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Ground Wires and 240 Volt Circuits


By Dave Rongey - Summary:

How and Where to Connect Ground Wires on 240 Volt Circuits: The ground wire must be attached where there is a ground terminal or connection on all devices, which should be present on the 4-wire 240 volt receptacles that you are installing.

Wiring the Ground Wire for a 240 Volt Circuit

Electrical Question: I’m attempting to wire several 3 wire receptacles to a 4 wire 240v circuit.

Thanks a lot! Alexis

This Electrical Wiring Question came from: Alexis, a Homeowner from Santa Cruz, California.

Dave’s Reply:
Thanks for your Electrical Wiring Question Alexis.

How to Connect Ground Wires on 240 Volt Circuits

  1. The ground wire is the most important wire in any home electrical wiring circuit.
  2. The ground wire should be bonded with all other ground wires and bonded to any metal junction box or enclosure.
  3. The ground wire must also be attached where there is a ground terminal or connection on all devices, which should be present on the 4-wire 240 volt receptacles that you are installing.
  4. Many times the ground terminal is identified with a green screw.

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