The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Topic Options
Rate This Topic
#153099 - 04/20/06 04:35 AM Old Phone Spark Gap?
electure Offline

Member

Registered: 12/24/00
Posts: 4226
Loc: Fullerton, CA USA
From sabrown

 Quote:
I was sent this picture and asked to identify it. You have my guess, but I
am just not up on a lot of the old things we have around, especially when
they are no longer in use. I assume that the large wire (is a wire and)
goes to a grounding electrode of some sort. If you know what we are looking at for sure let's hear it.

Background: This is located on the exterior of a small (1 room) guard station built the summer of 1941. Guard stations are typically a cabin for forest personnel to use, about a 1 day horse back ride from any others.
Though this building is called a guard station, it was actually used for
fire control and had a lookout located nearby. I do not think I have ever
been to this site, but typically there is evidence a phone line was run overhead through trees up the mountain from who knows where and terminated at the lookouts living quarters. The terminations that I have seen
have varied a lot from this site and though I have seen parts of this style before, this is the most complete.
These phone lines were used for reporting fire and were abandoned and most removed once radio came into use
(probably due to unpleasant shocks received while using the phone).

Shane




Top
Super Rod Cable Installation Tools

Super Rod Cable Rod System
Super Rod Cable Rod System -
Voted
Best Product of the Last 50 Years by members of NICEIC

#153100 - 04/20/06 04:50 AM Re: Old Phone Spark Gap?
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
I'm not familiar with the styles of protectors used in the past (not on U.S. systems anyway), but it looks rather large to me for a phone line spark gap. Protectors for a normal loop were double-pole, although it's possible that this could have been an old-style "earth return" line, especially given the very rural location.

From the general appeareance though, I'd be more inclined to think that this was probably connected to a radio antenna.

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals