Tightening Terminals on CU's

[JohnD]

I still think it often happens because the soft copper deforms under pressure, so even if it was tigh when you started, it needs doing again a few days, and a few weeks, later

 

[333rocky333]

But why do so many equipment manufacturers insist on using these horrible screws anyway?

Maybe the machines that assemble the things, work better and faster using them.

 

[mfarrow]

But why do so many equipment manufacturers insist on using these horrible screws anyway?

Only for your convenience.

If they wanted to increase assembly output, they'd replace them all with torx screws: No camming out, and only 60 degrees maximum rotation before driver engagement. When you are inserting millions of screws in thousands of assemblies, the extra fractions of seconds required to rotate the tool soon add up.