bonding bushings

[Big Guns]

Do you need bonding bushing just on feed side of gear or do you need to put bonding bushings on feed side and at every junction box where emt conduit is leaving J.B going out to another piece of gear or 2nd J.Box.

 

[raider1]

Typically bonding bushings are only required on the line side of a service or in hazardous locations.

Take a look at 250.92 for bonding of services and 250.97 for bonding over 250 volts.

Chris

 

[RICK NAPIER]

And sometimes for voltages over 250 volts to ground 250.97.

 

[augie47]

BigGuns, the answer is often not that simple. You need to look at the entire ground path. In addition to making the determination as to if the conduit contains service conductors or conductors on a system >250 volts to ground, you need to look at the path.
For example, a metallic service conduit between a meter socket with the neutral bonded and a panel with the neutral bonded would only need a bonding busing (or other approved means) on one end of the nipple as you are only bonding the nipple (both enclosures are bonded by the neutral). If for example, the 2nd enclosure is not bonded by any means other than the nipple, you might need a bonding bushing on both ends to assure a low impedance ground path.

 

[ibew501ed]

augie
Very clearly stated ! I see many people understand the concept of using the neutral in the meter and the panel for bonding BUT don't realize the nipple needs 1 gnd bushing to complete the install