Why disconnect the negative

[azeroth123 10+ year member]

It's typically safer to accidently drop the positive lead onto the body of the car while the car is not grounded compared to dropping a positive lead on a car when it is grounded.

True but if the positive lead is disconnected at the battery doesn't that make the neg a moot point?

 

[MyFartsStink 10+ year member]

disconnect which ever one you like, both will break the circuit. But then the postitive terminal is still hot if it comes into contact with metal, thus still shorting out the battery. Disconnect the ground you make the whole battery useless so the current wont go through.

 

[DBfan187 5,000+ posts]

I can disconnect the positive terminal all day and touch bare metal with it and nothing will happen. I've done it several times.

 

[SilverSquared 10+ year member]

bcae1.com. GREAT site. The owner, or one of, is my Amp Mechanic...also make his own brand, which is BAD ***...just his largest is 800w.

 

[dman4486 5,000+ posts]

I can disconnect the positive terminal all day and touch bare metal with it and nothing will happen. I've done it several times.

i think he was trying to say the battery's positive postnot the wire

 

[AC Slater 10+ year member]

i cant believe no one has said the correct answer yet...

 

[dman4486 5,000+ posts]

i cant believe no one has said the correct answer yet...

op's question has been answered....

 

[AC Slater 10+ year member]

sort of... there is still not a correct explantation of why though.

 

[dman4486 5,000+ posts]

sort of... there is still not a correct explantation of why though.

didn't know we were going for why...i just answered in the first place and then haven't read the rest

edit: till now

 

[PsychoTheRapist 5,000+ posts]

From a safety standpoint there is a big difference which wire you remove first. If you take your wrench to the positive terminal and accidentally touch it to a metal part you can accidentally cause a massive short circuit complete with sparks, molten metal flying through the air, and possibly an exploding battery. (assuming a negative ground vehicle)

If you had removed the ground wire first there would be no short circuit if you accidentally touch your wrench to a metal part of the vehicle.

 

[AC Slater 10+ year member]

psycho is on the right track //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

in a DC circuit, power comes from the ground.

 

[DBfan187 5,000+ posts]

psycho is on the right track //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
in a DC circuit, power comes from the ground.

//content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gifI've already said that.

 

[Alpineinstaller 10+ year member]

//content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gifI've already said that.

x2

and the OP is an r-tard for saying his fuse popped when the battery was disconnected.

 

[AC Slater 10+ year member]

//content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gifI've already said that.

you hush, you dont count.

 

[ultimate157 5,000+ posts]

As psycho said, the real reason for disconnecting the negative and not the positive is because if you are disconnecting the positive wire and accidentally ground your wrench or ratchet, you will cause an instant short with a massive conductor. Needless to say welding will occur. This is not recommended.