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A #1 copper wire with an insulation rating of 90 degrees C is rated at 140 amps.

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Q: What size wire is needed to feed a 125 amp sub panel from a 200 amp panel less than 200 wire feet away?
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Related questions

What size service cable for 100 amp main panel 100 feet away?

20Sqmm


What gauge wire to use for direct burial for a garage that is 400 feet from your house?

Depends on the size of the sub-panel in that garage. If you are installing a 60 amp sub-panel 400 feet away from the main service panel then use AWG # 4.


Can you use aluminum service cable to feed a sub panel?

Yes, as long as it has the necessary ampacity for the load and is properly fastened at each terminal. For example, we have a 4/0 aluminum cable feeding our 200 A subpanel 120 feet away.


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How many amps can a 8 gauge wire run coming from the ditribution panel to the sub panel 25 feet away?

A #8 copper wire with an insulation factor of 75 or 90 degrees C is rated at 45 amps.


How many grounding rods are needed for 200 amp service?

It depends on where the sub panel is situated. If the panel is under the same roof as the main distribution panel then no ground rods are needed on the sub panel. If the sub panel is in a different building then a ground rod might be needed. There has been an electrical code rule change on this subject. Check with your local electrical inspector before installation so that it is done correctly.


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