Proper torque specs and cleaning busbar and lug connections

**Bala** · 11-13-2023, 03:38 AM

Without knowing the grade of stainless one listing I found was for 20nm dry. I was just doing some 8mm bolts so did some tests and would say 25nm maximum.

Anything that removes oily residue and drys well to clean. Metho, acetone, contact cleaner, brake clean.

**littleharbor2** · 11-13-2023, 10:42 AM

Originally posted by Papote

I have 4 stud M8 (5/16”) Bus bars which connects 4/0 and 3/0 copper lugs from the LiFePo4 batteries (2 5KwH) and Inverters 2 6 Kw split phase off-grid).
I wanted to know what can I use to clean the contact area with properly. Is 99% isopropyl alcohol sufficient?

Also, what should be the torque spec for the 4/0 and 3/0 lugs using an M8 nut.

Like the bus bar. Could you post a link as to where you got it?

**azdave** · 11-13-2023, 10:53 AM

Found these on Amazon.

Amazon.com

https://www.amazon.com/Jamgoer-Distribution-Terminal-Battery-Automotive/dp/B092Q3JBKD?th=1

**littleharbor2** · 11-13-2023, 03:59 PM

Originally posted by azdave

Found these on Amazon.
https://www.amazon.com/Jamgoer-Distr...092Q3JBKD?th=1

Thanks Dave. Couldn't tell from the picture but I thought the right side was a cover for a T- class fuse. Now I see it is just the bus bar cover.

**Papote** · 11-14-2023, 06:36 AM

Got them from Amazon months ago here.
the cover is off to the side just to show the busbar.

Proper torque specs and cleaning busbar and lug connections

Proper torque specs and cleaning busbar and lug connections

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