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peterdevlin1 04-26-2012 02:19 PM

Wiring an oven in 2.5?
Is there anything that actually stops me from wiring a 2.8kW oven in 2.5mm twin and earth? Done the cable sizing calculation and voltage drop and it's all legit, am I missing something though? I know a few people have said it better to wire it in 4mm/6mm incase a differemt cooker etc is ever put in, but is it dangerous for it to be wired in 2.5 for example could the cable overheat?

bob22 04-26-2012 02:20 PM

Your location? Sounds like not in the US?

peterdevlin1 04-26-2012 02:21 PM

UK scotland

JulieMor 04-26-2012 02:29 PM

You need to find out conduit fill related to conductors. In the US, there are tables that specifically state how many conductors with a particular insulation can be installed in each size conduit. See if you can find the UK version of that.

peterdevlin1 04-26-2012 02:31 PM

Im not using conduit though? It's installed under a floow

JulieMor 04-26-2012 02:39 PM

So it's just a matter of planning for the future? If so, I'd say it's a cost vs. will you ever need a larger amperage circuit. If you've done the load calcs and you're sure you're good on the wire size and insulation, then all you need to decide is if you want to install larger wire in case you ever upgrade your oven.

When I first started my apprenticeship in 1974, we were installing 60A circuits for electrical ovens. I just replaced my gas oven with electric and only needed a 30A circuit. So in the future, your next oven could be even more efficient and you could find even a larger oven wouldn't require an electrical upgrade.

Sounds like it's a personal choice.

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