critique my grounding detail

[lowwattbulb]

After finishing a Grounding vs. Bonding course by you know who, I started to put down on paper a lot of the stuff that was in my head. (To make room for more important stuff like the 2 hr season finale of 24)

The attached picture (assuming I can figure out how to attach it) is the result.

I am thinking about using it as a general grounding and bonding detail. I
have no desire to restate article 250 just highlight what I expect contractor to install. Let me know what you think.

Thanks
http://img140.imageshack.us/img140/2527/groundingandbondingriser3ab.jpg

 

[infinity]

Here is your drawing:

 

[dereckbc]

The drawing is good, very generic, and looks like any you would see for a building containing sensitive electronic equipment. The problem is detail and implementation. For example where are you going to find a grounded circuit bus (neutral) with that many open positions..

The solution is simple but may not be obvious to some. You simply install a ground bus bus outside the service entrance enclosure but as close as practical to interconnect all the bonding conductors, then run a single conductor to the Neutral bus to form a SPG

 

[bdarnell]

The solution is simple but may not be obvious to some. You simply install a ground bus bus outside the service entrance enclosure but as close as practical to interconnect all the bonding conductors, then run a single conductor to the Neutral bus to form a SPG

Like THIS

 

[ryan_618]

1) Why the ground rods?
2) I would specify the common GEC as being 3/0 Cu, as required in 250.30.
3) I would lose the second sentance of note 3.
4) On the limited energy side you specify "#6". I would change it to 6 AWG, so it is consistent with the NEC.

 

[iwire]

I assume this is supposed to a generic, cover all the bases drawing?

Normally if you have a building steel connection you are not likely to have a transformer common grounding electrode as well.

Dereck you must be a hands on kind of guy as the first thing that I noticed was the number of connections to the neutral bar. 8)


If it is not a building that is especially 'sensitive' :wink: you could use building steel as the common grounding bus for all other electrodes, bonds etc.

 

[petersonra]

if i did this kind of work, i would be inclined to "borrow" your drawing.