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#26615 - 06/16/03 06:16 PM Grounding Rods
LuminateME1 Offline

Registered: 03/06/03
Posts: 25
Loc: Seattle,WA,USA
What is the purpose of two grounding rods? And, what is the code for distance between the two?

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#26616 - 06/16/03 07:06 PM Re: Grounding Rods
spkjpr Offline

Registered: 12/01/00
Posts: 226
Loc: Sedalia,MO, USA
Used for the code section about less than 25 ohms on ground rods or install 2 rod. the distance is not less than 6' apart Reference is 250.56 or .58 in 99 NEC, sorryI'm not under 2002 NEC yet.

#26617 - 06/17/03 04:53 PM Re: Grounding Rods
Steve Miller Offline

Registered: 08/30/01
Posts: 322
Loc: Loudoun Cty, VA
The purpose is to insure a resistance of <25 ohms. Some of our local jurisdictions will allow only 1 if we want to set up the megger and prove to them that it's <25 ohms. Needless to say it's cheaper, quicker and easier to just install 2


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