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#58294 - 11/04/05 10:03 PM grounding fields? theory
NJI Offline
Member
Registered: 07/14/05
Posts: 33
Loc: Oneonta, NY USA
can anyone explain the hazards of running a 4wire subfeed 120/240 AND puting in ground rods. Other than the fact that you shouldn't i'd like to brush up on the theory behind it.
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I have worked as an apprentice and on to a journeyman in a general construction company. 90% of what I do is residential. I have an associats degree in electrical technology. I have started my own buisness this year and am with out the help of other electricians. this is why i find this site so helpful.
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#58295 - 11/05/05 05:09 AM Re: grounding fields? theory
resqcapt19 Offline
Member
Registered: 11/10/00
Posts: 2148
Loc: IL
NJI,
Quote:
can anyone explain the hazards of running a 4wire subfeed 120/240 AND puting in ground rods. Other than the fact that you shouldn't i'd like to brush up on the theory behind it.

Who told you that you shouldn't do both? If the sub panel is at a second building and you pull an EGC, the code requires a grounding electrode system at the second building.
Don
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Don(resqcapt19)
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#58296 - 11/05/05 07:45 PM Re: grounding fields? theory
NJI Offline
Member
Registered: 07/14/05
Posts: 33
Loc: Oneonta, NY USA
As I have understude my AHJ one or the other. Can you give me my code references? I thought one or the other. four wire or three and a rod.
_________________________
I have worked as an apprentice and on to a journeyman in a general construction company. 90% of what I do is residential. I have an associats degree in electrical technology. I have started my own buisness this year and am with out the help of other electricians. this is why i find this site so helpful.
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#58297 - 11/05/05 07:47 PM Re: grounding fields? theory
Larry Fine Offline
Member
Registered: 02/18/05
Posts: 693
Loc: Richmond, VA
No, it's bond neutral to ground, or 4-wire.
_________________________
Larry Fine
Fine Electric Co.
fineelectricco.com
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#58298 - 11/05/05 07:53 PM Re: grounding fields? theory
Roger Offline
Member
Registered: 05/18/02
Posts: 1716
Loc: N.C.
NJI, read 250.32

Roger
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#58299 - 11/05/05 08:14 PM Re: grounding fields? theory
NJI Offline
Member
Registered: 07/14/05
Posts: 33
Loc: Oneonta, NY USA
thanks, i'v been searchhing past posts and am reading as we speak..workin on it
_________________________
I have worked as an apprentice and on to a journeyman in a general construction company. 90% of what I do is residential. I have an associats degree in electrical technology. I have started my own buisness this year and am with out the help of other electricians. this is why i find this site so helpful.
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