Wiring a 240V Appliance: Difference between revisions
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{ | {{Hint|There are 2 distinctions - old appliances, and pure 240V systems - which used 3 wire plugs. The former is no longer allowed}} | ||
*This one has a ground and 2 hots. With 3 wires, it means it has 240v only, but not 120v. [https://youtu.be/zzk7QUKqfEs?t=400] | *This one has a ground and 2 hots. With 3 wires, it means it has 240v only, but not 120v. [https://youtu.be/zzk7QUKqfEs?t=400] | ||
Revision as of 07:06, 27 April 2024
Hint: There are 2 distinctions - old appliances, and pure 240V systems - which used 3 wire plugs. The former is no longer allowed
- This one has a ground and 2 hots. With 3 wires, it means it has 240v only, but not 120v. [1]
- See Spruce for difference between 3 wire and 4 wire installation [2]
- But - older appliances which were 120/240v, not pure 240 - also had a 3-wire cord, and they combined ground with neutral. But that is no longer allowed as it appears to be less safe - for example if in a non-fault condition, the person has lower resistance than the ground. See [3]
- If you only have a 2 conductor + bare ground, mark the bare ground as a neutral and run it to ground. [4]
- Does a 3-wire 240v circuit have a grounded neutral, or a ground that is neutralized?