What is the required outlet feature that firefighters should use when plugging in equipment?

Firefighters are required to use a Ground Fault Circuit Interrupter (GFCI) outlet when plugging in equipment because it is designed to protect individuals from electrical shock hazards. GFCIs rapidly cut off the electricity supply if they detect an imbalance in the current, which can occur if the electrical current is flowing through an unintended path, such as through water or a person's body. This is particularly important in firefighting, as firefighters often work in hazardous environments where there may be water, moisture, or debris present which increases the risk of electrical shock.

Using a GFCI enhances safety in situations where electrical equipment is used under wet conditions or where the potential for exposure to conductive materials is high. This type of outlet is crucial for maintaining electrical safety standards and preventing electrical accidents during emergency operations.

The other options do not provide the same level of protection. A standard electrical outlet does not have the protective features of a GFCI, while a heavy-duty outlet generally refers to the capacity to handle larger wattages but lacks the safety features necessary for shock protection. Similarly, a surge protector outlet is designed to protect against voltage spikes rather than provide protection from ground faults, which makes it unsuitable for the specific needs of firefighters.