Hand-tighten your cable connectors with a 7/16-inch wrench. Make sure they are as tight as possible.
A ladder may be required to reach some electrical cables. Enlist an assistant to help steady the ladder while you work.
If possible, wait until late spring or summer to seal your electrical cables. Silicone sealant dries and hardens best on fair, temperate days.
Never work with electrical wiring or cable without ensuring that the power connection has been cut.
Working on rooftops or up on ladders can be dangerous. Have a helper as a safety precaution.