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Electric Water Heater Wiring


By Dave Rongey - Summary:

Wiring in an existing water heater which has a red and black wire. Need to connect it to a white and black wire. Which wire goes where…


Electric Water Heater Wiring
Background: Ed, a Homeowner from North Branch New Jersey

Question: Wiring in an existing water heater which has a red and black wire. Need to connect it to a white and black wire. Which wire goes where?

Additional Comments: Very good website

Dave’s Reply:
Thanks for your electrical question Ed. I have provided the following links that lead to fully detailed information on this website that will assist you with your electrical question:
Electrical Wiring

Electrical Wire for the Home

For more information about 220 Volt Wiring Diagram
220 Volt Wiring Diagram

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2 Responses to “Electric Water Heater Wiring”
  1. Jamie says:

    I have a two water heater set-up with one 30 amp feed with two 10/2 between them that the plumber got his hands in. I was called to fix it and want a diagram to go by if anyone has done this before as I haven’t. Thanks

    • Dave Rongey says:

      Hi Jamie,
      If the location where the water heaters are requires two both units running at the same time then two separate 30 amp circuits will be required, if not then a Lead Lag relay should work. A Lead Lag relay is normally used when there are two motors used, such as for air conditioners, air compressors or vacuum units used in commercial or industrial installations. With this type of setup one is running and one is on backup, and they can be wired to have an alternating run schedule for even run time. A big factor in how the electrical circuitry is set up will also depend on how the plumber has the piping set up, and the reason for a two unit system.
      I hope this helps you get your water heater set up working.
      Dave


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