Western Electrical Contractors Association (WECA) 103 Practice Test

Bonding metal components is about keeping all the conductive parts at the same electrical potential so a user doesn’t encounter a dangerous voltage difference between them. In a hydromassage tub, tying the metal shell, fittings, and nearby metalwork to the equipment grounding system creates an equipotential environment. If a fault energizes any part, the bonding path provides a low-impedance route for the fault current, allowing the protection device to trip quickly and reduce the chance a person will receive an electric shock. This safety function is not about increasing current flow, shortening equipment life, or reducing noise—it's specifically about lowering shock risk by preventing potential differences.