What is the minimum size of a bonding jumper for bonding steel in a pool wall to a diving board?

The minimum size of a bonding jumper for bonding steel in a pool wall to a diving board is 8 AWG. This requirement ensures that there is a sufficient conductor cross-sectional area to handle potential fault currents and provide effective grounding, which is crucial for safety in electrical installations, particularly in wet environments such as pools.

The National Electrical Code (NEC) outlines specific requirements for bonding in swimming pool areas to mitigate electric shock hazards. In this context, the bonding jumper acts as a conductor that connects various metal components, ensuring they are at the same electrical potential. Using an 8 AWG conductor meets the NEC standards for maintaining safety and integrity in electrical systems associated with pools, protecting against electric shock and other hazards that can arise in such settings.

A larger conductor size (such as 6 AWG or 4 AWG) would exceed the minimum requirements but is not necessary under typical conditions, while smaller sizes (such as 10 AWG) would not provide the needed safety and effectiveness as mandated by the code. Thus, 8 AWG is selected as the appropriate minimum size for this application.