277v site ltg, 120v site receptacles, ground conductor
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Re: 277v site ltg, 120v site receptacles, ground conductor
No, just one conductor sized for the largest required EGC. (this is assumuing your term "ground conductor" is refering to "grounding" and not "grounded"
)
Roger
[ May 13, 2004, 01:52 PM: Message edited by: roger ]
No, just one conductor sized for the largest required EGC. (this is assumuing your term "ground conductor" is refering to "grounding" and not "grounded"
)Roger
[ May 13, 2004, 01:52 PM: Message edited by: roger ]
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Re: 277v site ltg, 120v site receptacles, ground conductor
I?m just curious. Once the five conductors (277V hot, 277V neutral, 120V hot, 120V neutral, and EGC) leave the conduit and enter the light pole, how do you connect the single EGC both to the receptacle?s ground screw and to the light pole?s external metal parts? Do you land on one, and then run a jumper to the other?
I?m just curious. Once the five conductors (277V hot, 277V neutral, 120V hot, 120V neutral, and EGC) leave the conduit and enter the light pole, how do you connect the single EGC both to the receptacle?s ground screw and to the light pole?s external metal parts? Do you land on one, and then run a jumper to the other?
Re: 277v site ltg, 120v site receptacles, ground conductor
I was reading through some of the old threads and found this one http://www.mikeholt.com/codeforum/ultimatebb.php?ubb=get_topic;f=18;t=000732#000000 and it sounded like one guy wanted separate ground wires and the other did not. So I wanted to verify which was correct, so I did not feel like i was losing my mind. Sometimes it just falls out that ear hole. Most times I find it again.
I was reading through some of the old threads and found this one http://www.mikeholt.com/codeforum/ultimatebb.php?ubb=get_topic;f=18;t=000732#000000 and it sounded like one guy wanted separate ground wires and the other did not. So I wanted to verify which was correct, so I did not feel like i was losing my mind. Sometimes it just falls out that ear hole. Most times I find it again.
caosesvida
Senior Member
Re: 277v site ltg, 120v site receptacles, ground conductor
you will be coming from two different panels, with two different load sizes... I guess I would bring one from each panel ( with respect to size)because if you lost one (maybe someone working on one circuit taking off the grounding wire) bond them together at the first point. Then go with the largest to the pole, split them again, Hmm maybe it would just be as easy to run two separate grounding conductors?
you will be coming from two different panels, with two different load sizes... I guess I would bring one from each panel ( with respect to size)because if you lost one (maybe someone working on one circuit taking off the grounding wire) bond them together at the first point. Then go with the largest to the pole, split them again, Hmm maybe it would just be as easy to run two separate grounding conductors?
Re: 277v site ltg, 120v site receptacles, ground conductor
At some point, the two circuits came out of the panels in separate raceways and then grouped together downstream to site lights.
I think it's a good practice to run a grounding conductor with the circuit conductors in the same raceway. Also, using one grounding conductor from either circuits, which were installed in a separate raceway at some point, might be in violation of 250.134, and it provides a potential path for circulating ground current in both circuits.
At some point, the two circuits came out of the panels in separate raceways and then grouped together downstream to site lights.
I think it's a good practice to run a grounding conductor with the circuit conductors in the same raceway. Also, using one grounding conductor from either circuits, which were installed in a separate raceway at some point, might be in violation of 250.134, and it provides a potential path for circulating ground current in both circuits.
Re: 277v site ltg, 120v site receptacles, ground conductor
You shouldn't"t need but one "equipment grounding conductor" rising up in one raceway into the pole base for for?fixture head and said receptacle device back to a common junction box where the three raceways can meet. However,you will have two separate "grounded conductors". Visit art#200.6(D)
You shouldn't"t need but one "equipment grounding conductor" rising up in one raceway into the pole base for for?fixture head and said receptacle device back to a common junction box where the three raceways can meet. However,you will have two separate "grounded conductors". Visit art#200.6(D)
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