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Thread: electricial shock possible?

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  1. #31
    Join Date
    May 2003
    Location
    Everett, WA USA
    Posts
    5,053

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    Quote Originally Posted by K8MHZ View Post
    Very nice! But the CU strap is actually not *exactly* up to code. The NEC requires wire conductors. Of course, they are completely wrong. Your set up is great, but violates the minimum grounding conductor size requirements of the NEC.
    Thanks Mark,

    The building inspector (who was here only moments ago) didn't say anything about it. But then, he also didn't say anything about my rebar not being precisely per the PE's approved drawing. I have MUCH more ground system work coming after the concrete pour, and can deal with that strap at that time.

    The drawing for the tower calls for at least one ground rod per tower leg, bonded together and to the ground system. I also want to move the shack ground rod closer to the ground buss. At the same time, I have 500' of wire to add for a radial field for a 80m/160m antenna I'll feed against ground on 160m. But first, I need to pour > 7.5 yd3 of concrete. I'm hoping to be causing more QRM before Field Day!
    vy 73,
    Bryan WA7PRC

  2. #32
    Join Date
    Oct 2007
    Location
    Central Minnesota EN25uo
    Posts
    27

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    Quote Originally Posted by KD2AAG View Post
    hello everyone i am a newly licsened ham heres the problem i moved to a new appartmet i operrate on mostly 10 meters running 200 watts pep well all my equipment is grounded amp radio power supply along with the an tenna . my amplififier is capable of atleast 800 watts pep and is a tube amp i drilled through the basemen t flloor put a 5/8 x 8 foot ground rod ,antenna has a 10foot x 5/8 rod well my neighbor in same building is complaning of electricial shock is this at all possible ?
    A short answer. Not enough information. Installation does not meet National Electrical Code. With what information you provided shock seems unlikely. Damage to your equipment and or radio frequency interference is much more likely. Having an electrician complete your grounding would probably make your neighbor feel better although RF grounding is poorly understood by many licensed Electricians.
    Advise. Try to make your neighbor happy before he causes trouble. This site is a well of information on grounding although there is some bogus info mixed in with the gold. W8JI has much useful information on his site about grounding.

    Good Luck
    Larry

  3. #33

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    Quote Originally Posted by KD2AAG View Post
    hello everyone after further inspection the problem is the wiring in the appartment , and noww these people see antennas and i am the blame well i have only 6 months left on the lease so they are "sol" i have done everything possible on my end i drilled through basment for were equipment is drove a 5/8 x 8 foot ground rod were all equipment is contected but shortest possible conection antenna is also conntected to ground by 2 - 5/8 x 10foot ground rods . also replaced the the all the equipment in the shack from power supply to amplifier this was a perfect excuse for me to use to talk the xyl into new equipment thank you all who replied all suggestion helped 73s
    The first mistake was "drilling through the basement floor." You do NOT want your ground anywhere INSIDE a structure. That's inviting a near or direct lightning strike to wreak havoc on anytging or everything inside the structure.
    Secondly, for safety, ALL grounds MUST be tied to the electrical service ground. Should a problem or fire occur, an insurance company could reject any or all claims, and hold YOU legally and financially responsible for creating a hazard.

  4. #34

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    Quote Originally Posted by WA9SVD View Post
    The first mistake was "drilling through the basement floor." You do NOT want your ground anywhere INSIDE a structure. That's inviting a near or direct lightning strike to wreak havoc on anytging or everything inside the structure.
    In a lot of industrial applications, a ground rod inside the building is a requirement, and yes, I've seen lightning damage due to this, but, I've also seen that alleviated by bonding all indoor ground rods to an outdoor one. I never quite understood why, but it does work.

  5. #35

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    Quote Originally Posted by N2RJ View Post
    Hey nice apple logo.
     is shift-option K on UNIX-based computers? I often use option-Z -- which is Ω.
    • Rich, AG6K, www.somis.org 805-386-3734

  6. #36
    Join Date
    Apr 2009
    Location
    RIO RANCHO - NM
    Posts
    298

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    Quote Originally Posted by KD2AAG View Post
    hello everyone ...... problem ...... i moved to a new appartmet i operrate on mostly 10 meters running 200 watts pep well all my equipment is grounded amp radio power supply along with the an tenna ........ i drilled through the basemen t flloor put a 5/8 x 8 foot ground rod, antenna has a 10foot x 5/8 rod well........
    I gotta ask! Did the apartment owners give permission for all the "drilling" through THEIR concrete basement floor?

    If they did - you are a lucky ham!If they did NOT --- what about YOUR liability should those ground rods somehow offer a reason for injury to someone? Tripping over the portion that protrudes (if it in fact does)? Lightning following the path and damaging the INSIDE the building? OMG! Any damage one can imagine for that matter.

    I'm not bustin' yer hump - I'm just curious if they gave permission and if so - how many hoops you had to jump through to obtain said permission?

    I know. I know. I'm creatin' issues unrelated to the question. But - are the issues "really unrelated" or a BIG part of the "what if" aspect?

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