The NEC® does the branch-circuit conductors for a range to be sized at less than the nameplate rating of the range.

The NEC® does the branch-circuit conductors for a range to be sized at less than the nameplate rating of the range.

• A. Does Not Permit
• B. Requires Equal Rating
• C. Does Permit
• D. Is Not Specified

Answer: (C)

The main idea is that the NEC allows sizing the branch-circuit conductors for a range based on the actual or calculated load, not strictly the full nameplate rating. The nameplate shows the maximum current the range could draw, but it doesn’t mean the circuit must always be sized for that full amount. The code uses demand factors and load-calculation methods to reflect how ranges operate in real life—heating elements cycle, only part of the elements may be on at once, and there may be other loads that don’t run simultaneously. When these calculations show a smaller required ampacity, the branch-circuit conductors can be sized accordingly, with the overcurrent protection and conductor insulation still meeting the relevant code requirements. So the NEC does permit sizing conductors at less than the nameplate rating, provided the proper calculations and protections are followed.

The main idea is that the NEC allows sizing the branch-circuit conductors for a range based on the actual or calculated load, not strictly the full nameplate rating. The nameplate shows the maximum current the range could draw, but it doesn’t mean the circuit must always be sized for that full amount. The code uses demand factors and load-calculation methods to reflect how ranges operate in real life—heating elements cycle, only part of the elements may be on at once, and there may be other loads that don’t run simultaneously. When these calculations show a smaller required ampacity, the branch-circuit conductors can be sized accordingly, with the overcurrent protection and conductor insulation still meeting the relevant code requirements. So the NEC does permit sizing conductors at less than the nameplate rating, provided the proper calculations and protections are followed.