gec gnd ring

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hhsting

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Glen bunie, md, us
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Junior plan reviewer
I have outdoor transformer on concrete pad customer owned has grounding electrode conductor size 3/0 awg to 4/0 ground ring and concrete pad rebar.

questions:

1. Can ground ring by itself qualify as electrode?

2. Not sure why GEC would also connect concrete rebar its not an electrode?

3. 4/0 Awg ground ring with GEC sized 3/0 Awg. Is the GEC sized properly or has to be 4/0 Awg?

4. Can gnd ring itself qualify as electrode or has to be supplemented by gnd rods every 20 feet?
 
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roger

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Fl
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Retired Electrician
Spend some time reading through Part III of article 250.

Roger
 
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