"lp13-30" wrote in message
...
FWIW, my parents house (built in 1957, we bought it in 1961) has
soldered connections wrapped with the old friction tape they used back
then, and haven't had the least problem with any of them. Larry

It's been a LONG time but my understanding was when solder was used to join
power wiring, a RUBBER tape was put over all the bare copper to insulate.
The rubber tape used didn't stick all that well. "Friction" tape (cloth
with "tar") was put on top of the rubber to hold it in place and to protect
it from FRICTION.

The idea was to duplicate the way the original wiring as insulated which was
rubber next to the conductor and cloth to protect the rubber.