What is the minimum bonding conductor size for a hydromassage bathtub?

For a hydromassage bathtub, the minimum bonding conductor size is determined based on the requirements outlined in the National Electrical Code (NEC). Specifically, NEC Article 680 addresses the installation of pools, spas, and similar installations, which includes hydromassage bathtubs.

According to NEC standards, the minimum size for a bonding conductor in these applications is typically specified to ensure adequate electrical safety and to prevent shock hazards. The correct answer indicates that 8 AWG solid copper is the minimum size required. This size provides sufficient conductivity and mechanical strength to safely bond the equipment and components of the hydromassage bathtub to reduce the risk of electrical shock and ensure proper grounding.

Other sizes, such as 4 AWG, 6 AWG, and 10 AWG, may not meet these specific requirements for this type of installation as outlined by the NEC. Using a conductor that is too small may not provide the necessary protection, while a size that is overly large is unnecessary and may add to the installation costs and complexity without adding any practical benefit.