I just had a new oven installed that required a new 240-volt, 40-amp circuit. The installer used 6-gauge wire for the two hots, but smaller
12-gauge wire for the neutral and ground. Is the use of the smaller wire okay?
Yes
40 Amp ckt requires #10 for the equipment grounding conductor. Built-in oven may or may not require a Neutral connection, check the nameplate or install instructions. If it requires a Neutral, I would have gone full size (#8).
Jim
Yes.
No need. The heating elements would be 240V and thus not use a neutral. Other features such as lights, timer, clock, etc. are likely only 120V and thus do need the neutral, but certainly not a #8.
-- Doug Miller (alphageek at milmac dot com)
How come we choose from just two people to run for president and 50 for Miss America?
No. Refer to NEC, Article 250-95. The equipment ground must be #10 minimum.
He's probably OK on the neutral, though -- very doubtful that the 120V load (clock, timer, lights, etc) is anywhere near 20A.
-- Doug Miller (alphageek at milmac dot com)
How come we choose from just two people to run for president and 50 for Miss America?
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