Why allways the negative battery post ?

[luigi164]

While working on the electrical system of a vehicle, it's allways recommended to disconnect the negative battery-terminal to prevent damages, sparks etc...
Imho you can also disconnect the positive terminal......or not??

What's the difference ? or is there a reason for that?

Luigi

 

[The Horvaths]

While working on the electrical system of a vehicle, it's allways recommended to disconnect the negative battery-terminal to prevent damages, sparks etc...
Imho you can also disconnect the positive terminal......or not??

What's the difference ? or is there a reason for that?

Luigi

You never want the battery to be grounded while working on it.

 

[300rag]

While working on the electrical system of a vehicle, it's allways recommended to disconnect the negative battery-terminal to prevent damages, sparks etc...
Imho you can also disconnect the positive terminal......or not??

What's the difference ? or is there a reason for that?

Luigi

You can disconnect either, but when disconnecting the negative you don't run the risk of shorting the post to ground and having a spark show with your wrench, which is a possibility if doing the positive terminal first.

 

[saylor]

all that ^^ above

plus (I dunno if this is total BS or not) I heard it puts less *blam* on all the electronics.. meaning you are connecting the 'out' path and not the 'in' path...

have no idea if that is true or not.

 

[Big_John]

all that ^^ above

plus (I dunno if this is total BS or not) I heard it puts less *blam* on all the electronics.. meaning you are connecting the 'out' path and not the 'in' path...

have no idea if that is true or not.

If you are talking the direction of electricity... electrons flow from negative to positive.

 

[cantflip]

If you are talking the direction of electricity... electrons flow from negative to positive.

Oh Please, Big John, don't hit this board with electron theory... too many struggle with conventional theory as it is...

see a pokey stick... I'm amusing myself Not lashing out...

 

[Slantsix]

Electricity is blue and hurts....

 

[commando1]

Electricity runs down hill...

 

[cantflip]

Electricity runs down hill...

 

[Gerald Morris]

Oh Please, Big John, don't hit this board with electron theory... too many struggle with conventional theory as it is...

see a pokey stick... I'm amusing myself Not lashing out...

OH! let's not forget HOLE Theory, which is how electronicists usually prefer to trace out current flow, from + to -. Electron theory is for electricians and power engineers, who sometimes need to account for the actual presence of particles so small that they may not actually exist any more than a photon does. Are they a "wave" or a particle? Treat current as negative to positive, and you can then dig WHY a negative ground needs to be disconnected; its all over the body!

 

[Gerald Morris]

Electricity runs down hill...

NO! It's RED and runs UPhill!

 

[67Monaco]

When you see a battery explode in someone's face because of a dead short from positive terminal to chassis, you will forever disconnect the negative terminal first. Even when I jump start a car or connect a charger, ground is last on, first off.