my brother is trying to wire a new 3 way switch into our GE whole house fan. The old switch was only a 2 speed, hi/off, and was not the proper swtich. It quit working yesterday so he went to the hardware store and bought a new 3 way switch, off/low/hi. The new switch has 1 red wire, a blue wire and a black wire. Coming out of the fan motor is a red, black and white. He can get the fan to go to low/hi but not turn off. He does not know what to do with the "extra" blue wire since there was not a blue wire on the old switch. There wasn't any wiring color codes on the package with the new switch, naturally! so he doesn't want to blow something up or start a fire! He now has the 1 black wire from the fan motor and the one black wire from the pull switch, wired to the black conduit wire from the house. The red wire from the switch and the red wire from the fan motor wired together. The white wire coming for the fan motor, is wired to the white wire coming from the house. It tried wiring the blue wire to the white house wire, but that didn't work. As it stands now, you can pull the chain and the fan will go from low to high, but won't turn off, help!

I'm changing a ceiling mounted light, and the new one has a message saying: "Min 90 degree C supply conductors. Most dwellings built before 1985 have supply wire rated 60 degrees, ensure correct branch circuit conductor." My house was built in 1935 and still has some knob and tube, but the old ceiling light was installed within the last 10 years. How can I verify that it is safe to install the new one?