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OT: One last shed wiring question (with illustration)

I

IHC Red

Member
The illustration shows my situation.

Do I connect the bare wire from the supply line to the isolated ground block ?

Thanks.

<IMG src="http://img23.imageshack.us/img23/1891/groundl.jpg">
 
Are you feeding a breaker in the shop panel with your 10 3 g. If you have the space install a double pole 30 amp breaker and attach the wiring from the house to that. That way you will have a main in the shop.
 
YES YES YES in my professional electrical engineers opinion that is, you MUST connect the equipment GroundING conductor you brought from the main panel to the Equipment Ground Buss in the remote sub panel. Otherwise how does a fault have a low resistance return current path??

HOWEVER AT THE MAIN PANEL THE EQUIPMENT GROUND BUSS AND NEUTRAL BUSSES MUST BE BONDED, your drawing doesnt indicate that????

NOTE Consult local authority and do as they instruct over anything posted here be it lay or even professional including mine as although I was an electrical power distribution design engineer for most of mny life, Im retired and rusty on the latest codes

John T
 

Yes the neutral and ground are bonded at the main panel (although the illustration doesn't show that).

I will make the connection tomorrow.
 
I see what you mean. In my application, the neutral is isolated and the ground is bonded.

Thanks again.

Here is an updated image.

ground2.jpg
 
You said, "Yes but in the shop box you show a green screw in the neutral bar. Remove that. The neutral is supposed to be isolated from ground".
I see the shop box neutral is grounded at the house box. So, how is that "isolated from ground"?
Both neutral/ground busses in both boxes are grounded. Am I also correct in saying that both neutral/ground busses in the house box were grounded?
Even before the shop box was added.
 

Sorry I can't answer your question, but what did you use to make your drawing? Or did you rob the pic somewhere else?

Thanks.
 
Main panel does show the ground bond to the neutral via the green bonding screw. The sub panel needs the neutral bar bonding screw removed. Sub panel needs a 10ft ground rod tied to the ground bar.
 
If the neutral bar isn't floated, the neutral current has a secondary path through earth . A problem as live stock will be shocked due to tingle voltage. Also if the neutral ever fails, grounded equipment can have 120V on the metal case.
 
Hey dude, John T is a degreed EE and may even be a PE registered in the state of TX. Spent his career in power transmission and added a law degree.

You always have something to say but never forfeit your background/education so that the average joe/jane can decipher whether you are just blowing smoke and flapping you yap or yielding some intelligent information.

Soooooooo.

Mark
 
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