Can a conduit be bonded without using Grounding Bushings?

[Installer]

We installed this Polyphaser Box along with an aluminum conduit running to a metal raceway on the Roof.
The conduit will contain RF cable for antennas.
We learned after the fact that the Conduit must be bonded at either side.
(this is for lightning protection reasons and not electrical reasons)
Its a bit too late to put in Grounding Bushings on either side of the Conduit,
Is there anyway we can bond the conduit on each end without using Grounding Bushings?
Even though this is Lightning protection, does the NEC Code ststill apply?
Thank you in Advance

 

[SceneryDriver]

Use split bonding bushings. They're designed for applications like you have, where you need to install a bonding bushing around preexisting conductors:

https://www.gordonelectricsupply.com/p/Bridgeport-Sgb-385Cl-1-1-2-Splt-Ground-Bushing-14-1-0-Awg/5795431

SceneryDriver

 

[Buck Parrish]

That split bushing is a life saver. But also some connectors and locknuts are already rated to be used to create an effective bond.

 

[Installer]

Thank you very much. I was dreading have to take that all down and redo it. Its heavy and its pretty high off the ground.

 

[BarryO]

Use split bonding bushings. They're designed for applications like you have, where you need to install a bonding bushing around preexisting conductors:

https://www.gordonelectricsupply.com/p/Bridgeport-Sgb-385Cl-1-1-2-Splt-Ground-Bushing-14-1-0-Awg/5795431

SceneryDriver

Interesting. In the past I've used the 2-piece bronze bonding/grounding clamp.

 

[suemarkp]

You have locknuts on the conduit don't you? Isnt that sufficient? It usually unless it's a service. Would think that is adequate for coax cables, even if a concentric knockout.

 

[ggunn]

Simple. Just drive a self tapping screw into the conduit and wrap a piece of wire around it while you get a buddy to hold your beer.

 

[SceneryDriver]

You have locknuts on the conduit don't you? Isnt that sufficient? It usually unless it's a service. Would think that is adequate for coax cables, even if a concentric knockout.

OP stated that it's a lightning protection requirement, and not NEC related.


SceneryDriver

 

[LarryFine]

Interesting. In the past I've used the 2-piece bronze bonding/grounding clamp.

 

[jaggedben]

Grounding wedges can also be used for this.

 

[jaggedben]

...
Even though this is Lightning protection, does the NEC Code ststill apply?
...

The NEC would apply but would not require bonding both ends. Who told you it was required for lightning protection and does that come from a job spec or from a lightning protection professional involved in the project? You may be required to do it but not by the NEC afaik.

 

[suemarkp]

The grounding of the polyphasers seems much more important than the grounding of the conduit around the cables, since the cable shield and/or center conductor is most likely what is carrying all the lightning current. I've never had to work with any specific lightning protection codes, but had many rooftop boxes with polyphaser type devices in them. But here in the Seattle area, lightning is a rare occurrence, but we did lose a few GPS antennas due to lightning hits. For most of mine, the cables were in open trays on the roof and not in a raceway. Only the plate the polyphasers were mounted to had a GEC to building steel. That plate was bolted to the box and the conduit to the building interior was just locknutted to the box.