equipotential bonding for hot tub

[Stevenfyeager]

I wish all states adopted the same codes. In IN, we don't have to bury equipotential system underground around the perimeter under a hot tub concrete slab, but years ago, Louisville required it. Are many of you required to do this? Thank you

 

[Dennis Alwon]

It dependson what code you are under. The 2014 has changed a bit and now does not require the perimeter bond in most cases

Equipotential bonding of perimeter surfaces in accordance
with 680.26(B)(2) shall not be required to be provided
for spas and hot tubs where all of the following
conditions apply:
(1) The spa or hot tub shall be listed as a self-contained spa
for aboveground use.
(2) The spa or hot tub shall not be identified as suitable
only for indoor use.
(3) The installation shall be in accordance with the manufacturer’s
instructions and shall be located on or above
grade.
(4) The top rim of the spa or hot tub shall be at least
710 mm (28 in.) above all perimeter surfaces that are
within 760 mm (30 in.), measured horizontally from
the spa or hot tub. The height of nonconductive external
steps for entry to or exit from the self-contained spa
shall not be used to reduce or increase this rim height
measurement.

 

[bphgravity]

This is a complicated issue depending on what code edition you are on and whether or not the spa is located indoors or outdoors.

Under the 2008 NEC (which I believe Indiana is currently enforcing), both indoor and outdoor spas are required to comply with 680.26. See 680.42 & 680.43.

Under the 2011 NEC, indoor spas have an exemption to 680.26(B)(2). Outdoor spas do not. However, TIA 11-1 provides that exception for outdoor spas.

And as indicated by Dennis, the 2014 NEC provides the exception for both indoor and outdoor spas.


The best thing to do is consult your AHJ and find out what policies and rules are in effect for this particular issue.