SLU-70 Lugs

[eugenebrooks]

Originally Posted by sanddrag

I'm worried that in this case all you have done is created a "blob" (for lack of a better term) of solder. A good solder joint is a hot one, and hot solder joints happen quickly. You may have just filled in the gaps without providing any increase in mechanical or electrical integrity.


I have a question, assuming you only screw down the lug, do you get a better connection on more finely stranded wire? Like good welding cable as opposed to the junk battery cable they give us?

If the solder flows through the wire and joint you have a good solder connection. Someone practiced at soldering will know what good solder flow looks like. I would not try to solder the SLU-70 lugs with a 25 watt iron, however.

We use #6 welding cable for our power wiring for its flexibility and high quality rubber insulation. The problem with this cable on the SLU-70 lugs is that the wire is fine enough to work its way through gaps in the clamping mechanism. You can end up with a connection that loosens. Solder the connector after clamping the wire it in order to remove this possibility. I would never use the SLU-70 lugs without soldering them.