Exothermic is a connection not soldered, could be crimp tubes or cad
welded as used on the tops of the ground rods. It is dangerous to cad
weld up in the air - the discharge could start roofing on fire or cause
other cables and site personel trouble, I always pack around the holes
with thumb gum used as the seal between building penetrations and in/out
bound lines, it is available in a number of styles which all have equal
integrity but the point I am trying to make is even when the wires are
wrapped with something around the mold body the sparks and discharged
copper spread wide and hot causing what looks like fireworks show. If
you have ever been near a shorted primary feeder and had your skin
filled with small copper balls you will know why not to do cadwelding
very far above grade, if anything goes astray it burns right thru face
sheilds, conventional clothing, needless to say skin, hair and eyes.
"Daron J. Wilson" wrote:
>
> > It would be smart to run a awg4 solid/bare copper wire to the top from
> a
> > wide spread grounding rod array and use this with split bolts along
> the
> > way for your antenna/s for grounding, the flange or slip joints don't
> > really do well after 5-8 years of oxidation and mechanical
> coating/paint
> > decay. You can be assured of a good system ground by following NEC
> > article 250, one thing that is tough to understand about the code is
> the
> > adding of grounding spurs using split bolts to other racks along the
> way
> > down or up depending on which side you are looking from - the
> grounding
> > of the service entrance and grid must be exothermic meaning crimps
> tubes
> > which can not be backed off with wrenches, extension of the grid may
> be
> > done any way fashionable with 250, meaning fence doorways can be made
> > flexible as desired but the main ground for the load center and the
> top
> > of the tower must never be allowed any adjustments or changes except
> for
> > additional conductor taps as needed.
>
> Thanks, that is a good idea. Just to clarify though, exothermic
> requirements refer to cadweld type connections, the other requirements
> are 'irreversible crimp' which refer to the sleeve or tube that is
> crimped and cannot be taken off.
>
> Daron J. Wilson, RCDD ) )
> Telecom Manager ( (
> LH Morris Electric, Inc. ) )
> (541) 265-8067 office _|****| mmm!
> (541) 265-7652 fax ( | | coffee!
> (541) 270-5886 cellular \| |
> [EMAIL PROTECTED] |____|
>
--
73...Clark Beckman N8PZD
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