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How many current sensing devices are required by the National Electrical Code to protect a single-phase motor operated on 240 volts?
Wiki User
∙ 7y ago
For a single phase fractional horsepower motor, only one over current device is needed in the motor feeder. This protection can come in the form of a switch which has the overload heater incorporated into it. These switches come in single and double pole configurations. Select the heater for the motors full load current that is taken from the motors nameplate. Search the web for "fractional motor starter switch".
Wiki User
∙ 7y ago
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