Positive ground

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Mike's 49 Cub
10+ Years
10+ Years
Cub Star
Cub Star
Posts: 147
Joined: Wed Jul 27, 2005 8:27 pm
Zip Code: 46970
Tractors Owned: 1949 Cub 1940 H
Location: In. Peru

Positive ground

Postby Mike's 49 Cub » Tue Feb 06, 2007 3:07 pm

Thought I better ask before I screw something up. I have positive ground on my battery. When I hook up my charger I disconnect the battery cables then hook charger up as normal.. red - positive and black negative. I really don't understand this "positive" ground stuff. On my garden tractor I leave the battery charger hooked up while I try starting it. If I leave the battery cables hooked up on the Cub and hooked my battery charger to it red/positive and black /negitive am I looking at having some trouble if I try starting it while hooked up and would it be hooked up properly ?? Positive ground-- I don't know !!!!!!!!!!! Help Mr. Wizard !!!!!!
Mike's 49 Cub

Matt Kirsch
10+ Years
10+ Years
501 Club
501 Club
Posts: 4189
Joined: Tue Jun 08, 2004 3:04 pm
Zip Code: 14559
Circle of Safety: Y
Location: Rochester, NY

Postby Matt Kirsch » Tue Feb 06, 2007 3:17 pm

As long as you connect positive to positive and negative to negative, there will be no trouble at all. Polarity is all that is important.

The only difference between positive and negative ground is the direction the electricity flows. Electrical parts don't care whether a wire brings the juice or a huge chunk of cast metal does. All they care about is positive-to-positive, and negative-to-negative.

User avatar
Bus Driver
Team Cub Mentor
Team Cub Mentor
501 Club
501 Club
Posts: 2900
Joined: Sat Feb 11, 2006 5:26 pm
Location: NC

Postby Bus Driver » Tue Feb 06, 2007 3:20 pm

Set the charger for the correct voltage. Connect the red charger clamp to the positive post of the battery ( or the battery terminal on the cable installed on the battery). Connect the black charger clamp to the negative post or terminal. Plug the charger into the premises power outlet. Battery charging with the battery properly connected is not a problem. Unplug the charger from the power source first before removing the clamps from the battery.
Luck favors those who are prepared

User avatar
Bigdog
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 24066
Joined: Sun Feb 02, 2003 12:50 pm
Zip Code: 43113
Circle of Safety: Y
Location: OH, Circleville

Postby Bigdog » Tue Feb 06, 2007 3:36 pm

I think it's important that people understand that neither the pos or neg lead of a battery charger is "ground" It only becomes "grounded" when attached to the battery terminal that is attached to vehicle ground.
Battery chargers are always connected positive to positive and negative to negative.
That being said, I also feel that older standard battery chargers - those without current limiting protection - should be disconnected before an attempt is made to start the vehicle. During the start cycle, a lot of current is demanded by the circuit, if the battery cannot supply it, the charger will try to and if there is no current limit protection the charger can be damaged.
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.

My wife says I don't listen to her. - - - - - - - - Or something like that!

Image

http://www.cubtug.com

User avatar
grumpy
10+ Years
10+ Years
501 Club
501 Club
Posts: 2781
Joined: Tue Jan 10, 2006 12:03 am
Zip Code: 15522
eBay ID: grumpysales
Circle of Safety: Y
Location: PA. Bedford (Centerville)

Postby grumpy » Tue Feb 06, 2007 4:14 pm

Big Dog Thank you. :) :) I have been telling a friend that technically(sp) a battery has no real ground terminal.It's up to you which post you want to be the ground. :lol: :lol: Dave
David Dee Mock-Leonard

Nothing is foolproof to a sufficiently talented fool.

Some days it's not worth chewing through the restraints

CTdave
5+ Years
5+ Years
501 Club
501 Club
Posts: 1194
Joined: Mon Dec 18, 2006 9:14 am
Zip Code: 06870
Location: Greenwich, CT

Postby CTdave » Tue Feb 06, 2007 4:38 pm

So with all this being said, If I were bare foot, standing in a puddle and I touch anything metal on the tractor, I could get a 6 volt tingler? I doubt it would hurt considering the feeling of 110ac pulsing up your arm :shock: but wouldn't I get some sort of charge? What about an impliment in wet ground?

User avatar
Bigdog
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 24066
Joined: Sun Feb 02, 2003 12:50 pm
Zip Code: 43113
Circle of Safety: Y
Location: OH, Circleville

Postby Bigdog » Tue Feb 06, 2007 4:50 pm

Dave - first of all - 6 volts is not enough potential to push a current flow through your body. (which is what would have to happen for you to feel a tingle)
Secondly, the tractor chassis is in no way at a voltage potential with an earth ground. The battery has one terminal attached to the tractor chassis and the other terminal is supplying voltage potential to various circuits which all return back to the battery through the chassis.
Even standing barefoot in wet ground there is no current path through you to anywhere since the tractor chassis is not charged in relation to earth. Standing barefoot in a puddle can be lethal if you touch a live electric (AC power line) circuit since the vast majority of common power sources are connected to an earth ground. (There are some AC power circuits that are isolated from ground but most are not.)
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.

My wife says I don't listen to her. - - - - - - - - Or something like that!

Image

http://www.cubtug.com

CTdave
5+ Years
5+ Years
501 Club
501 Club
Posts: 1194
Joined: Mon Dec 18, 2006 9:14 am
Zip Code: 06870
Location: Greenwich, CT

Postby CTdave » Tue Feb 06, 2007 4:56 pm

The only thing I know about electricity is to stay far away from it :shock: :shock: (yes, there will be electrical questions coming from me soon :?

Jim Becker
Team Cub
Team Cub
501 Club
501 Club
Posts: 12140
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Postby Jim Becker » Tue Feb 06, 2007 5:04 pm

Bigdog wrote:the tractor chassis is in no way at a voltage potential with an earth ground. The battery has one terminal attached to the tractor chassis and the other terminal is supplying voltage potential to various circuits which all return back to the battery through the chassis.
Even standing barefoot in wet ground there is no current path through you to anywhere since the tractor chassis is not charged in relation to earth.

Otherwise you would get a big spark when you use a chain to pull a 6v positive ground tractor with a 12v negative ground truck.

User avatar
Bigdog
Cub Pro
Cub Pro
501 Club
501 Club
Posts: 24066
Joined: Sun Feb 02, 2003 12:50 pm
Zip Code: 43113
Circle of Safety: Y
Location: OH, Circleville

Postby Bigdog » Tue Feb 06, 2007 5:33 pm

Jim Becker wrote:Otherwise you would get a big spark when you use a chain to pull a 6v positive ground tractor with a 12v negative ground truck.


Or vice - versa - like pulling a Stuck Chevy with Donny's Ford??? :D :D :D :D
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.

My wife says I don't listen to her. - - - - - - - - Or something like that!

Image

http://www.cubtug.com

Mike's 49 Cub
10+ Years
10+ Years
Cub Star
Cub Star
Posts: 147
Joined: Wed Jul 27, 2005 8:27 pm
Zip Code: 46970
Tractors Owned: 1949 Cub 1940 H
Location: In. Peru

Postby Mike's 49 Cub » Tue Feb 06, 2007 6:22 pm

I should look into taking a basic electric /electroinic's class somewhere. I also have a meter for testing circuits .,ect..... Really don't know how to use it other than testing an outlet to see if it has power. If I knew how to use it properly I know I would be amazed at how much more I could get done without having to go to someone else and ask . Oh well -- can't do it all .. it's nice to have people to ask who are willing and able to help out. Thank's . Mike
Mike's 49 Cub

Gary Dotson
Team Cub Mentor
Team Cub Mentor
501 Club
501 Club
Posts: 2746
Joined: Thu Aug 03, 2006 6:20 am
Zip Code: 43358
Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D
Circle of Safety: Y
Location: OH West Mansfield

Postby Gary Dotson » Tue Feb 06, 2007 7:19 pm

Big Dog, that was a nice job explaining something many of us older folks just take for granted.

User avatar
Kit Sumner
10+ Years
10+ Years
Cub Star!
Cub Star!
Posts: 242
Joined: Fri Nov 17, 2006 4:56 pm
Zip Code: 06413
Tractors Owned: 1959 Farmall Cub w/ fast hitch
Location: CT, Clinton

Postby Kit Sumner » Tue Feb 06, 2007 7:37 pm

I'm with you, Mike. I have a multimeter that I use for only basic info. as in voltage reading or continuity checks, but basically this instrument could do a lot more in educated hands. I just know I'm going to be asking questions about my Cub's electrical system that I really should be able to determine myself. You've given me a great idea - I'm going to take my multimeter to Cecil's Cub minifest the 17th and get some hands on instruction. :) :) Kit
Any job worth doing
is a job worth doing well.

User avatar
grumpy
10+ Years
10+ Years
501 Club
501 Club
Posts: 2781
Joined: Tue Jan 10, 2006 12:03 am
Zip Code: 15522
eBay ID: grumpysales
Circle of Safety: Y
Location: PA. Bedford (Centerville)

Postby grumpy » Wed Feb 07, 2007 12:33 am

Point well taken from Big Dog However when the tractor is running and someone :oops: is dumb enough to pull a plug wire with their bare hand you WILL feel that "tingle" Don't ask :!: :!: Grump
David Dee Mock-Leonard

Nothing is foolproof to a sufficiently talented fool.

Some days it's not worth chewing through the restraints

User avatar
FCUBMAN
5+ Years
5+ Years
Cub Star!!
Cub Star!!
Posts: 442
Joined: Thu Dec 28, 2006 12:35 am
Zip Code: 00000
Tractors Owned: 2 Cubs
1 Simplicity
1 Craftsman
1 Farmall 130 with loader
1 Tiger
Location: CT, Northern

Postby FCUBMAN » Wed Feb 07, 2007 2:46 am

grumpy wrote:Point well taken from Big Dog However when the tractor is running and someone :oops: is dumb enough to pull a plug wire with their bare hand you WILL feel that "tingle" Don't ask :!: :!: Grump


Well, that is a bit more than six volts :shock: :shock: :shock:
Love your tagline!
Brian
"Remember, I'm pulling for you - we're all in this together!"
Quoted from Red Green of Possum Lodge

When you get older, lack of pep is often mistaken for patience.

(1956 and 1948 Cubs)


Return to “Farmall Cub”

Who is online

Users browsing this forum: Cubfriend, gjpgonzo, ricky racer and 4 guests