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You can use a switch or circuit breaker as both a controller and a disconnecting means for motor applications [430.111]. But only if it meets certain requirements or is one of the following:
If it’s not one of these, it must:
Generally, every motor must have its own disconnect [430.112] but there are three exceptions:
If there’s more than one power source to a motor (or motor-operated equipment), each source must have its own disconnect immediately adjacent to the equipment served [430.113]. This rule has two exceptions:
In this six-part series, we’ve covered the motor disconnecting means requirements of Article 430, Part IX. Examination of Part IX reveals some basic principles. For example, the disconnect must be of the correct type and rating for the application.