A brief summary of the current NEC provisions for grounding of radio and TV receiving and transmitting equipment is available here: http://www.mikeholt.com/newsletters.php?action=display&letterID=284
Something to bear in mind is that, in general, most jurisdictions don't bother enforcing the NEC for amateur radio antennas (so don't go out and buy all that AWG 10 Copperweld for your rhombic just y
"Something to bear in mind is that, in general, most jurisdictions don't bother enforcing the NEC for amateur radio antennas" Which actually is too bad because these guidelines are exactly the measur
Which is fine if your shack is in an optimal location so that you can do everything by the book, but what if it's on the second floor of an old house? I attempt a single-point ground in the shack, bu
Even though a second floor shack is not optimum, installing a well designed grounding system is not out of the realm of possibilities. Polyphaser has a good technical article discussing exactly this
Actually, I took a direct hit on my 40M yagi some 3 years ago, about 200 feet from the house and 100 feet in the air. Thanks to disconnection, I lost nothing on the radio side in the shack. Unfortuna
My problem, which I have been mulling over for months now, is somewhat unique. My electric service is underground, running about 450' from the service transformer to the polebarn garage in the rear o
Did you have a SPG? Was it tied to the service entrance ground? How about a shack ground and the computers tied to that? Most likely is that strike induced current in your house wiring and that found
My electric service is underground, running about 450' from the service transformer to the polebarn garage in the rear of the property. At that point there is a SPG for the electric service, but then
Don, The easiest thing for you to do would be to install your panel as you propose where the cables enter the house and put the protectors on the panel for all the RF and rotor cables etc. Having the
Each of Phil's posts have been right on about grounding. I'll add another important point that seems to be overlooked by many here on the topic of surge protection. MOV surge protection is a really b
On the one hand, as a P.E., I'd like to see the NEC enforced, it being generally a "good idea". On the other hand, as a tinkering ham, I'd like to see the authorities have some discretion, particular
TT: I found a large reference, (>800 pages, .pdf) from the Military about grounding...pretty comprehensive... http://www.afspc.af.mil/shared/media/document/AFD-061120-007.pdf 73, DX, de Pat AA6EG aa6
Snipped preceeding discussions. I have a similar situation, except my modular sits on a Ufer cage basement (Concrete Encased Ground System, and then I have 18" wide steel I-beams overhead. The servic
Nothing in the NEC would prevent you from doing things on the second (or, for that matter, the tenth) floor. All it says is you've got to interconnect the grounds (in a specified way), keep things aw
There's yet another mechanism.. The MOV (or spark gap) fires, so there's now a "short" across the line, so the stored energy in the line up to that point discharges rapidly (just like in a tranmissio
Without actually seeing the installation I would recommend that you do a similar thing as I have described to Don below. It is not good to depend on a Ufer ground system as the primary ground system
I have a long underground power run as well. I was warned that while it helps in one way it may actually increase the possibility of ground surge coupling. WDYT? I opted for the power company whole-
Author: "WA3GIN @ Arlington County, VA" <wa3gin@erols.com>
Date: Fri, 08 Dec 2006 16:12:33 -0500
NOT TRUE IN ALL CASES: I used to have a 50KVA transformer on my property feeding my home and barn. My HV feeder is buried for approximately 3/4 of a mile. One wind storm last year the 21KV feeder abo