Equipment & SystemsQuestion 255 of 521
A motor control circuit tapped from the load side of the motor branch-circuit protection is generally protected against overcurrent according to which NEC provision?
a.Article 240 only
b.Table 430.52
c.NEC 430.72 (motor control circuits)
d.Article 450
Explanation
NEC 430.72 and Table 430.72(B) govern overcurrent protection of motor control circuit conductors, including tapped control conductors. Table 430.52 covers motor branch-circuit (power) protection, Article 240 covers general circuits, and Article 450 covers transformers.
Law Reference: 2023 NEC §430.72Practice all 521 questions free — no signup required.
Related questions on this topic
- A feeder supplies two three-phase, 460 V motors: 20 HP (FLC 27 A) and 10 HP (FLC 14 A). Per NEC 430.24, what minimum feeder conductor ampacity is required?
- A motor disconnecting means must have an ampere rating at least 115% of the motor FLC. For a 15 HP, 460 V, three-phase motor (FLC 21 A), what is the minimum disconnect ampere rating?
- In a motor installation, what is the primary function of the motor controller?
- A single hermetic refrigerant motor-compressor has a rated-load current of 24 A. Per NEC 440.32, what minimum branch-circuit conductor ampacity is required?
- On an air-conditioning unit nameplate, what does the 'Minimum Circuit Ampacity (MCA)' value tell the installer?
- The 'Maximum Overcurrent Protective Device' (MOCP or 'Max Fuse/HACR Breaker') rating on an HVAC nameplate specifies what?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB C-10 Electrical Trade Examination · How we review