Yeah, lightly grease them before insertion <chuckle>.
It is a good idea though. All grease is dielectric unless it contains something that conducts electricity. In fact, all pure petroleum products are excellent dielectrics unless they contain some other, conducting compounds. Silicone grease is usually used on electrical components but I often use a light coating of wheel bearing grease or chassis grease as long as it is light in color (so it does NOT contain any graphite or moly lube, etc.). Brake grease (caliper grease) is also fine for electrical use.
There is often a nearly perfect product for every job but if you had them all at hand, the garage would be full of lubricants, solvents, cleaners, etc. It is usually easier to find something that will work for a large range of jobs even if that job is not mentioned directly on the label.
Brian
can this be done? can i use Lithium grease or does it have to be dialetric grease? whats the difference?