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From: roy@phri.nyu.edu (Roy Smith)
Newsgroups: sci.electronics
Subject: Re: cows and high tension wires
Message-ID: <1989Dec6.213324.18768@phri.nyu.edu>
Date: 6 Dec 89 21:33:24 GMT
References: <6446@tekgvs.LABS.TEK.COM> <2965@psivax.UUCP> <5605@internal.Apple.COM>
Organization: Public Health Research Institute
Lines: 14

In article <5605@internal.Apple.COM>, ems@Apple.COM (Mike Smith) writes:
> Most big wires today are aluminum

	Actually, most big wires today are a combination of aluminum and
steel, what they call ACSR (Aluminum Conductor Steel Reinforced).  It's a
central strand of steel with 6 (I think) strands of similar guage aluminum
wrapped around it.  The aluminum carries essentially all of the current (a
combination of both skin effect and the higher conductivity) and the steel
provides structural strength.
-- 
Roy Smith, Public Health Research Institute
455 First Avenue, New York, NY 10016
{att,philabs,cmcl2,rutgers,hombre}!phri!roy -or- roy@alanine.phri.nyu.edu
"The connector is the network"