I'm wiring a 240volt 40amp hot tub running 3#8's with a #10 ground. the tub is being located in a metal screen house thats connected to the main house its going to be set 12inches from the outer walls. My question is about bonding the metal screen house. 1st does it have to be bonded. And if so can I use a ground rod and bond it to the screen house with #8 solid. Iv'e asked a few people and nobody can give me a definite anwser.
Ground rods are for grounding not bonding.
680.43(D) Bonding. The following parts shall be bonded together:
(1) All metal fittings within or attached to the spa or hot
tub structure
(2) Metal parts of electrical equipment associated with the
spa or hot tub water circulating system, including pump
motors, unless part of a listed self-contained spa or hot tub
(3) Metal raceway and metal piping that are within 1.5 m
(5 ft) of the inside walls of the spa or hot tub and that
are not separated from the spa or hot tub by a permanent
barrier
(
4) All metal surfaces that are within 1.5 m (5 ft) of the
inside walls of the spa or hot tub and that are not
separated from the spa or hot tub area by a permanent
barrier