A good connection becomes very important when there is a lot of amperage.
Such an electrical connection can be "wrench tight" and not be good enough!

Large machinery, main electrical connections, etc. frequently require that
the main connections be torqued with a torque wrench. Not tightening the
connection enough can result in a warm or hot (to the touch) connection
(Don't touch these connections BTW!).

A common connection found in a home which requires using a torque wrench is
a main breaker panel (main connections). The label on the panel door will
sometimes specify ft. lbs. for tightening these connections.


"Walter R." wrote in message
Two weeks ago, my new a/c condenser stopped running. When the technician
checked the condenser, he found that one of the fuses in the disconnect
box had blown. The circuit breakers did not trip.

He said the clips that hold the fuse did not make good contact with the
fuse. Consequently, the fuse contacts got hot and the fuse blew. He
replaced the fuse and it has been working fine ever since.

How can mere heat in the fuse clips blow a 30 amp fuse? This seems to
refute everything I know about electricity (albeit, not much).

--
Walter
www.rationality.net