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grounding fields? theory #58294
11/05/05 01:03 AM
11/05/05 01:03 AM
N
NJI  Offline OP
Member
Joined: Jul 2005
Posts: 33
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.


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.
Work Gear for Electricians and the Trades
Re: grounding fields? theory #58295
11/05/05 08:09 AM
11/05/05 08:09 AM
R
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
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


Don(resqcapt19)
Re: grounding fields? theory #58296
11/05/05 10:45 PM
11/05/05 10:45 PM
N
NJI  Offline OP
Member
Joined: Jul 2005
Posts: 33
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.
Re: grounding fields? theory #58297
11/05/05 10:47 PM
11/05/05 10:47 PM
L
Larry Fine  Offline
Member
Joined: Feb 2005
Posts: 693
Richmond, VA
No, it's bond neutral to ground, or 4-wire.


Larry Fine
Fine Electric Co.
fineelectricco.com
Re: grounding fields? theory #58298
11/05/05 10:53 PM
11/05/05 10:53 PM
R
Roger  Offline
Member
Joined: May 2002
Posts: 1,716
N.C.
NJI, read 250.32

Roger

Re: grounding fields? theory #58299
11/05/05 11:14 PM
11/05/05 11:14 PM
N
NJI  Offline OP
Member
Joined: Jul 2005
Posts: 33
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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