N_Cook wrote:

To avoid condensation creeping, via capillary action, between copper
conductor and the sleeving from an open end into otherwise sealed section.
How to make or what sort of term or construction to look for in cable specs?


The only wire that meets your requirement is intended for direct
burial, and is called 'Flooded cable' Nasty stuff to work with. It is
made for CATV, Networking and TELCO applications. Stock up on good
industrial hand cleaner and a bale of paper towels if you decide to use
it.


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