Which of the following parts must also be bonded if located within 5 feet horizontally of the inside walls of a pool?

The requirement under the National Electrical Code (NEC) related to bonding near pool areas emphasizes safety by ensuring that all fixed metal parts within a certain proximity to the pool are effectively bonded. This is crucial because if a fault occurs in the electrical system, any stray voltage traveling through conductive materials can create a shock hazard for individuals near the water.

Bonding helps to equalize the electrical potential between metal parts, reducing the risk of electrical shock. Specifically, all fixed metal parts, such as railings, ladders, and structural elements, must be bonded if they are within 5 feet horizontally from the inside walls of a pool. This ensures that any metal components cannot become energized and poses a danger to swimmers.

While other components like lighting fixtures, pool heating systems, and electrical outlets hold their own importance regarding safety and grounding, the bonding requirement explicitly covers fixed metal parts to mitigate shock hazards effectively. Thus, recognizing that all fixed metal parts must be bonded is aligned with the NEC's focus on enhancing safety around pool areas.