Understanding electrical switch ratings


Old 01-27-16, 01:33 AM
CircuitBreaker's Avatar
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Understanding electrical switch ratings

The fan I found also needs a new speed control switch (The plastic shaft broke)
The motor draws 4.1 Amps on high
the switch I found is rated 13 Amps at 120Volts or 10 (3) AMPS at 250Volts. I get the 120 Volts portion (Which is the voltage I would be using the switch at anyway but I am curious as this is not the first time I have seen this used in switch ratings) but what is the 3 in parenthesis for?

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Old 01-27-16, 05:57 AM
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The number in parenthesis is the maximum electric motor horsepower the switch can interrupt at the stated voltage, 240 VAC in your example.
Old 01-27-16, 05:59 AM
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What is the model# of the switch?
Old 01-27-16, 06:35 AM
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One horsepower in electrical terms is approximately 750 watts, or slightly over 3 amps at 240 volts.

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