15.9kw Electric cooker
Discussion
Anyone care to double check my figures for me? I've just picked up a 15.9kw electric range cooker and need my figures double checking before I connect it up.
Allowing for diversity (10 amps + 30% + 5 amps due to socket) would give 22.7 amp loading. The cooker circuit is already on a 32 amp mcb with 6mm t&e and its clipped direct with a total run of less than 0.5 metre.
Sound about right?
Allowing for diversity (10 amps + 30% + 5 amps due to socket) would give 22.7 amp loading. The cooker circuit is already on a 32 amp mcb with 6mm t&e and its clipped direct with a total run of less than 0.5 metre.
Sound about right?
My cooker is similar I think (5 ring halogen, 2 ovens and a grill).
Ours tripped when we had a houseful (Christmas or reasonably sized entertaining) due to the diversity calcs going out of the window and the cable the previous owners had used being waaaaaaay undersized for the very long run to the consumer unit (0.5m is very short. Is your consumer unit that close to the cooker?). We now have a 50A circuit with 16mm t&e.
If I were you I would calculate things as if it were running everything at full power.
And if anyone ever needs any 16mm t&e...
Ours tripped when we had a houseful (Christmas or reasonably sized entertaining) due to the diversity calcs going out of the window and the cable the previous owners had used being waaaaaaay undersized for the very long run to the consumer unit (0.5m is very short. Is your consumer unit that close to the cooker?). We now have a 50A circuit with 16mm t&e.
If I were you I would calculate things as if it were running everything at full power.
And if anyone ever needs any 16mm t&e...
Murph7355 said:
My cooker is similar I think (5 ring halogen, 2 ovens and a grill).
Ours tripped when we had a houseful (Christmas or reasonably sized entertaining) due to the diversity calcs going out of the window and the cable the previous owners had used being waaaaaaay undersized for the very long run to the consumer unit (0.5m is very short. Is your consumer unit that close to the cooker?). We now have a 50A circuit with 16mm t&e.
If I were you I would calculate things as if it were running everything at full power.
And if anyone ever needs any 16mm t&e...
This one has 4 solid plates, 2 ovens, a grill and griddle. It's extremely unlikely to be using everything at the same time. Ours tripped when we had a houseful (Christmas or reasonably sized entertaining) due to the diversity calcs going out of the window and the cable the previous owners had used being waaaaaaay undersized for the very long run to the consumer unit (0.5m is very short. Is your consumer unit that close to the cooker?). We now have a 50A circuit with 16mm t&e.
If I were you I would calculate things as if it were running everything at full power.
And if anyone ever needs any 16mm t&e...
Lopey said:
This one has 4 solid plates, 2 ovens, a grill and griddle. It's extremely unlikely to be using everything at the same time.
To be fair mine was tripping out with something like just one oven and 3 rings on full...previous owners were an older couple who no doubt didn't entertain much.Christ knows who they got to wire it up as it was bodgetastic.
My sparks was taken aback at how much current this bad boy draws on full.
I find it very easy to have all bar the grill on when cooking for 10 or so. With such a short run for the cable if it were me I'd get it set up to run the max jic - it's very inconvenient when you have loads of hungry guests round and the cooker keeps tripping
(You might want to check what size the house fuse is though...I think they're typically 60A or 80A but can be upgraded..mine's 100A).
I've got a rangemaster pro 90cm range with induction hob. It's on a 40 odd amp mcb.
Rangemaster have pretty good docs which provide some options here. http://www.rangemaster.co.uk/rangemaster-owners/fa...
Rangemaster have pretty good docs which provide some options here. http://www.rangemaster.co.uk/rangemaster-owners/fa...
32A is not fine if it really is 15.9kW Single Phase as that is a 69A load.
That is huge, however it seems that rangemaster do provide product with such load.
To the book, you should be installing a 80A MCB for that with a 25/35mm multicore cable (depending on install method).
I would probably take a pragmatic approach and suggest a 63A MCB in which case you may be able to reduce to a 16mm cable dependant again on the installation method.
I am slightly confused by your mention of a socket, this needs to be on a dedicated circuit.
That is huge, however it seems that rangemaster do provide product with such load.
To the book, you should be installing a 80A MCB for that with a 25/35mm multicore cable (depending on install method).
I would probably take a pragmatic approach and suggest a 63A MCB in which case you may be able to reduce to a 16mm cable dependant again on the installation method.
I am slightly confused by your mention of a socket, this needs to be on a dedicated circuit.
D1bram said:
I am slightly confused by your mention of a socket, this needs to be on a dedicated circuit.
There's no info, even in the Rangemaster installation instructions, about fuse or MCB ratings - only max cable sizes. Looks like they don't do electric now - it's either ceramic or induction. The video pre-installation guide says ceramic needs 32A and induction 45A. As the OPs cooker is similar rating to the induction one then 45A seems sensible so that'll need 10mm cable from the consumer unit to the switch.
D1bram said:
32A is not fine if it really is 15.9kW Single Phase as that is a 69A load.
That is huge, however it seems that rangemaster do provide product with such load.
To the book, you should be installing a 80A MCB for that with a 25/35mm multicore cable (depending on install method).
I would probably take a pragmatic approach and suggest a 63A MCB in which case you may be able to reduce to a 16mm cable dependant again on the installation method.
I am slightly confused by your mention of a socket, this needs to be on a dedicated circuit.
That is huge, however it seems that rangemaster do provide product with such load.
To the book, you should be installing a 80A MCB for that with a 25/35mm multicore cable (depending on install method).
I would probably take a pragmatic approach and suggest a 63A MCB in which case you may be able to reduce to a 16mm cable dependant again on the installation method.
I am slightly confused by your mention of a socket, this needs to be on a dedicated circuit.
From this post, it is quite obvious you lack knowledge of circuit design.
Initforthemoney said:
D1bram said:
32A is not fine if it really is 15.9kW Single Phase as that is a 69A load.
That is huge, however it seems that rangemaster do provide product with such load.
To the book, you should be installing a 80A MCB for that with a 25/35mm multicore cable (depending on install method).
I would probably take a pragmatic approach and suggest a 63A MCB in which case you may be able to reduce to a 16mm cable dependant again on the installation method.
I am slightly confused by your mention of a socket, this needs to be on a dedicated circuit.
That is huge, however it seems that rangemaster do provide product with such load.
To the book, you should be installing a 80A MCB for that with a 25/35mm multicore cable (depending on install method).
I would probably take a pragmatic approach and suggest a 63A MCB in which case you may be able to reduce to a 16mm cable dependant again on the installation method.
I am slightly confused by your mention of a socket, this needs to be on a dedicated circuit.
From this post, it is quite obvious you lack knowledge of circuit design.
I'm degree educated in Electrical and Electronic Engineering but that doesn't qualify me to wire up this cooker, I get diversity too, but....If you switched several things on with this at once will it not just trip the MCB repeatedly? Or will the cooker itself somehow try to balance the load? It does all seem quite excessive I guess but I have two single ovens at home both rated around 15A max load, so 30A total if they were running flat out - I guess this could happen if I turn them both on and press the quick heat button so it uses all the elements. If I had an electric hob on the same circuit then I probably only need to turn on one ring and click, visit to the MCB box needed?
On the flip side provided you don't turn everything to full blast at once then I suspect it will be okay the majority of the time as each item will be requiring short bursts of electric to maintain the temperature demanded by the thermostat and probably not all at the same time.
It would be helpful though if the cooker manufacturer just said in their documents that it needs to be connected to a dedicated supply fused at this many amps
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