Date:         Thu, 15 Jun 2000 19:24:32 -0400
Reply-To:     David Beierl <dbeierl@ibm.net>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ibm.net>
Subject:      Re: 2nd batt. charging and relays. The whole truth
Comments: To: MVAone@aol.com
In-Reply-To:  <b8.71e9794.267aace8@aol.com>
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At 18:04 6/15/2000, Mark Watts wrote:
>V=IR Let's see someone measure the resistance of the Hella wire.

Ohms per *five* feet, annealed electrical-grade copper, American Wire Gauge:
18 ga -- .032
16 ga -- .020
14 ga -- .013
12 ga -- .008
10 ga -- .005
  8 ga -- .003
  6 ga -- .002
  4 ga -- .0012

Amps per 100 millivolts across those same five feet:
18 ga -- 3.1
16 ga -- 5.0
14 ga -- 7.9
12 ga -- 12.6
10 ga -- 20.0
  8 ga -- 31.8
  6 ga -- 50.6
  4 ga -- 80.5

>Betcha it's around 1 ohm. Hope this is right

Factor of ten would make you a scientist.  Factor of two would make you an
engineer.  Factor of 50 or more makes you wrong, usually... <g>  33 AWG
wire (.007 in, 0.18 mm diameter) would be about one ohm for five feet.  The
fuse will have more resistance than the whole rest of the wire, quite likely.

:)
david


David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"