What is the maximum overcurrent protection of resistance-type electric space heating equipment?

• A. 60 amps
• B. 40 amps
• C. 50 amps
• D. 70 amps plus an additional 150% if motor driven

Answer: (A)

The key idea is that resistance-type space heating equipment is treated as a high-wower, non-motor load, and the code sets a clear ceiling on the overcurrent protection that can be used for such devices. For these heaters, the maximum overcurrent protection is 60 amps. This limit aligns with typical wiring practices and conductor ampacities used for these circuits, while still providing protection against faults that could cause overheating. The other options don’t fit this category: some are larger than what the code allows for resistance-type space heating, and the rule about motor-driven equipment doesn’t apply here because those rules come from motor-specific sections of the code, not from the protections for pure resistance heating.