The bonding conductor for a hydromassage bathtub shall not be smaller than how many AWG of solid copper?

• A. Six AWG
• B. Seven AWG
• C. Eight AWG
• D. Ten AWG

Answer: (C)

Bonding is about creating an equipotential path to keep all metal parts at the same electrical potential, reducing shock risk in a wet environment. For a hydromassage bathtub, the code specifies a minimum size for that bonding conductor so it can carry fault current reliably and keep impedance low enough to trip the protective device quickly. The required minimum is eight AWG copper, solid, to ensure a sturdy, low-impedance bond between all exposed metal parts and the bonding grid. Larger conductors (like six or seven AWG) would also meet the rule, but eight AWG is the stated minimum. Ten AWG is too small for this bonding purpose.