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Old 10-13-2010, 08:41 AM   #1
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electric water heater rewire


In the rewiring of 50gal water heater replacing the 10-2 copper with 10-3 copper wire. the water heater had only two connecting wires; black and red. The white wire from the original 10-2 going to the heater was attached to the grounding screw noted on the top of the heater. In replacing with the 10-3 should I again attach the wht. neutral wire to the grounding screw and run the bare ground to a cold water pipe?

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Old 10-13-2010, 08:48 AM   #2
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electric water heater rewire


A two conductor cable + ground is all that is needed for a water heater. You do not need a neutral, just two hots. The white will get re-identified as a hot with black or red tape or magic marker.

I do not know how yours was functioning with a hot connected to ground.

Do not make any connections between a water line and the wiring for grounding.

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Old 10-13-2010, 09:07 AM   #3
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electric water heater rewire


so the wiring for the electric water heater is red to red, black to black and white to ?
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Old 10-13-2010, 09:15 AM   #4
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electric water heater rewire


There is no white used on a straight 240 volt unit. The white in the cable is used as a hot conductor and is re-marked to show its new usage.
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Old 10-13-2010, 11:11 AM   #5
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electric water heater rewire


Cap off the white, and connect the bare to the ground screw on the water heater.
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Old 10-13-2010, 12:18 PM   #6
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electric water heater rewire


Why are you replacing 10-2 with 10-3?
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Old 10-13-2010, 05:06 PM   #7
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electric water heater rewire


black to black
white to red
bare to the ground
Mark the white red with a marker or electrical tape.

Just because it is white does not mean it has to be a neutral.

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