Motors & EquipmentQuestion 95 of 120
Where must a motor disconnecting means be located relative to the motor?
a.Within 25 feet of the motor in all cases
b.In sight from the motor location and the driven machinery, unless it is capable of being locked in the open position
c.Anywhere on the same floor level as the motor
d.In sight from the controller only, with no rule about the motor
Explanation
A disconnect must be in sight from the motor and driven machinery so a technician working on the equipment can see that it is open; the alternative is a disconnect elsewhere that is capable of being individually locked in the open position with the locking means remaining in place. In sight means visible and not more than 50 feet away, and a separate rule requires a disconnect in sight from the controller.
Law Reference: 2023 NEC §430.102(B)Practice all 120 questions free — no signup required.
Related questions on this topic
- When sizing motor branch-circuit conductors and short-circuit protection, which current value must be used?
- A continuous-duty motor over 1 horsepower is marked with a temperature rise of 40 degrees C but no service factor. What percentage of nameplate full-load current sets the maximum overload device?
- A continuous-duty motor over 1 horsepower has no marked service factor and no marked temperature rise. What is the maximum overload device rating as a percentage of nameplate full-load current?
- An air conditioning condensing unit nameplate reads minimum circuit ampacity 24.6 and maximum overcurrent protective device 40. What overcurrent device must be installed?
- A hermetic refrigerant motor-compressor has a rated-load current of 20 amperes. What is the maximum branch-circuit short-circuit and ground-fault protective device at the standard 175 percent figure?
- For that same 20-ampere rated-load compressor supplied alone, what minimum conductor ampacity is required?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against Journeyman Electrician Licensing Exam (NEC-based) · How we review