Grounding Bushing Alternatives

[APavlatos]

I have a 1600 amp xfer switch with 21- 4" GRC conduits entering it. Due to clearences between conduits, I do not have room for grounding bushings. Is there and "end of conduit" alternative?

I was thinking something like this on the end of the pipes http://www.erico.com/products/ERITECH_RC70_RC100.asp

TIA

 

[Dennis Alwon]

Will a grounding locknut work.

 

[APavlatos]

No sir, it is an open bottom gear.

 

[APavlatos]

And the wire is in and terminated!

 

[iwire]

Pretty sure OZ-Gedney makes 'split, bolt on' bonding bushings. they still need some space but will not have to be spun on.

And speak to the guy that roughed it.

 

[APavlatos]

He was directed by the Engineer to do it. Now we need a fix.

 

[Dennis Alwon]

Can you chip out the concrete and move them a tad? Are they that close that you can't get the bushing on with the bonding bracket removed?

 

[APavlatos]

Can you chip out the concrete and move them a tad? Are they that close that you can't get the bushing on with the bonding bracket removed?

They have plastic bushings on them already and the gear is energized, some of the plastic bushings had to be beaten on. And no, they barely fit in the gear, spreading them would overwhelm the space.

 

[infinity]

You could spin on a plastic bushing but not a grounding bushing with the lug removed?

 

[Dennis Alwon]

I would not want to do this live but if the gear can be cut off could you drill and tap the conduit and then use a short screw, that is flush on the inside, to hold a lug on the pipe.

 

[APavlatos]

You could spin on a plastic bushing but not a grounding bushing with the lug removed?

Most of the PB's we tapped on.

 

[APavlatos]

I would not want to do this live but if the gear can be cut off could you drill and tap the conduit and then use a short screw, that is flush on the inside, to hold a lug on the pipe.

No room to drill on the inside conduits

 

[Dennis Alwon]

So the job seems impossible to fix. What can you do? Even the erico clamps you show can't work if there is no room between the conduits. Sounds like a puzzle with no solution.

 

[APavlatos]

imagine something like this

 

[APavlatos]

So the job seems impossible to fix. What can you do? Even the erico clamps you show can't work if there is no room between the conduits. Sounds like a puzzle with no solution.

I just need a product (if it exists) that allows top of pipe bonding/grounding

 

[Dennis Alwon]

imagine something like this

I can't. :grin: Looks like you are in deep doo-doo. I missed the fact there were 21 pipes.
Other than a grounding bushing I don't know what else is available for that situation.

 

[APavlatos]

I can't. :grin: Looks like you are in deep doo-doo. I missed the fact there were 21 pipes.
Other than a grounding bushing I don't know what else is available for that situation.

hahaha!

Yes I realise I am in deep doodee!

 

[infinity]

Is the conduit required to be bonded at both ends? If there's an EGC in each conduit would a bonding bushings on the other end satisfy the grounding requirements for the RMC?

 

[APavlatos]

Is the conduit required to be bonded at both ends? If there's an EGC in each conduit would a bonding bushings on the other end satisfy the grounding requirements for the RMC?

PVC between the 2

 

[Dennis Alwon]

PVC between the 2

If the conduit is pvc why would you bond it?