N&W icons: the singularly N&W 440-volt line on poles -- and the preceding photo of RS11s on a coal train

[nw-mailing-list at nwhs.org]

nw-mailing-list at nwhs.org wrote:      P  {  margin:0px;  padding:0px  }  body  {  FONT-SIZE: 10pt;  FONT-FAMILY:Tahoma  }         Thank You, Gordon, and since You talked to a couple of fine retired N&W Signalmen about this, there seems to me to be no reason NOT to believe this explanation.  I thought this "expert" approach would work -- usually does...Thanks again, Lloyd Lewis....Now about that b&w photo of the several ALCo RS-11s up front on the coal train that preceded this question....Anyone know the location?? 
    
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  To: nw-mailing-list at nwhs.org
Date: Tue, 1 Aug 2006 21:17:18 -0400
From: nw-mailing-list at nwhs.org
Subject: Re: N&W icons: the singularly N&W 440-volt line on poles
    I talked with a couple of retired N & W Signal Department people about this subject to be certain that my feeble memory was correct.
  The offset bracket on the top of signal line poles is called a "bayonet."  It carries a "ground" or "static" line that is grounded at every fourth or so poles by a wire that runs from the static line down the pole to a stake in the ground.  The purpose of the static line is to provide a low resistance path to ground for lightening strikes.  The purpose of the offset in the bayonet is to accommodate the insulator and one wire of a three-phase, 4400-volt signal power circuit on top of the pole.  The two other wires of the three-phase circuit are carried on insulators at either end of a cross arm below.  Gordon Hamilton
    ----- Original Message ----- Thanks Gordon, that makes sense -- Ron Hash
  From: nw-mailing-list at nwhs.org 
  To: N&W Mailing List 
  Sent: Monday, July 31, 2006 10:36 PM
  Subject: RE: N&W icons: the singularly N&W 440-volt line on poles
  Wrote Lloyd Lewis:  My Dad, who was The Virginian Railway's last Supervisor of Telegraph & Signals, told me this extra wire on the N&W's pole line above all the other numerous lines and crossarms was the perch upon which rested a special N&W-only 440-volt line....
      Abram Burnett: 
  Doesn't add up for me, Lloyd.
     1.)  Where's the other side of the circuit (the "neutral" or "return" wire) ?
     2.) 440 isn't enough juice to go very far.  I haven't done the calculations, but I'll bet you'd see a 50% line drop in voltage over a hundred miles.
     3.)  Other railroads, and mebbe even the N&W, were hanging 4,400 volts on poles and using it to light stations and drive AC signal systems, as early as 1911-1913.
     4.)  CTC code line is almost invariably shielded (insulated) because of its critical importance.
     I hope one of the museums can get a couple of N&W poles, crossarms and wire, and two of those distinctive angle brackets!
  -- abram burnett

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