2-2-2-4 Aluim. To Main Lug HELP PLEASE - Electrical - DIY Chatroom Home Improvement Forum


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Old 09-10-2010, 08:32 AM   #1
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2-2-2-4 aluim. to main lug HELP PLEASE


OK, I have a 200amp main panel in my house. I ran 2-2-2-4 220ft aluim. underground to my barn(it was cheap). In the barn i wired a total of five curcuits. in the main lug there is no bus for a ground. What do i do with wire #4? Do i need a ground rod at the main lug? If so do i put the 4th wire(ground) into the neutral bus and ground it with a rod? Also i was going to put this wire in a 60 amp breaker at the house, will a 2 awg wire even fit in there(I didnt buy one yet)? If not what should i do? Your help is appreciated already!!

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Old 09-10-2010, 08:48 AM   #2
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2-2-2-4 aluim. to main lug HELP PLEASE


Take a look here:

http://ecmweb.com/grounding/electric..._vs_bonding_5/

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Old 09-10-2010, 09:10 AM   #3
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2-2-2-4 aluim. to main lug HELP PLEASE


Add a ground bar/lug to the panel. The ground and neutral must be kept separate.
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Old 09-10-2010, 09:15 AM   #4
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2-2-2-4 aluim. to main lug HELP PLEASE


You will need to buy and install a ground bar. Many times these panels will say on the box that the ground bar is not included. The neutral bar must be isolated from the panel case - it is usually mounted in standoffs. The ground bar will be screwed directly to the case. Yes, you need ground rod(s). All the ground wires will go to this bar.
The breaker will state what size wire it will accept.

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Old 09-10-2010, 10:03 AM   #5
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2-2-2-4 aluim. to main lug HELP PLEASE


Quote:
OK, I have a 200amp main panel in my house. I ran 2-2-2-4 220ft alum. underground to my barn(it was cheap). In the barn i wired a total of five circuits .. in the main lug there is no bus for a ground.
Quote:
What do i do with wire #4?
As mentioned you buy a ground bar for that model panel not another manufacturer. There will be swaged holes in the back of the panel that will allow you to bond the bar to the panel with screws included with the ground bar kit.

Quote:
Do i need a ground rod at the main lug?
Not at the neutral main lug. You will run a #6 solid copper (bare) and terminate it to the ground bar you install. The ground rods will be 8 ' you will attach the #6 using ground rod clamps approved for direct burial.


Quote:
If so do i put the 4th wire(ground) into the neutral bus and ground it with a rod?
Absolutely not see above


Quote:
Also i was going to put this wire in a 60 amp breaker at the house, will a 2 awg wire even fit in there?
Most 60 amp breakers will take a maximum #2 awg. That is probably the largest breaker you should use at that distance (220 ft).


A few helpful visual aides for you to look at for your installation






If you direct buried your feeder the only difference will be the burial depth which would be 24".
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2-2-2-4 aluim. to main lug HELP PLEASE-feeder-sub-panel-1.jpg  
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Old 09-10-2010, 10:17 AM   #6
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2-2-2-4 aluim. to main lug HELP PLEASE


Ground bar kit




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Old 09-10-2010, 10:27 AM   #7
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2-2-2-4 aluim. to main lug HELP PLEASE


When you terminate your branch circuits equipment grounds and feeder equipment ground (the #4) and the ground rod grounding electrode conductor (#6) they will land on this ground bar.

Your grounded legs..ie..neutrals (white insulated wires) will land to the neutral bar on the insulated standoffs where your feeder neutral is connected.
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Old 09-10-2010, 10:32 AM   #8
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2-2-2-4 aluim. to main lug HELP PLEASE


And that ground bar clamp goes on BEFORE you start hammering your ground rod into the ground. Otherwise, the top will be so mushroomed out that you'll spend a good 20 mins with a file trying to get it to fit.


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Old 09-10-2010, 10:49 AM   #9
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2-2-2-4 aluim. to main lug HELP PLEASE


Thank you all for quick responses - I now know what i need to do!!

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