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Old 03-26-2013, 04:10 PM   #1
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Default Do I need a bonding bushing?

I have an outdoor 200amp 1 phase nema 3r meter, disconnect, then intersect panel. Which ones do I need to put bonding bushings? Also, I know the meter does not need to be grounded anymore, so if I take the grounding electrode straight in the bottom of disc, do I need attach it to the bonding bushing?
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Old 03-26-2013, 04:15 PM   #2
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Quote:
Originally Posted by Curtlee View Post
I have an outdoor 200amp 1 phase nema 3r meter, disconnect, then intersect panel. Which ones do I need to put bonding bushings? Also, I know the meter does not need to be grounded anymore, so if I take the grounding electrode straight in the bottom of disc, do I need attach it to the bonding bushing?
You can bring it to the bushing first and have it continuous. Or, you can use a jumper from the grounding bus to bushing. Either way meets the code minimum.
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Old 03-26-2013, 04:56 PM   #3
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The metallic nipple that contains the unfused service conductors needs to be bonded.

That's my take on it anyway.
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Old 03-26-2013, 05:35 PM   #4
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Quote:
Originally Posted by Curtlee View Post
I have an outdoor 200amp 1 phase nema 3r meter, disconnect, then intersect panel. Which ones do I need to put bonding bushings? Also, I know the meter does not need to be grounded anymore, so if I take the grounding electrode straight in the bottom of disc, do I need attach it to the bonding bushing?
I don't know what a meter disconnect then intersect panel means.

The bonding bushings need to be used on the line side of the first disconnect means or in the meter. The grounding electrode conductor can be run to the first disconnect but you do still need to bond the bonding bushing with a bonding jumper sized to T. 250.66
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Old 03-26-2013, 05:46 PM   #5
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If this is a meter/main combo incorporating an MBJ , there are no service conductors past it

If you wish to make the GEC onto a G-bushing,ask the poco, it may not be acceptable , as many require a solid (not metal casing of meter) bond bettween the two

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Old 03-26-2013, 10:41 PM   #6
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The bonding bushings need to be used on the line side of the first disconnect means or in the meter.
Does anyone know a code reference for this?
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Old 03-26-2013, 11:44 PM   #7
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Do you only need a Bonding bushing when you have a concentric knockout?
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Old 03-26-2013, 11:54 PM   #8
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Does anyone know a code reference for this?
(B) Method of Bonding at the Service. Bonding jumpers meeting the requirements of this article shall be used around impaired connections, such as reducing washers or oversized, concentric, or eccentric knockouts. Standard locknuts or bushings shall not be the only means for the bonding required by this section but shall be permitted to be installed to make a mechanical connection of the raceway(s).

Changed From 2008

250.92(B): Revised to clarify the limitation on the use of standard locknuts for bonding at service equipment.


Standard locknuts, sealing locknuts, and metal bushings are not acceptable as the sole means for bonding a raceway or cable to an enclosure on the line side of the service disconnecting means regardless of the type of or condition of the knockout.
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Old 03-27-2013, 12:36 AM   #9
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Dis not Dat
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Old 03-27-2013, 01:06 AM   #10
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These are ok. I have ton's of new/old ones for sale if interested
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Old 03-27-2013, 01:17 AM   #11
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Use PVC
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Old 03-27-2013, 01:39 AM   #12
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Quote:
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Do you only need a Bonding bushing when you have a concentric knockout?
Service conductor nipples or concentric KO's over 250V to ground.
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Old 03-27-2013, 02:46 AM   #13
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Yes, any side is ok, just make sure its bonded with a thick enough jumper. Think at least normal water bond size.
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Old 03-27-2013, 11:01 AM   #14
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these are ok. I have ton's of new/old ones for sale if interested
wrong finger !
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