Article View: mod.telecom
Article #734Re: color code for wire?
From: denber.wbst
Date: Wed, 11 Mar 1987 17:40
Date: Wed, 11 Mar 1987 17:40
20 lines
1495 bytes
1495 bytes
"is the line polarized or does it just act like two wires with A/C electricity" Yes, the phone line is polarized, and no it *usually* doesn't matter which way your phone is hooked up. I've heard some older model touch-tone phones won't dial if they're connected backwards. Ordinarily, the colors should match - red to red, green to green. One is at ground and the other is something like -48 vdc (I forget which is which). By the way, AC lines are polarized too. The white wire is always ground (technically "neutral") and the black wire is hot. Black always runs to the smaller slot of electrical outlets, (the coppper colored screw terminal). Never trust this of course - you'd be surprised how many houses have wiring errors. Unlike phones, the penalty for a mistake here can be death. You can buy cheap polarity testers for both phone outlets and AC outlets from Sears or Radio Schlock. - Michel
Technical Details
Message-ID:
<870311-095931-1652@Xerox>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!water!watnot!watmath!clyde!cbatt!ucbvax!XEROX.COM!denber.wbstShow Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watnot!watmath!clyde!cbatt!ucbvax!XEROX.COM!denber.wbst From: denber.wbst@XEROX.COM.UUCP Newsgroups: mod.telecom Subject: Re: color code for wire? Message-ID: <870311-095931-1652@Xerox> Date: Wed, 11-Mar-87 12:40:00 EST Article-I.D.: Xerox.870311-095931-1652 Posted: Wed Mar 11 12:40:00 1987 Date-Received: Sat, 14-Mar-87 11:40:39 EST Sender: daemon@ucbvax.BERKELEY.EDU Distribution: world Organization: The ARPA Internet Lines: 20 Approved: telecom@xx.lcs.mit.edu