Safer To Lift Battery POS Or NEG First?

[rwidman]

Originally Posted by thinwater

.......... Same current break on both sides. How could it be otherwise? Where are those electrons going? It will arc on either side if there is load..

Exactly. Anyone who doesn't understand this shouldn't be working on electrical systems.

And of course, we turn off the loads before disconnecting the battery connections.

[JD-MDR]

Unfortunatly, most of us don't have a choice,we have to learn from our mistakes

[nigelmercier]

Originally Posted by thinwater

... It will arc on either side if there is load...

As I said in Post #32 ...

You are just as likely to get a spark from either terminal, and an arc is unlikely unless the load is inductive.

There is a big difference between a spark and an arc, this thread seems to use them interchangeably.

[leftbrainstuff]

Cant believe this post is still going strong. Demonstrates how urban myths, opinion and bs have greater momentum than science.

Negative is ground. Connect last and disconnect first.

Sent from my SM-N900T using Cruisers Sailing Forum mobile app

[Symphony]

ha Zombie Thread.

but it seems current answer is: if your Positive post is surrounded by exposed Negative (a metal car body, engine block) then you lift the Negative from the battery first, replace last.

otherwise - it makes no difference.

[Zil]

It is always better to do the disconnects as grounded first off, last on. Then, when it is really important, we are less likely to error. I can't believe there could be any controversy with this subject.