Electrical Wiring in the Home/240 Volt Electricity


I had a water heater replaced by a reputable plumbing firm. The installer told me that it is designed for 240 volts (like the old one), but it is only receiving 110 volts. According to him, the heater will take longer to replenish the hot water, because of this issue. When I look in the breaker box, I see that the circuit has a double pole breaker, like the ones that feed my other 240 volt appliances. There is also an on-off switch in the water heater compartment. Can you give me some ideas as to where the problem might be? Thank you for your generous help.

It will NEVER replenish at 120 because thete is no circuit.
If, as you say, there is a 2-pole breaker, then either the breaker is not letting one leg through or the switch at the heater is partially open.
...of course this assumes the wiring is intact..
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Electrical Wiring in the Home

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Robert Wilber


Licensed Philadelphia electrician serving Delaware, Chester, Montgomery and Philadelphia County in Pennsylvania. I install and repair residential, commercial and industrial wiring and lighting. Troubleshooting and repair of problems that stump other people is my favorite. I am willing to help people figure out why things don`t work. I understand motor controls, transformers and machine wiring. I do not teach basics to novices or do free design work.


Experience in the area I have 44 years experience in residential, commercial and industrial electrical construction and repair, 480 volts and below. This is not to be confused with one week repeated two thousand times.

44 years experience in residential, commercial and industrial electrical construction and repair

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