Handrail bonding

[SOCOSparky]

Good afternoon all, I am wiring for a hot tub which has horizontal cable railing between two wooden posts, (10 cables to be exact). These cables are within 5’ of tub so I need to bond them. I haven’t ran into this before(the ones that I have encountered had metal posts so I just had to bond post and that also bonded cables) just looking for any clean suggestions on how to do this, my thought is cutting a piece of galvanized strut and fastening it to post next to cables then adding a lay-in lug for each cable and then running copper bond to strut?? Any other ideas would be great thanks

 

[Elect117]

I don't know if strut is a approved or listed grounding and bonding method. Strut typically needs to be bonded as exposed metal that is likely to become energized but I don't think it qualifies as a method of bonding different metal systems electrically.

Maybe RMC like 680.26 says?

Some portions of NEC Art. 680 require it to be copper wire. Like hyrdomassage bathtubs. I would take a look at Art. 680 and see which one fits for your install.

I think you are 680.42 / 680.26.

 

[infinity]

How are the cables attached to the posts? Typically a threaded fitting of some sort. I would look to make the connection there.

 

[suemarkp]

Split bolts on each cable with a copper tail to the equipotential grid? Maybe done right that the vertical post to try and hide the mess?

Also not sure that the strut not being listed matters. If you were going to bond something made of metal screwed together and you attach a wire to it somewhere, there is no guarantee that the metal object makes good electrical connectivity throughout. A single solid piece of metal should be fine for bonding. Would a crazy inspector make you separately bond each piece of a strut rack because the strut bolts aren't listed for bonding?