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-   -   sub panel in garage question ( grounding) (http://www.diychatroom.com/f18/sub-panel-garage-question-grounding-164178/)

onebladerz 11-20-2012 10:25 AM

sub panel in garage question ( grounding)
 
Hello

I am installing a new sub panel in my garage.

I am running 6-3 tech wire to the panel from my 100 amp panel in the house.

The sub panel will be on a 50 amp breaker.

I understand that I need some form of grounding for the panel at the garage.
Can I use a grounding plate or do I have to use grounding rods?

How deep does the plate need to go?

Thanks

J. V. 11-20-2012 10:28 AM

If the garage is attached to the house, you need only an EGC. If the garage is not attached to the house, you need the EGC and ground rods. So what you got? Attached or unattached?

Whats tech wire?

onebladerz 11-20-2012 10:35 AM

not attached to the house

Teck wire is armored exterior direct burial wire.

What is the EGC?

oleguy74 11-20-2012 10:37 AM

EGC = equipment grounding conductor.

ddawg16 11-20-2012 10:39 AM

Earth Ground Connection....

Basically.....you sink 2 ground rods at the grarge....6-8' feet apart....you connect that ground to the ground buss in your sub panel. You ALSO connect the ground from your load center to the ground buss.

You do NOT connect the neutral and ground together in the sub.....

If your sub is like most....you will need to pick up ground buss to install in the sub.

Plate? Haven't heard that one......unless your talking about an Ufer ground....

Do the rods....keep it simple.

Jim Port 11-20-2012 10:59 AM

Sounds like the OP is in Canada.

oleguy74 11-20-2012 11:00 AM

ground plates were used for years.just a flat ground rod.telco's used huge copper plates for CO grounds.ours were like a 4x8 copper sheets 1/2 to 3/4" thick.they are buried instead of driven in.nec ref 250.56.250.52(A)(6).250.53(h).

curiousB 11-20-2012 11:42 AM

Well a 4' x 8' x 1/2" sheet of copper will cost you about $2,604 at today's copper spot rate. Maybe the ground rods would be a tad bit cheaper......

oleguy74 11-20-2012 12:13 PM

Quote:

Originally Posted by curiousB (Post 1056977)
Well a 4' x 8' x 1/2" sheet of copper will cost you about $2,604 at today's copper spot rate. Maybe the ground rods would be a tad bit cheaper......

that is for office ground.they can be copper plated but yes a ground rod is ok.that was an example for d dwagg as he seemed not familler with plates.you can get copper-weld plates just like ground rods.


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