Dan wrote:

You can also get self vulcanizing tape specifically made for high
voltage splices. Get it at an electrical store, no HD or Lowes.
then wrap that with lots of electrical tape.

This stuff

" Scotch® 23 Rubber Splicing Tape is a highly conformable, self-fusing
Ethylene Propylene Rubber (EPR) based high-insulating voltage tape.
Scotch® 23 has a "snakeskin" liner that is easily removed as the tape
is applied. "

Nice stuff, but 208V isn't remotely close to "high voltage", and indeed
I expect it's 120/208 Y service so it is only 120V to ground. Heck,
120/208V is less then the normal 120/240V in residences. Regular quality
electrical tape like 3M's Super 33+ is quite sufficient.