I love this stuff for anywhere I think may be more prone to corrosion. It can be used on copper or aluminum. I also use it on my vehicles. Trailer connections, plow connections, anything really. I haven't bothered with that gray crap in years. This also makes for a lot cleaner installation.I don't use the NEMA 5-15R Indsutrial spec grade receptacles anymore for flip box receptacles. Like UG said, twistlock are better, but Sunsystem seems to be the norm. I see Greenair has a 10 ballast flip box LFT-10. A customer attached their own lampcords to terminal strips on the exterior of the enclosure. I wonder if the exposure to heat and humidity might make the bare wires under the screws to oxidize over time.