Listed Motor Circuit Switch

Motor branch circuit conductors are protected against overcurrent by overloads sized at 115 to 125 of motor nameplate current rating 430 32.

Listed motor circuit switch.

Listed electromechanical motor controller ul 508 or ul 60947 4 1 nldx or listed solid state motor controller ul 508 or ul 60947 4 2 nmft without motor overload protection fast mc slow mc same as mc above except designates two individual contactors fast speed and slow speed for two speed motor controller. Multipole switches are permitted for use only on. You must protect each motor branch circuit against short circuits and ground faults by a protection device sized no greater than the percentages listed in table 430 52. This marking should read listed pullout switch.

Molded case switches as listed to ul 489. The substantiation for this new exception demonstrated that it is common for non fused switches with. Manual no operation nop auto have fun. Selector switch has been added to a simple circuit on off motor for mode selection.

Circuits unless listed and marked for other than single circuit use. A general use snap switch used to supply a 1 hp motor shall be permitted to control a load of not greater than. You must protect each motor branch circuit against short circuit and ground fault by a protection device sized no greater than the percentages listed in table 430 52. Motor branch circuit conductors are protected against overcurrent by overloads sized at 115 to 125 percent of motor nameplate current rating 430 32.

Requirements for motors motor components and controllers can be found in a number of articles in the national electrical code nec but article 430 specifically covers motors motor branch circuit and feeder conductors and their protection motor overload protection motor control circuits motor controllers and motor control centers mccs 430 1. Used for motor motor circuit and group motor protection. There is a new exception permitting a listed non fused motor circuit switch having a horsepower rating equal to or greater than the motor horsepower to have an ampere rating less than 115 percent of the full load current rating of the motor.