Ron,
When working on your automotive battery, you must do the procedure I gave
Tom earlier which is again entered below. You MUST remove the negative
connection first.
Here is what I sent earlier:
Hi Tom,
I know the question has already been answered, however, according to the
repair manuals my son and I have used while repairing our vehicles, always
instructs us to remove the ground first and to reconnect it last. While the
manual does not say why, the logical reason is as follows: With the cramped
quarters in vehicles today, it would be fairly easy to have your wrench
touch some metal part in the vicinity of the battery. If you remove the
negative side of the battery, all the potential points of contact by your
wrench are no longer ground in relation to the negative side of the battery
thus no possibility of a short because the negative side is not connected to
anything. Does this make sense?
Howard #3
WA9YBW
----- Original Message -----
From: "Ron Miller" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, October 25, 2014 3:03 PM
Subject: Re: Best procedure for connecting and disconnecting a 12-volt
battery
> are right. You want to disconnect the positive terminal first, then
> ground.
> When re-connecting, always connect the ground first. This is so that the
> current always has a safe path to ground, not through you, or through
> other
> equipment.
>
> 73,
>
>
>
>
> Ron Miller
> N6MSA
> Tarpon Springs, FL
> -----Original Message-----
> From: Ed Malmgren
> Sent: Friday, October 24, 2014 4:52 PM
> To: [log in to unmask]
> Subject: Fw: Best procedure for connecting and disconnecting a 12-volt
> battery
>
> Tom, your right this time but don't tell your Y L that I said she is
> wrong.
>
>
> Oh well I don't have to live with her hi hi 73
> ED K7UC
> -----Original Message-----
> From: Tom Behler
> Sent: Friday, October 24, 2014 2:37 PM
> To: [log in to unmask]
> Subject: Best procedure for connecting and disconnecting a 12-volt battery
>
> Hi, all.
>
>
>
> I am sure that, to some, this question might seem to be very elementary,
> especially for someone like me who holds an Extra class license. So,
> please
> bare with me, and understand why I am asking the question. As a college
> professor, I always try to teach my students not to simply memorize
> procedures or concepts just for the sake of doing so. I tell them that
> real
> learning involves understanding the procedures and/or concepts and the
> reasons behind them. I also stress that true learning involves being able
> to apply what you have learned to real life situations.
>
>
>
> Anyway, here's my question:
>
>
>
> Earlier this afternoon, my XYL and I were in the process of getting our
> summer camping trailer winterized for the season, and taken to a local
> facility for winter storage. As we worked, it came time to disconnect the
> house battery from the unit, so that it can be put on a trickle charger
> during the winter months.
>
>
>
> Before we disconnected the battery, we were discussing the best and/or
> safest procedure for doing so. We never worried about this with the
> drivable RV we used to have, because it was always kept in our driveway
> and
> plugged into our main house power all winter.
>
>
>
> Anyway, my proposed approach was this:
>
>
>
> When disconnecting the battery, disconnect the positive side first, and
> then
> the negative. The idea here is that you always have the negative or
> ground
> connected when you're working with the battery.
>
>
>
> When re-connecting the battery, I proposed connecting the ground terminal
> first, once again, to give you a ground to start from, and then connect
> the
> positive terminal last.
>
>
>
> My XYL's approach was the opposite:
>
>
>
> She argued that when disconnecting the battery, disconnect the negative
> terminal first, and then the positive. . When connecting, connect the
> positive first, and then the negative.
>
>
>
> As a smart person who has much faith in my XYL's judgment, I decided to go
> along with her proposed approach, and happily, we are both still here to
> talk about it.
>
>
>
> However, I know that I have connected and disconnected many a battery
> using
> my initial approach, and I've survived that as well. Perhaps I just got
> lucky, but I always thought I was proceeding with care, and with the
> correct
> procedure.
>
>
>
> Once again, I hope nobody minds this question, but I consider everyone
> here
> to be knowledgeable on many things, and I trust that you will all be able
> to
> go with the idea that the only stupid question is a question that goes
> un-asked.
>
>
>
> Your wisdom on the topic would be most appreciated.
>
>
>
> Thanks for listening.
>
>
>
> Tom Behler: KB8TYJ
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