Generator To Transfe Switch Wire Gauge - Electrical - DIY Chatroom Home Improvement Forum

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Old 07-18-2012, 06:26 AM   #1
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Generator to transfe switch wire gauge

So I'm runnin the wire from my out side hook up to the transfer switch. This is a 5500 watt 30 amp generator. The wire is going to be 25 feet long. What gauge do I need. I've seen some tables where it looks like I need 4 gauge but others say I need 10. Which is right? Or are both wrong?


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Old 07-18-2012, 07:02 AM   #2
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You can use #10 gauge provided there is a 30 amp breaker permanently in the line, for example a small panel before the outdoor hookup (inlet; male receptacle).

You may choose to use heavier wire and matching hookup (#8 for 40 amps, or whatever) to plan for the future in case you decide to get a larger generator.


The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.

Last edited by AllanJ; 07-18-2012 at 07:14 AM.
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Old 07-18-2012, 07:13 AM   #3
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10 is all you need but if you ever plan on maybe going bigger you may want to run 6's. That next twistlock size up is 50a for a genny.
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Old 07-18-2012, 11:31 AM   #4
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Thanks .. Guess I'll run 6 just cause I want to only do this once
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gauge transfer switch

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