Grounding Electrode

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RESI

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Here's the situation: Residential 400 amp meter base with 2, 200 amp disconnect boxes mounted next to it. Main house panels (2) are located about 15 feet away. My question is: Does each 200 amp disconnect have to have its own ground rods or can I just use one set of ground rods for both disconnects? Thanks for all who reply! :confused:
 
RESI said:
Here's the situation: Residential 400 amp meter base with 2, 200 amp disconnect boxes mounted next to it. Main house panels (2) are located about 15 feet away. My question is: Does each 200 amp disconnect have to have its own ground rods or can I just use one set of ground rods for both disconnects? Thanks for all who reply! :confused:
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Let's assume you cannot get 25 ohms then I would say you need one pair of rods (two) connected together and you can either land the GEC in the meter (if allowed) or you can take 2 GEC's -- one from each panel-- never installed the service the second way but i believe it is legal
 
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Dennis Alwon said:
Let's assume you cannot get 25 ohms then I would say you need one pair of rods (two) connected together and you can either land the GEC in the meter (if allowed) or you can take 2 GEC's -- one from each panel-- never installed the service the second way but i believe it is legal
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Don't you mean one from each "disconnect" :-?
 
Yes, you can share the electrode(s).
You can also install one common grounding electrode, such as from the water pipe, and then connect the conductor from the ground rod(s) to the common grounding electrode. The connection can be by a split bolt or other means, including a lot of manufacturers products that are now available.

This will help to eliminate more conductor(s) from entering the enclosure/disconnect.
 
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