Bond bushings in open bottom switchgear

[pollobot]

I have a 1600A feeder (6 x 3-1/2") run in EMT from first to third floor, stubbed into the bottom of open bottom switchgear. Are bond bushings required to bond the raceways to the switchgear ground bus, or is a plastic bushing sufficient?

 

[raider1]

I have a 1600A feeder (6 x 3-1/2") run in EMT from first to third floor, stubbed into the bottom of open bottom switchgear. Are bond bushings required to bond the raceways to the switchgear ground bus, or is a plastic bushing sufficient?

If the raceways are metal raceways they would need to be bonded.

Chris

 

[Carultch]

If the raceways are metal raceways they would need to be bonded.

Chris

If it is properly bonded on the other end, uses a wire EGC, and it neither contains service conductors nor a GEC, does it still need a bonding bushing? Bottomless equipment, plastic enclosures, metal enclosures with ring KOs, or others.

I put together this flowchart for bonding bushings. Please let me know if you agree.

 

[raider1]

If it is properly bonded on the other end, uses a wire EGC, and it neither contains service conductors nor a GEC, does it still need a bonding bushing? Bottomless equipment, plastic enclosures, metal enclosures with ring KOs, or others.

I put together this flowchart for bonding bushings. Please let me know if you agree.

Correct,

If the EMT is properly bonded on the other end and there is a wire type equipment grounding conductor then a bonding bushing would not be necessary.

Chris

 

[infinity]

Correct,

If the EMT is properly bonded on the other end and there is a wire type equipment grounding conductor then a bonding bushing would not be necessary.

Chris

I agree, but this has been argued here Ad nauseam with a small minority opinion that this is not code complaint.

 

[raider1]

I agree, but this has been argued here Ad nauseam with a small minority opinion that this is not code complaint.

Thanks for the info, I will have to look up the old threads and read them.

Chris

 

[iwire]

I put together this flowchart for bonding bushings. Please let me know if you agree.

To me that just complicates the heck out of it.

 

[kwired]

If a bond connection is necessary it doesn't have to be via a bonding bushing - that is one option of how it can be done. Clamps like used to bond piping systems may work well.