I am seeing many intermittent motors of various size over 1 hp without overload protection. I also see many 220V 1ph intermittent that disconnect only one hot leg. Many of these have the maker's instructions pointing out 430-33. My gut says something is fishy.
Sparky what application do you see motors controlled by only opening one grounded conductor? That sounds a little frightening . Who services these motors?art 430-103 says open all ungrounded supply conductors.
The motor controller is only required to open enough conducotrs to stop the current flow. On a single phase motor this would be 1 conductor, and on a 3 phase it would be 2 conductors. See 430-84. 430-103 applies to the motor disconnect, NOT the condroller, and is required to open all of the ungrounded supply conductors.
Sparky, Your car lift installation requires a disconenct loacted in sight from the controller (430-102). If the momentary switch directly operates the motor, it is the controller. If the momentary switch operates a contactor, the contactor is the controller.
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