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Re: [Healeys] Question re positive ground

To: healeys@autox.team.net
Subject: Re: [Healeys] Question re positive ground
From: Oudesluys <coudesluijs@chello.nl>
Date: Sat, 08 Dec 2012 18:12:47 +0100
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <20121208113334.AKNT6.43750.root@pamxwww11-z01> <005201cdd566$6195f350$24c1d9f0$@net>
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Thunderbird/17.0
A 1A fuse would be far to heavy for a modern printed circuit, 0.2A would 
be more appropriate.
Kees Oudesluijs
NL


Op 8-12-2012 18:06, Mike Garvey schreef:
> You need to very carefully make sure that the GPS unit receives the expected
> polarity and you need to wire the 12V socket accordingly.
> The positive voltage needs to be on the center (deep) contact of the socket,
> otherwise you'll likely fry the GPS unit.  You need to also be careful that
> the outside barrel of the socket (now connected to negative power) cannot
> contact any parts of the car (positive ground) chassis.
> To be safe, I'd put a fuse (1 amp is plenty) in both legs (positive ground
> and negative power) of the lines that supply the socket.
> Mike
>
> Michael Garvey
> 1967 BJ8/38046
> Swampscott, MA
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