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that is a bit overkill for a connection which is about 2.5-3 nm at most.View attachment 25683
This is a genuine pic of an Electrician using his impact driver to do up board terminals, he wasn't the only bloke from this firm, they were all doing it. .
When I saw him I said wtf and he said its for the speed and torque as it's a requirement in the regs
I showed him a proper torque driver he wasn't impressed!
i use a 10.8v bosch drill driver for doing boards have done for years.
torque set to 4 is about right and 5 for the main terminals.
still go over it with normal driver though