I stumbled across some old, cloth covered, rubber insulated NM cable today. It had a stranded ground inside. Can anyone date this, or otherwise comment?
While on the subject of OLD work, has anyone considered using hi-temp insulated sleeving over 60C NM to boost it's temp. rating, thereby allowing installation of fixtures requiring 90C supply conductors?
This has been suggested in a book on old wiring and how to deal with it.
