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The ampacity of a # 10 copper wire with an insulation factor of 90 degrees C is 30 amps. All wire voltage ratings usually drop into two categories 300 volts and 600 volts. Home wiring drops into the 300 volt range and commercial, industrial, drops into the 600 volt range.

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14y ago
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9y ago

A #8, 90 degree C rated copper wire is rated at 45 amps, a #6 90 degree rated aluminium wire is rated at 55 amps.

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11y ago

25sqmm copper or 35 sqmm Al

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Q: What gauge wire for 240 volt at 40 amps?
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Related questions

What gauge wire for 240 volt 25 amp 50 ft?

A #6 copper conductor will limit the voltage drop to 2% or less when supplying 50 amps for 80 feet on a 240 volt system.


What size wire for 10kw 240 volt?

10 mm2 cross section should be sufficient (#6 wire?)


What is the ampere rating of a 8 gauge wire at 240 volts?

5 amps


What gauge wire for aluminum 240 volts 20 amp 200ft?

A #6 aluminum conductor will limit the voltage drop to 3% or less when supplying 20 amps for 200 feet on a 240 volt system.


What gauge wire for 240 volt 30 amp 55 ft?

10 gauge will work fine.


What wire size 240 volt 21 amps 150 foot run?

A #10 copper conductor will limit the voltage drop to 3% or less when supplying 21 amps for 150 feet on a 240 volt system.


What gauge wire would I need for 2500 feet for 240 volts and 0.4 amps?

A #14 wire will do the job.


What is ampere rating of 10 gauge wire at 120 volts and at 240 volts?

30 amps.


What size copper wire do you need for 240 volts 16 amps at 150ft?

10 gauge


What wire gauge is needed to carry 150 amps at 240 volts?

At the service entrance you will need AWG 1/0 gauge.


How do you wire a 120 volt gfci into a 240 volt three wire?

You can't. The 120 volt GFCI is probably just a 2-wire (hot, neutral and ground) You would have to run a new 3-wire (2 hots, neutral and ground). The two hots are how you get the 240 volts (120+120=240). Also you must make sure the wire is gauged properly. #10 wire for 30 amps, #12 wire for 20 amps, etc.


What gauge wire would you need 5600 watts 240 volts 23.3 amps?

AWG # 10.