Originally posted by tom baker
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Meter Socket Grounding
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My experience with 3 phase 480 delta is limited. I had one that was corner grounded, the fused disconnect had a bus bar in the b phase, with a jumper to ground.
do all the voltages read 480 to ground?Moderator-Washington State
Ancora Imparo
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Originally posted by tom baker View PostMy experience with 3 phase 480 delta is limited. I had one that was corner grounded, the fused disconnect had a bus bar in the b phase, with a jumper to ground.
do all the voltages read 480 to ground?
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Senior Member
- Jun 2003
- 11908
- NE (9.06 miles @5.9 Degrees from Winged Horses)
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Originally posted by mobo View PostAnd if someone could educate me...lol....I assume the reason the meter loop would need bonded to the grounded conductor (neutral) is in case of a short which could result in a shock hazard?
A few months prior to the area POCO mandating separate conduits, I found an up down loop that had one meter line side conductor shorted to the load conductor going back up that loop. We figured it out when the load side of the meter socket was still hot on one side after the meter was pulled. It could have been that way for years. Missed revenue for the POCO plus the safety aspect.Tom
TBLO
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Originally posted by ptonsparky View Post
Yes, a phase to the meter enclosure.
A few months prior to the area POCO mandating separate conduits, I found an up down loop that had one meter line side conductor shorted to the load conductor going back up that loop. We figured it out when the load side of the meter socket was still hot on one side after the meter was pulled. It could have been that way for years. Missed revenue for the POCO plus the safety aspect.
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Originally posted by texie View Post
No, I think you are referring to having a fault return path. All metallic items on the line side of a service disconnect have to be bonded as per 250.92
The grounding electrode system is in addition to this.
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Let me ask this......if you installed a bronze grounding clamp on the aluminum conduit (the up/down meter loop) just below the weatherhead and put a bonding jumper from the clamp to the grounded conductor (neutral), would this be considered approved?
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Originally posted by ptonsparky View Post
Do you own the meter loop or the POCO?
If you own it, do it over and bring the grounded conductor down in the meter loop. It does not need to go back up.
We can not have the line and load of that meter socket in the same raceway in this area. . The POCO does not supply up/down loops anymore. Only down, so a separate conduit back up for the load.
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Moderator
- Feb 2009
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Originally posted by mobo View PostLet me ask this......if you installed a bronze grounding clamp on the aluminum conduit (the up/down meter loop) just below the weatherhead and put a bonding jumper from the clamp to the grounded conductor (neutral), would this be considered approved?If Billy Idol is on your playlist go reevaluate your life.
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Moderator
- Feb 2009
- 10521
- Durango, CO, 10 h 20 min without traffic from winged horses.
- Wire pulling grunt
- Send PM
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Senior Member
- Jun 2003
- 11908
- NE (9.06 miles @5.9 Degrees from Winged Horses)
- Electrical Contractor
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Originally posted by mobo View Post
Wow, interesting. Thanks for that knowledge. Isn't there a fuse that should have blown or something though?
Tom
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