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500 MCM can carry 380 Amps at 75 degrees C.
Wiki User
∙ 13y ago
The amp rating of a 500 MCM (thousand circular mil) cable can vary depending on the insulation type and installation conditions. Generally, a rough estimate for a 500 MCM cable with THHN insulation in a typical installation would be around 380-400 amps. However, it is recommended to consult the manufacturer's specifications or a qualified electrician to determine the exact ampacity for a specific application.
Wiki User
∙ 10y agoWire sizes from 250 to 500 MCM conductors all have 37 strands within the cable.
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To calculate the amp rating for a 2kW fan heater, divide the power rating (2000 watts) by the voltage of your electrical system. For example, in a 120V system, the amp rating would be around 16.67 amps (2000 watts / 120 volts).
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The amp rating of NM (Non-Metallic) wire varies depending on the gauge of the wire. For example, a 14-gauge NM wire typically has an amp rating of 15 amps, while a 12-gauge NM wire has an amp rating of 20 amps. It is important to consult local building codes and regulations to determine the appropriate wire gauge and amp rating for specific applications.
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No, it is not safe to use a 20 amp breaker for a heater with a 21 amp rating. The breaker should be rated at least equal to or higher than the amp rating of the appliance to prevent overheating and potential fire hazards. It is recommended to use a 25 amp breaker for a 21 amp heater.
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Can you use a 20 amp breaker if the amp rating on a heater is 21 amp?
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