Greetings- I have a 1930's home that I'm sure has been updated over the years, but I'm trying to figure out this wiring. When I pull a light switch out of the wall, in some cases I see only two wires and in some, 3- which is for 3-way switches. My question is- how do I determine hot from neutral and in the case with 3-way, hot from "traveler" as both/all are wrapped in the same colored, cloth sheath? This of course is the same throughout the house with ceiling fixtures, electrical outlets, etc. Everything is in a cloth sheath with no inidicator of hot and neutral.