Bonding at hyrdomassage tub motor question

[Joe Funderburk, CMI]

Are we missing a bond here? Is that a bond screw on the top of the motor (it wasn't green)? If it is required to be bonded, what do you bond it to? The supply cord that you see in the photo runs to a standard 20 amp outlet.

[Robert Meier]

You will get varying opinions on this since the wording of 680.74 is rather murky. IMO you need to connect that to nothing unless the tub has a metal piping system in contact with the circulating water. This could be an external heating unit but in most case all of the piping in contact with the circulating water is plastic. I do see some guys putting a jumper to the hot and cold water pipes feeding the faucet but IMO it's not required. The instructions provided by the tub manufacturer may have requirements that exceed those required by the NEC.

680.74 Bonding.
All metal piping systems and all grounded metal parts in contact with the circulating water shall be bonded together using a solid copper bonding jumper, insulated, covered, or bare, not smaller than 8 AWG. The bonding jumper shall be connected to the terminal on the circulating pump motor that is intended for this purpose. The bonding jumper shall not be required to be connected to a double insulated circulating pump motor. The 8 AWG or larger solid copper bonding jumper shall be required for equipotential bonding in the area of the hydromassage bathtub and shall not be required to be extended or attached to any remote panelboard, service equipment, or any electrode.

[Joe Funderburk, CMI]

Thanks Robert.

[Mark Thorman]

Is it required on page 12 and 13 of installation guide?

http://www.jacuzzi.com/admin/files/f...1f7-08a843.pdf

[Brian E. Kelly]

Originally Posted by jfunderburk

Are we missing a bond here? Is that a bond screw on the top of the motor (it wasn't green)? If it is required to be bonded, what do you bond it to? The supply cord that you see in the photo runs to a standard 20 amp outlet.

Attachment 40986 Attachment 40987

The Icon/legend on the motor is for a Ground.