[AT] Tractor batteries

[charlie hill]

Am I imagining this or wasn't there a problem back in the day
when someone with a 12V neg ground car touched bumpers with
a 6V positive (or any positive) ground car?  Metal bumpers.  I seem
to remember it was something that had to be taken into consideration.

Charlie

-----Original Message----- 
From: Spencer Yost
Sent: Friday, January 17, 2014 3:13 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Tractor batteries

I always thought it was coincidental:   The adoption of 12V happened roughly 
the same time negative ground was being adopted; so many manufacturers did 
both at the same time.

Like Steve, I heard corrosion of ground points was the reason for the 
grounding switch but I have no idea if that is correct.

Spencer

Sent from my iPhone

> On Jan 17, 2014, at 0:06, Greg Hass <ghass at m3isp.com> wrote:
>
> Was looking at some old tractor stuff online and was reminded of
> something I  have know for years but have never, at least in my failing
> memory, seen a plausible explanation as to why most 6 volt tractors have
> positive grounds whereas 12 volt tractors have negative ground.  At
> first I thought it could be because 6 volts had generators, however, our
> first 12 volt tractors had generators and later models had alternators
> so that doesn't seem to be the reason. Any and all answers would be great.
>      Greg Hass
> _______________________________________________
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