Help settle argument

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jfeagin

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A feeder for a panel is being run for a critical care area in a hospital. EMT is being used with plastic bushings at each termination and junction point.

Article 517.19(D) requires that grounding be ensured on a metal raceway by: (1) A grounding bushing and a copper jumper or (2) connection to threaded hubs or bosses or (3) bonding type locknuts or bushings.


One argument is that a standard EMT set screw connector is in fact a threaded boss(the collar on the fitting being the boss). Therefore the connector is sufficient and no other additional bonding is necessary.

The other interpretation is that the code is asking for something in addition to ENSURE that the raceway is bonded to the enclosure, and that a boss is a conduit body. Therefore a bonding bushing with a copper bonding jumper would be required for the EMT connector.
 
Seems to me that it's saying if you're using the raceway as the grounding conductor in a critical care area then you have to meet the requirements of 517.19(D)(1-3). I'd like someone elses interpretation of that though to be sure.
 
Wasn't it you Rog awhile back that said the conduit/raceway was preferred method of utilizing EGC in Health Care facilities you've been involved with??
 
This feeder run will include an equiptment grounding conductor. In the past the ACHA inspector has had us add a bonding bushing even though there is an EGC included with the feeder conductors. When, if ever, can you omit the bonding bushing?
 
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