What type of protection is required for rooftop receptacle outlets servicing HACR equipment?

The correct choice is GFCI protection for rooftop receptacle outlets servicing HACR (Heating, Air Conditioning, and Refrigeration) equipment. Ground Fault Circuit Interrupter (GFCI) devices are essential in locations where electrical equipment is used in wet or damp environments, such as rooftops, to enhance safety by preventing electrical shock.

GFCI outlets monitor the current flowing through the circuit and can detect imbalances caused by current leakage to the ground. If a ground fault is detected, the GFCI quickly disconnects the power supply, reducing the risk of electrocution. This is particularly important for rooftop applications where moisture, condensation, or water exposure can lead to hazardous conditions.

In contrast, while surge protection devices are essential for safeguarding equipment from voltage spikes, they do not specifically address the risks of electrical shock associated with ground faults. Fused protection and standard breakers can help prevent overcurrent situations but do not provide the same level of safety as GFCI protection in damp environments. Thus, GFCI is the most suitable protection type for these particular receptacle outlets.