100amp feeder 175 feet away no ground from main panel to feeder

[ronnie-matic]

co-worker has side job, is going to run 100amp feeder to workshop 175 feet from main, he says he is going to run 2 hots and a neutral, no ground wire like s.e.r. cable. he is going to use 2 ground rods at workshop to make up for it. i told him he needs to run ground wire also an check for voltage drop at 175 feet. is he right, or am i wrong ,./,./,./

 

[roger]

See 250.32 (A) and (B) Voltage drop will depend on how much load he anticipates to be running at one time.

Roger

 

[ronnie-matic]

roger

roger

i know a feeder needs a seperate ground bar and neutral bar, aka floating neutral, i just want the unabridged answer , so i can know for my self, the short answer please ha ha.

 

[roger]

i know a feeder needs a seperate ground bar and neutral bar, aka floating neutral,

Not necessarily.

i just want the unabridged answer , so i can know for my self, the short answer please ha ha.

Did you read 250.32(A) and (B)? The answer for this scenario is there.

Roger

 

[Jim W in Tampa]

i know a feeder needs a seperate ground bar and neutral bar, aka floating neutral, i just want the unabridged answer , so i can know for my self, the short answer please ha ha.

He is ok long as no other connection to second building.What he is doing is creating a 2nd service just no meter.No cable ,no phone

 

[ronnie-matic]

thanks jim

thanks jim

the short answer is nice sometimes , i'm a 2 yr app. and nec is not always clear to me i'm trying to learn it all. it takes time.

 

[roger]

Ronnie, the short answer is, if there are no parallel grounded paths as Jim refers to, your co-worker has a compliant installation.

BTW, It might help if you include your apprentice status in your profile.

Roger

 

[ronnie-matic]

roger

roger

thanks for the code ref. theres alot to learn, i will update my profile, i need all the info i can get, i want to learn, i enjoy my job, thanks to all who help.

 

[acrwc10]

You said it all......

 

[paul]

Since the two of you were having a discussion about this, I'm fairly certain that he is also an apprentice. If this is true, it would be to his advantage to not do side jobs. Mistakes could be very costly.

 

[stew]

in washington we are required to run an equipment grounding conductor to any outbuilding . thus if we run a 120/240 volt feed we must use a 4 wire system and an egc system at the detached building. I agree with this requirement and believe it is a safer way to install.

 

[henry1223]

"Side Job" is the key word

 

[mark henderson]

Since the two of you were having a discussion about this, I'm fairly certain that he is also an apprentice. If this is true, it would be to his advantage to not do side jobs. Mistakes could be very costly.

If this is true, he is very correct. I have seen people loose there licenses and and be prosued legally for fires and faulty wireing!

When I was first learning electrical I ran 3 wires for 2 subpanels in a home I still wory about that coming back to bite me some day. I now have 15 years experance and would love a chance to go back and redo that one.

 

[kbrandt]

You can get your wire size with this formula: cm=2kil/vd