What is the maximum rating for a portable generator's receptacles that require GFCI protection?

The correct answer indicates that the maximum rating for a portable generator's receptacles requiring GFCI protection is 15 kilowatts (kW). This limitation is rooted in electrical safety standards aimed at minimizing the risk of electrical shock. Generators are often used in various environments, including outdoor and construction settings, where the risk of users coming into contact with water is heightened.

GFCI (Ground Fault Circuit Interrupter) devices are designed to quickly cut off the power supply when a ground fault is detected, significantly reducing the risk of electrocution. The 15 kW rating reflects a balance between ensuring sufficient power capability for portable applications while maintaining a focus on safety.

Regulations specify that receptacles used for temporary power, especially those that might be accessed by untrained individuals or used in wet conditions, must have GFCI protection if they exceed this rating. This is crucial to comply with national electrical codes and promote safe usage practices. Generators rated above 15 kW may not have the same stringent requirements for GFCI protection because their applications often involve trained personnel and more controlled environments, reducing the risk of electrical hazards.