Hello:
Is there any problem with using a larger gauge wire, say 8, for an electric water heater on a dual pole 30amp breaker? That wire is already run and I didn't want to run a new one.
Thanks.

First, how do you know the cable is an 8 AWG cable? Did you look at the cable, it should be marked with its size on the sheath.

Now to answer your question, no, there are no problems using a larger cable gauge as long as the connections are made properly.

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Originally Posted by donf

First, how do you know the cable is an 8 AWG cable? Did you look at the cable, it should be marked with its size on the sheath.

Now to answer your question, no, there are no problems using a larger cable gauge as long as the connections are made properly.

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Thanks Don, the sheath has it marked as 8.

Any larger wire can be used. Make sure they are the same class and temp rating.