I need to install wiring for a whirlpool induction cooktop model gci3061x but don't know what gauge wire to use. The booklet that came with it doesn't say.

What is the wattage of the unit? It will probably say in kW.

I got it right from their web site.

Quote:

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Electrical Requirements
40 Amps. 60 Hz. 240 V.

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You can use 8/2NM cable on a two-pole 40A breaker.

Are you prepared/experienced enough to install this circuit, or are you having someone do it?

Yes I am experienced enough to install it. Thanks to the person who gave me the right wire to use!