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DIY Forum >> Electrical Questions >> Electric oven https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1098731535 Message started by Jim on Oct 25th, 2004, 8:12pm |
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Title: Electric oven Post by Jim on Oct 25th, 2004, 8:12pm Hi all Can anyone tell me what the maximum Kw oven I can connect to a 13 amp supply. Thanks |
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Title: Re: Electric oven Post by Lectrician on Oct 25th, 2004, 8:33pm 2.9kw |
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Title: Re: Electric oven Post by HandyMac on Oct 25th, 2004, 8:50pm Very rough calculation: Wattage = Volts x Amps So, wattage = 240 x 13 = 3120 = 3.12 kW However that doesn't take into consideration things like power factor (which I did 30 years ago on my electrics course and have forgotten all about!), and you would never run the fuse at the full rating, so 3.12 kW is the maximum power you could expect. However, 230 x 13 = 2.99 kW so that's more likely to be your maximum. The previous answer of 2.9 kW provided by Lectrician is definitely in the right ball park and I wouldn't choose to disagree with it - all I am doing is providing a rough and ready calculation which may be handy to give you an idea based upon fuse value. Andrew |
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Title: Re: Electric oven Post by plugwash on Oct 25th, 2004, 8:56pm generally power factor is not an issue on heating and lighting (ie its so damn close to 1 it can be neglected) |
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Title: Re: Electric oven Post by HandyMac on Oct 25th, 2004, 9:40pm wrote on Oct 25th, 2004, 8:56pm:
Yeah, I thought that was probably the case, but I'm relying on very distant memory. Isn't it motors and the like where power factor comes into play? Something with a large reactive or capacitive load if I remember correctly. I'd love to do a refresher course for my OND Electrical Engineering - I know when I did all this stuff it was as boring as hell working out phase angles on a slide rule etc, but now I think I'm more inclined to take an interest. And obviously pocket calculators would make a bit of a difference :) Andrew |
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Title: Re: Electric oven Post by HandyJon on Oct 25th, 2004, 9:51pm working out phase angles on a slide rule etc Careful now Andrew, you're showing your age! :) |
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Title: Re: Electric oven Post by L.Spark on Oct 26th, 2004, 12:13am And please remember to correctly identify the voltage range as 230V :D |
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Title: Re: Electric oven Post by L.Spark on Oct 26th, 2004, 12:15am wrote on Oct 25th, 2004, 8:56pm:
Yeah unity, didnt know cookers needed any power factor correction tbh ::) Quote:
haha lol |
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Title: Re: Electric oven Post by Lectrician on Oct 26th, 2004, 7:50am Many items of kit incorporate PF correction to bring the PF close to unity, but resistive loads such as filament lamps and heating elements will not affect the PF to a noticable degree. Sorry, my answer was abbrupt. 2.9kW is in my head for a 13amp fuse!! |
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Title: Re: Electric oven Post by supersparky on Oct 26th, 2004, 8:31am yup i make it 2990w must use 230v in your calculations hm! ss |
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Title: Re: Electric oven Post by HandyMac on Oct 26th, 2004, 11:38am wrote on Oct 26th, 2004, 8:31am:
I know - to be honest I don't do leccy calcs all that often. When I'm putting plugs on I instinctively know what size is needed. Anyway, 230v may be the RMS voltage but from what I recall it can vary quite a bit from there (is it +10%, -6%?). Andrew |
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Title: Re: Electric oven Post by Jim on Oct 26th, 2004, 6:51pm Thanks for the replies but she who must be obeyed has picked a gas oven now so no problems anymore. Cheers |
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Title: Re: Electric oven Post by L.Spark on Oct 26th, 2004, 7:24pm wrote on Oct 26th, 2004, 11:38am:
And that is why your not fired ;) ;D ;D ;D Quote:
Yes, for now at least, in a few years it will change to ±10% :) Quote:
no problem, gas is easier to cook with anyway.. |
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