Tractor Talk Discussion Board |
Re: Another OT; Main entrance gate intercom
[ Expand ] [ View Follow Ups ] [ Post Followup ] [ Return to Forum ]
Posted by Mark - IN. on January 04, 2005 at 20:44:43 from (64.12.117.7):
In Reply to: Re: Another OT; Main entrance gate intercom posted by Mark - IN. on January 04, 2005 at 20:21:26:
Many years ago at a army installation in Germany, I ran a pair of wires about two miles from a building to a gate for a ringer so didn't have to post a guard around the clock at the gate to let an occasional guest in. Took the pair of wires and ran them to 110/120VAC. The hot side of the AC ran out to a spring loaded switch at the gate (had a sign saying "press button to be let in") through one of the wires, through the switch, back to the building on the other wire, into a telephone on the tip side (green wire). The neutral (other) side of the 110/120 AC went into the ring side (red lead) of the telephone. When the button was pushed, completed a 110/120 VAC circuit through the bell of the phone, making it ring for as long as someone held the button down. AC is not polarized, so could actually reverse the wires and would do the same thing. The point is that had to send AC out to one side of the "spring loaded momentary" switch on one wire, back to one side of the phone ringer on the other wire from the other side of the switch, and the other side of the AC had to go to the other side of the bell. Press the button, phone (bell) rang, then drove out there in a jeep and opened the gate. You could do that, but make sure that the AC source and cable are properly fused, because lightening just loves shallow cable. If you bury a cable, should be 24 or 22 Ga PIC (gel filled buried drop), should be a foot deep at least, and don't forget where buried it - and probably isn't code for civilians. In the army, we didn't care about code or regulations, we just did what had to be done, and kept our mouths shut.
Follow Ups:
Home
| Forums
Today's Featured Article -
Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
Copyright © 1997-2024 Yesterday's Tractor Co. All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|