There’s not a more sure sign that a non-electrician has been in there than electrical tape on wire nuts. Properly installed, there is absolutely no need for tape. No taping around the device either. All both really accomplish is insuring a nice nasty, gooey residue left for someone down the road.
That is a great tip and I have saved it. One question?? Do you just shove the wires in or do you twist them first?
I do not pre-twist. Although some electricians will swear that it’s an absolute must, every box of wire nuts where I’ve ever taken the time to read the directions will state that you just twist them on. Most will add something like “pre-twisting is acceptable, but not required”. In fact, I’m holding a box of Buchanan B-Cap red wire nuts in my hand, and it says just that.
Almost every poor wire nut connection that I’ve ever had to remedy has been due to someone, without the skill, pre-twisting solid conductors. Especially if more than 2 solid conductors.