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depends entirely on amperage, or current. if it is for a thermostat it can be very small like 20-24 awg maybe even 30. 20 awg will be more than adequate for most hvac controls, if it is a 24v automotive system that's a whole nother story

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For a 24 volt DC circuit, you can use wire gauges ranging from 14 AWG to 18 AWG depending on the distance and current requirements of your application. It's best to consult the NEC or other relevant standards to ensure proper wire sizing for safety and efficiency.

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Q: What is the lowest wire gauge to use with 24 volt dc?
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Can you use 600 volt wire for 240 volt appliance?

Yes, you can use 600 volt wire for a 240 volt appliance. Just make sure that the wire meets the appropriate gauge size for the current draw of the appliance to avoid overheating and ensure safety.


What is the largest wire that will fit in a 40 amp breaker?

You should not use any wire smaller than 8 AWG COPPER in a 40 amp breaker. If you have any questions about your application, you should contact a local electrical contractor for your own safety.


Can a 120 volt water heater work over a 14 gauge wire at 300 feet?

A 120-volt water heater should not be run over a 14-gauge wire at 300 feet. The voltage drop over such a long distance would be significant, potentially causing the water heater to not function properly or even become a safety hazard. It is recommended to use a larger gauge wire or locate the heater closer to the power source.


What gauge wire do have to have for 110 volt 30 amp service 200 ft away?

For a 200 ft distance, you should use at least a 8 gauge wire to minimize voltage drop and ensure safe operation for a 30 amp, 110 volt circuit. It is important to consult a licensed electrician to determine the specific wire size needed based on the load and local electrical code requirements.


Can you use 12 gauge wire with 600 volt capacity to hook up an 300 amp 220 volt dryer?

No, a 12 gauge wire is not sufficient to handle a 300 amp load for a dryer. You would need a wire with a much higher ampacity rating, likely in the range of 2/0 or 3/0 gauge wire to safely handle that current. It is important to always match the wire size to the amperage of the appliance to ensure safety.