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Wiring Electric Water Heater - 10-3 from Panel, White Wire?

Wiring Electric Water Heater - 10-3 from Panel, White Wire?

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  #1  
Old 06-12-13, 05:57 AM
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Wiring Electric Water Heater - 10-3 from Panel, White Wire?

I've seen multiple posts on similar questions, but just for my clarification your patience is appreciated.
I am replacing a gas water heater with an electric (Whirlpool 50 Gal). There is an existing 10-3 wire from the panel, connected to a 30 Amp, 2 pull breaker. This runs to a junction box 3 feet from the WH. The WH has only Red and Black wires, with a ground. What do I do with the white wire? Panel is an old Federal Pacific (1972) (No money in budget to upgrade panel) (PA resident)
Thanks in advance.
Tired of cold showers.
 
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  #2  
Old 06-12-13, 06:05 AM
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Just put a wire nut on the white wire and push it into the box. You really only need 10/2, but since you have 10/3, no need to replace it.

The white wire in the panel can either be connected to the neutral bar with the other white wires or can be capped. Doesn't matter.
 
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Old 06-12-13, 06:16 AM
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I almost forgot, welcome to the forums!
 
  #4  
Old 06-12-13, 06:48 AM
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Thanks...

Thanks for the welcome, and the response.
This DIY thing, when 240 volts is involved, can get kinda tricky.
So... leave the white wire connected in the panel.
Cap the white wire in the junction box.
Connect the black wires together. Connect the red wires together. Connect the ground wires.
Hold breath. Flip breaker back on. Take hot shower in a few hours.
Right?
 
  #5  
Old 06-12-13, 07:15 AM
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That's right.......and remember...... It is your fault
 
  #6  
Old 06-12-13, 09:12 AM
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I am replacing a gas water heater with an electric (Whirlpool 50 Gal)...
Tired of cold showers.
You've already decided to do this, so I hope it gives you the result you're hoping for. That said, no electric water heater can come close to matching the low cost and rapid recovery time of the same size gas water heater. In fact, converting to gas often has the advantage of allowing the use of the size smaller heater.

What was wrong with the heater you're replacing, and why did you decide to install an electric one instead? I'm just curious.
 
  #7  
Old 06-12-13, 11:14 AM
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One other important tidbit... Be sure to let the water heater fill up before turning on the breaker. An empty water heater will burn out the heating elements rather quickly.
 
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