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Cable Tray to EMT Bonding - Separate EGC

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Tiki1469

Member
Location
USA
Occupation
Contractor
Job calls for separate bonding conductor because the customer does not want to use the tray as an EGC (24in tray w/ 2 sq.in. cross-section (2000amp). Running separate 3/0 copper or better to bond (3) 1200amp mains to a transformer. They exit the transformer through EMT chase nipples, enter the tray, then enter the 1200amp main enclosures with roughly 2ft EMT nipples. If I understand correctly, I need to bond this cable tray to the EMT on both ends with 3/0 copper or better.

My question is: What is the proper way to bond the tray to EMT? Bonding bushing like rigid?
 
Dsg319

Dsg319

Senior Member
Location
West Virginia
Occupation
Wv Master “lectrician”
Tiki1469 said:
Job calls for separate bonding conductor because the customer does not want to use the tray as an EGC (24in tray w/ 2 sq.in. cross-section (2000amp). Running separate 3/0 copper or better to bond (3) 1200amp mains to a transformer. They exit the transformer through EMT chase nipples, enter the tray, then enter the 1200amp main enclosures with roughly 2ft EMT nipples. If I understand correctly, I need to bond this cable tray to the EMT on both ends with 3/0 copper or better.

My question is: What is the proper way to bond the tray to EMT? Bonding bushing like rigid?
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That’s what I would do.
 
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