what wire gauge should i use on a 120volt line under ground that is 500 feet long, for a 150 watt light?
Question by : what wire gauge should i use on a 120volt line under ground that is 500 feet long, for a 150 watt light?
Best answer:
Answer by Dr. Spark
Calculating one min. please.
There will be a 8.2% for #6 12.3% for #8 and a 29.2% for #10. I would avise using #6 for the hot derate the netrual by one for a #8 and use a #10 ground. This is rated for a 20 amp circuit at 500feet undergrond in pvc pipe. I would not advise sizeing it for actual light amperage you will never be able to use it for anything else and it will always be running warm. Good Luck.
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