Cooker power supply rating and cable
Discussion
We have a new Rangemaster dual fuel twin oven range cooker which we bought to replace a gas one which had croaked, as we liked the idea of fan-ovens.
The gas installer couldn’t proceed as he was not sure the power supply was of the correct size for the 11kw potential all-on consumption so asked us to get an electrician involved.
I’ve scoured the net and there are conflicting conclusions… some say for 11kw you’d need 10mm cable, others say 6mm (which we have) is sufficient.
The electrician who came thinks we need 10mm but is happy to be led by other reliable evidence as curiously Rangemaster themselves say 6mm is fine in their FAQ for an induction or ceramic hob model (which would presumably draw more power than a gas hob), but aren’t specific on which exact model.
Upgrading to 10mm would be disruptive so we would just swap the cooker for a gas one, but thought I’d canvass some views before doing so.
Any thoughts gratefully received!
The gas installer couldn’t proceed as he was not sure the power supply was of the correct size for the 11kw potential all-on consumption so asked us to get an electrician involved.
I’ve scoured the net and there are conflicting conclusions… some say for 11kw you’d need 10mm cable, others say 6mm (which we have) is sufficient.
The electrician who came thinks we need 10mm but is happy to be led by other reliable evidence as curiously Rangemaster themselves say 6mm is fine in their FAQ for an induction or ceramic hob model (which would presumably draw more power than a gas hob), but aren’t specific on which exact model.
Upgrading to 10mm would be disruptive so we would just swap the cooker for a gas one, but thought I’d canvass some views before doing so.
Any thoughts gratefully received!
it’s allowed to use diversity for a cooker - it’s assumed everything wouldn’t be on at the same time.
Ie: https://www.tlcdirect.co.uk/Book/6.5.2.htm#:~:text...
but that article explains why you might want to think about it a bit more.
Ie: https://www.tlcdirect.co.uk/Book/6.5.2.htm#:~:text...
but that article explains why you might want to think about it a bit more.
I’ve got a Rangemaster Kitchener 100 dual fuel that was installed in the Spring. It’s on a 6mm cable. The technical data for it states its total electrical load is 7.4kW. See page 38
https://www.rangemaster.co.uk/sites/default/files/...
Which exact model do you have? Not confusing the total power rating of the gas burners with those of the ovens? My gas burners have a total rating of 10.9kW.
https://www.rangemaster.co.uk/sites/default/files/...
Which exact model do you have? Not confusing the total power rating of the gas burners with those of the ovens? My gas burners have a total rating of 10.9kW.
Thanks very much folks, useful info to research further there.
Diversity is a whole new world for me (aside from the dance group or section in our company’s HR manual), will see what the electrician has to say.
Mine is a Rangemaster 110 Professional Deluxe which has a max electrical load of 11kw but it’s hard to imagine using everything at once.
Diversity is a whole new world for me (aside from the dance group or section in our company’s HR manual), will see what the electrician has to say.
Mine is a Rangemaster 110 Professional Deluxe which has a max electrical load of 11kw but it’s hard to imagine using everything at once.
Robertb said:
Thanks very much folks, useful info to research further there.
Diversity is a whole new world for me (aside from the dance group or section in our company’s HR manual), will see what the electrician has to say.
Mine is a Rangemaster 110 Professional Deluxe which has a max electrical load of 11kw but it’s hard to imagine using everything at once.
From the online manual the induction version has a load of around 15.35 kW (excluding induction boost use) so the nominal braker rating would be 30A (10+ (0.3x(15350/230)) assuming no auxillary socket on the cooker outlet. However with such a large range a 40A breaker at least would be more sensible to avoid tears on Christmas Day.Diversity is a whole new world for me (aside from the dance group or section in our company’s HR manual), will see what the electrician has to say.
Mine is a Rangemaster 110 Professional Deluxe which has a max electrical load of 11kw but it’s hard to imagine using everything at once.
Whether the cable needs to be 6mm or 10mm depends on the run length & how the cable is fixed & only your sparky can calculate that.
If your electrician knows the load and route, but can’t work a size out, he is incompetent.
The manufacturer can’t tell you the cable size, other than the final connection capacity, as they don’t know the cable installation method, the protective device rating or the distance to the switch/ connector.
The manufacturer can’t tell you the cable size, other than the final connection capacity, as they don’t know the cable installation method, the protective device rating or the distance to the switch/ connector.
Edited by Rough101 on Friday 5th July 10:49
Edited by Rough101 on Friday 5th July 10:59
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