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Article #734

Re: color code for wire?

#734
From: denber.wbst
Date: Wed, 11 Mar 1987 17:40
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	"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
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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
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Posted: Wed Mar 11 12:40:00 1987
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