Our trade seems to have more than the average number of 'built in contradictions.'
Di-electric grease is quite often used to connect wires; just look inside any of those 'direct burial' wire nuts! For you motor-heads, it's also used on automotive ignition and battery connections.
As for mechanical threads on connectors and such ... the old 'trick of the trade' was to use anti-seize compound. These days, Noalox (and it's competitors) are actually listed for that use in addition for it's primary uses.
One advantage to using Noalox, or anti-seize compounds, is that they will NOT lead to you over-torquing the connection. (That was one of the criteria in their development).
