16

I bought a cooktop which has 3 wires:

  • Black
  • Red
  • Green

The wiring in my home is 4 wires:

  • Black
  • Red
  • White
  • Bare

I saw the instruction for 3-wire to 4-wire connection, it states to leave the white neutral wire alone.

Is it safe to do so? Without neutral wire, how the circuit could be completed?

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Machavity
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movila
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2 Answers2

14

You go by the instructions(if listed by UL/CSA). They can override local or NEC rules usually.

If a 240volt device (stove) does not use 120 volt (clocks, fans), it does not need to have a neutral wire.

So you can cap/wire nut the neutral.

isherwood
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crip659
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2

Yes it's fine.

Current flows out through one hot conductor and back through the other (with the direction reversing frequently).

Traditionally in north America it was/is common to have equipment where the high power stuff was 240V, but the controls were 120V so a neutral wire was needed, but if the equipment is designed with 240V control equipment there is no need for a neutral.

Peter Green
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