I am researching a question. 200 Amp panel. Need to run underground service conductors to two spots in rear of property. How to calculate all this? 1. Determine distance? 2. Determine future potential load? 3. Go to two tables in NEC correct?
Hello , if I am installing a Temporary Main 100amp Outdoor Electrical Service Panel with 2 ground rods 6 feet apart within 3 feet of a Shed Sub Panel . Will I be required to add two more ground rods at the Shed Sub Panel? Even; if, I have Main and Sub Panel bonded to same two Ground Rods ?
If you have a remote distribution panel in the detached structure, in your case a shed, you would indeed be required to establish a grounding electrode system at the shed. Now, if the main panel and shed with remote panel are that close, nothing says you can't use the same ground rods if you wish.
You invest in a 3-point fall of potential meter or an Ground Resistance Meter which are expensive. Here is the cheaper option - www.fluke.com/en-us/learn/blog/grounding/earth-ground-fall-potential But, its probably easier to just put in (2) ground rods.
![Auxiliary Grounding Electrodes [250.54], NEC 2023, (10min:54sec)](http://i.ytimg.com/vi/4a8Kh5aLCB0/mqdefault.jpg)
Gentlemen, Great work on Article 680 part One. I was on panel 20/17 from 1993-2014.
You are one of the best in the business, referring to learning the electrical code,
Thank you Brother.
I appreciate your guidance..you are a true expert.
Very well explained and with good details
Glad you liked it
I am researching a question. 200 Amp panel. Need to run underground service conductors to two spots in rear of property. How to calculate all this? 1. Determine distance? 2. Determine future potential load? 3. Go to two tables in NEC correct?
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So the ground rods must practice Social Distancing as well?
LOL......
That was funny 😂
Hello , if I am installing a Temporary Main 100amp Outdoor Electrical Service Panel with 2 ground rods 6 feet apart within 3 feet of a Shed Sub Panel . Will I be required to add two more ground rods at the Shed Sub Panel? Even; if, I have Main and Sub Panel bonded to same two Ground Rods ?
If you have a remote distribution panel in the detached structure, in your case a shed, you would indeed be required to establish a grounding electrode system at the shed. Now, if the main panel and shed with remote panel are that close, nothing says you can't use the same ground rods if you wish.
👍 instructed
how are you testing 25 ohms or less
You invest in a 3-point fall of potential meter or an Ground Resistance Meter which are expensive. Here is the cheaper option - www.fluke.com/en-us/learn/blog/grounding/earth-ground-fall-potential
But, its probably easier to just put in (2) ground rods.
@@MasterTheNEC thank you that’s what I figured. It would be interesting to have one to experiment with. I never used one
Just ran into this with an inspector, couldn't understand how to accomplish this so I just threw in two rods 😂 thank you very much for the info!!!
Ufer