[Boatanchors] RE: Grounding

[Gary Schafer]

Daves comments should be well taken. Just to clarify, you can have as 
many ground rods as you desire but they ALL need to be bonded together. 
NEC requires it too.

73
Gary  K4FMX

Dave Maples wrote:
> All: The neutral and ground are to be bonded together at the first point of
> disconnect per the National Electric Code or NEC (which most local
> jurisdictions pick up without modification).  For residential service that
> is sometimes the meter base and is sometimes the load center (i.e. breaker
> panel).
> 
> The comment about bonding neutral and ground together elsewhere is a good
> one.  That should be avoided.
> 
> The idea of having a ground rod separate from the AC main ground rod is
> unwise.  I work for Nextel in engineering, and one of the things I am
> responsible for is grounding of our cell sites.  In those sites we ensure
> that the power ground at the cell site, the telco ground, and the ground for
> the antenna arrestors are, if not on the same master ground bar, tightly
> bonded together.  We also place an arrestor on EVERY lead entering the
> shelter, aand bond those arrestors tightly to the master ground bar.  We
> ground coax cables to antenna supports (i.e. towers) at several places.  We
> have ground rings around towers with multiple connections to the tower legs,
> and multiple ground rods bonded to the ring.  These ground rings are bonded
> to a ground ring around the shelter or cabinet, which in turn has multiple
> ground rods bonded to it as well.  That may sound like considerable work but
> it pays off over and over again even if we take direct hits (and our sites
> do, just like other folks' sites).
> 
> There are numerous good standards on grounding of radio equipment, but we
> have generally followed Motorola R-56 (kinda natural, since Nextel uses
> Motorola iDEN equipment).  R-56 generally tracks with similar standards from
> other cellular carriers and LMR equipment manufacturers..  It has an
> extensive standard for grounding.  IEEE also has a good book on grounding as
> well.
> 
> For what it's worth...all replies welcome, of course.
> 
> Dave WB4FUR
> 
> =================================================================
> 
> 
>><SNIP>
>>Is there any situation when it would not be advisable to use
>>the 3-wire cord on test equipment or ham gear?
>>73, Dick KF4NS
> 
> 
> 
> I'm sure everyone knows this, but DEFINITELY do not use three wire cords on
> the AC type AM broadcast radios.  Thats the only thing that comes to
> mind..........   I have my shack wired to a ground rod that is separate from
> my house AC wiring.
> 
> Just my 2 cents...
> 
> 73,
> Keith,  KK5FE
> 
> *******************************************
> 
> 
> _______________________________________________
> Boatanchors mailing list
> Boatanchors at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/boatanchors
> ** List Administrator - Duane Fischer, W8DBF/W9WZE **   
> ** For Assistance: dfischer at usol.com **         
> $$ For vintage radio info, see the HCI web site $$      
> http://www.w9wze.org    
> 
> 
>