NEC Commercial Electrical Practice Test

What type of protection should be in place for portable signs placed in wet locations?

1. Insulated wires

2. Ground fault circuit interrupter

3. Metal enclosures

4. Non-conductive frames

The correct answer is: Ground fault circuit interrupter

The requirement for ground fault circuit interrupters (GFCIs) in wet locations is critical for ensuring safety. GFCIs are designed to detect ground faults, which occur when electrical current strays from its intended circuit. In the case of portable signs placed in wet locations, such as outdoors in environments where they may be exposed to rain or puddles, the risk of water creating unintended paths for the electrical current increases significantly. If a ground fault occurs, it can lead to electric shock or electrocution, making the GFCI a vital component in protecting individuals from these hazards. GFCIs work by monitoring the flow of electrical current and tripping the circuit when an imbalance is detected, typically within milliseconds. This rapid response can prevent serious injury or death in dangerous situations. Alternative options may offer some benefits in terms of reducing risks associated with electrical installations; however, they do not specifically address the unique hazards presented by wet locations. Insulated wires and metal enclosures serve different protective purposes—insulation is crucial for preventing accidental contact with live components, and metal enclosures provide physical protection for electrical equipment but do not address ground faults. Non-conductive frames might reduce risks from direct contact, but they don't provide the active protection against ground