ECN Forum Forums Code Related Discussion NEC & other Code issues Acceptable Ground Rod?

Pierre, job trailers do require ground rods. RI wants two rods, but put iwire's trailer on the same site with your job trailer in RI. No rod needed for iwire, you will need 2 rods makes no sense.

Here's my 2 pennies.

"...this application requires a ground rod?" No, I see the refer box, assuming it is a shipping container or the like, as equipment. Not a structure, or intended to be used as a shelter of any kind. Grounded yes, rod/electrode no.

"...this ground rod is acceptable?" Heh, Heh... No! If it were the sole ground, it would be useless. ( I have seen rods this short used in antenna applications. 3-6 in a pattern around it. No idea what purpose they serve in that way, but...)

"...does the white need to be re-identified as it is used as an ungrounded conductor?" No. 200.7C(3)as mentioned earlier.

Want to laugh?
I received a call today from a contractor who has to install wiring to 12 trailers on a jobsite. 1 bathroom trailer, and the rest are classrooms. It is a school, where the classrooms will not be finished for September - a high school where the kids come from all over the world - and is $40,000.00 per year!!!
The trailers will be finished next week, just in time for me to inspect them when I come back from VACATION!
No services to them, all feeders.

Pierre

e57, the system for antennas is to form a ground plane. For a broadcast tower to be tuned properly, you need a dependable ground plane for a certain distance around the tower. I was involved in a new tower for an AM station and they had to trench #12 bare copper in a radial pattern out from the base a couple of hundred feet.

The only time I ever saw rods that size was military "antenna farms", I figured that was the purpose, but not sure. I guess since they're pumping all that voltage out to deep space, a difference in potential is pretty big as far as signal strength goes.

Thanks for the answer, it's always made me wonder...