[TowerTalk] Grounding of cables to tower? (N3AE)

[Jim Thomson]

Date: Thu, 19 Oct 2017 11:20:46 -0700
From: Jim Brown <jim at audiosystemsgroup.com>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Grounding of cables to tower? (N3AE)

< Without the transformer but with ground carried between 
<buildings, a panelboard and earth ground are still required in the 
<second building but neutral and ground MUST NOT be bonded in that panel.

###  Thats cuz they want ALL fault current to travel through the ground conductor between the 
panels...and NOT the neutral.  Hence neutral + ground bonded at main panel only....where your drop wire comes
in  from pole pig out in street.  Sub panel has neutral + ground wires separate, NOT bonded  in sub panel.   Same deal
if a sub panel used inside a home.   I use a 100A  sub panel just to get from one side of basement to the other. Same deal,
neutral + ground bonded in main 200A panel..... but separated in 100A sub panel.   




> A 15 kVA "dry transformer" is about $500

###  That seems pretty  cheap for a 15 KVA  CCS  xfmr.  Electrician ham buddy uses those, when say a cottage
out in the back 40, is a long way  from main house, and  you dont want voltage drops.   Typ they have a 240 vac
primary....and a 600 vac sec  at house end....and a   600 vac primary..and 240  / 120 sec at cottage end.  Cottage
end may also have pri taps at 600, 580, 560 vac.   Then standard 600 vac rated wire used between the 2 x  xfmrs. 

Jim   VE7RF