I am redoing some wiring in our house that involves breaking and remaking some original connections -- ripping out and replacing boxes by larger (e.g., two-gang by three-gang). I find that in some cases all the conductors of the same color have been connected using crimps that have then been taped over -- even the hots. Is this kosher? Surely wirenuts provide better insulation than the tape. There could be 220/240 volts between conductors in some boxes because there are Edison circuits involved.
Should I use wirenuts for the reconnections? Crimps and tape take up less room.
And, while I think of it, is it OK to have circuits fed from different breakers in the same box (e.g., outlet and light switch)? One could assume that since the one circuit is dead (switched off at the panel), the other is too.
Perce