I recently purchase a ceramic hob cooker with a power rating of 12kw. I have worked out that it will need a 50amp fuse and a 10mm cable. As this is a 1960's house, i'm not sure if the wiring in the house will support the cooker. At present, i have a 100amp main circiut breaker in the consumer unit. Would you suggest i get the house re-wired? Also, what is the standard thickness or ampage of external cables that feed the consumer unit.
Hi don't forget regs allow for diversity in cooker supplies, onsite guide says:
first 10A of rated current , plus 30% of remainder plus 5A if socket incorperated in panel so your 50A is actually calculated as :
10+ (30% of 40) = 10+12=22A plus 5A if skt so max of 27A so standard 32A circuit is all required.
Agree all other comments of RFLighting
RFP/SP, Hi guys,
what would you use at cooker end as an isolator?,
would you really run a circuit for 50A? for a cooker!
Our ceramic hob / double oven cooker has been doing dinners for 14 for the last 3 years xmas without a problem on a 32A type b mcb on 6mm2 tw/cpc. thermostats mean only some rings will be on at once.
Using the on-site guide and regs is what sets us aside from the rest!
Sorry but why cost your customers more than necessary by using oversized cables with larger than required MCB which gives a lower level of protection?
IET have always given diversity allowance for domestic cookers, so why ignore best advice available?
see 8.4 page 160 of OSG, and table 1A page 96,
It states "A 30 or 32 A circuit is usually appropriate for a household or similar cookers of rating up to 15kW.
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