What type of bonding jumper must be installed in the raceway when using PVC from a pool light forming shell to a junction box?

The requirement for a bonding jumper in the context of pool lighting and PVC raceway is crucial for ensuring safety and proper electrical grounding. When using PVC raceways for pool lighting applications, the bonding jumper must be made from solid or stranded insulated copper. This is because copper offers excellent conductivity and corrosion resistance, making it ideal for grounding and bonding applications, especially in environments where moisture and chemical exposure can occur, such as around a pool.

The insulation on the copper bonding jumper also helps prevent accidental contact with live electrical parts, enhancing safety. With PVC raceway being non-metallic, it does not provide any inherent grounding or bonding capabilities - this is where the solid or stranded insulated copper bonding jumper becomes necessary to connect the metal forming shell of the pool light to the grounding system, thereby helping to mitigate shock hazards.

Other materials, such as aluminum or steel, may not provide the same level of corrosion resistance or conductivity as copper, especially in wet environments. Gold, while an excellent conductor, is not typical or practical for bonding applications due to its cost and the fact that it is not commonly used in electrical installations per NEC guidelines. Thus, using solid or stranded insulated copper ensures compliance with safety regulations while providing effective electrical connectivity and grounding.