What does NEC Article 680 require for power supplies to pool lighting systems?

NEC Article 680 mandates that power supplies for pool lighting systems must be connected through a Ground Fault Circuit Interrupter (GFCI)-protected circuit. This requirement is crucial for safety, as it helps protect individuals from electric shock hazards. The GFCI continuously monitors the current flowing through the circuit and can detect any ground faults, which can occur if there is water exposure or if a person comes into contact with a live conductor.

By requiring GFCI protection, the code ensures an added layer of safety for users who are near or in the water, significantly reducing the risk of electrical shock, which could potentially be life-threatening in a pool environment. This protective measure is especially important considering the conductive nature of water, which can easily transmit electricity and increase the risk of dangerous situations.

The other choices reflect incorrect practices. For example, installing lighting above the water surface, while possibly relevant for certain fixtures, does not address the crucial safety aspect of electrical shock protection. Similarly, connecting directly to any circuit ignores the necessary safety protocols established by the NEC. Moreover, using high-voltage supply lines does not align with the code, as it could pose significant risks without proper protections in place.