adequate for the old, so should be OK for the new. The CU contains ceramic re-settable fuses (with the little red pop-out button), and no RCD protection.

Could you connect the new oven on a like-for-like basis or would you
need to retro-fit some kind of RCD protection to comply with 17th Regs?

Thanks,

Alex

 

[EdwardCurrent]

Hello.
To comply with the 17th your cables would prob require 'additional protection' RCD, however, I think that regulations are primarily for the design and installation of 'new' circuits. You are not changing any of the circuits design etc, so this would probably be a Code 4 ( non compliant with bs7671) but not requiring any action.

Ed

 

[Spark123]

I don't think you need to bother it as you are only replacing current using equipment.
Replacing current using equipment is maintenance, you don't even need to supply a certificate if one isn't requested, if the client demands one then you can use an MEIWC. The only time you need to worry about RCD protection when replacing current using equipment is when the manufacturers instructions specifiy it.

It is only when you start altering or adding to a circuit that you need to start worrying about the current regs, or carrying out PIRs.

 

[xAlex]

...cheers Spark + Ed

 

[ban-all-sheds]

assuming a new oven was replacing an old one of the same energy rating

Do you actually mean energy rating?

If you do then that's not the figure you need to use to check if the circuit is suitable.

 

[xAlex]

...power rating - kW, you know.

 

[davelx]

...power rating - kW, you know.

Yes, we guessed that was what you probably meant, but that was not the term you used, so we wanted to be sure you were looking at the correct information.

This is the reason why some of us seem to be very pedantic about use of terminology and language and try not to infer anything beyond what is actually written.

 

[xAlex]

...point taken.

 

[ban-all-sheds]

The energy rating of an oven is the mythical kWh figure that they publish to tell you how much electricity you use over the space of a year, or a day, or a month, or whatever, to carry out a standard activity like cooking a shop-bought pie, or drying a pair of wet socks - I dunno.

Whatever it is it's the same for all makes and models, the idea being that you can see which is the most efficient. The fact that the figure bears as much relation to reality as does the RPI "shopping basket" to the trolley you wheel up to the supermarket checkout each week, and is about as much use for knowing what circuit capacity is needed as would be the receptionist's bra size seems to have escaped the makers' attention.

If you had a 10MW electrode boiler and you ran it for 1 minute per day your average hourly consumption would be 7kWh.

But while it was running a 6mm² cable on a 30A breaker wouldn't quite hack it....

 

[xAlex]

...how did you know I wheel a trolley weekly and my bra don't fit?? Uncanny!

 

[ban-all-sheds]

I also know that you dribble in your pants and what you get up to with that webcam.

 

[xAlex]

Crap! I'm using ultimatehandyman.co.uk in future!