i recently purchased a home and noticed weak air-flow thoughout the house. When i pulled the cover off from infront of the inside condenser, i thought for a moment that the previous owner had installed filters on the underside of the coils. That was not the case however, for upon further inspection and a little prying i removed a 1/4 inch mat of dirt/hair/funk spaning the entire underside of the coils.
While giving the coils some much needed attention i noticed a red lead comming from the blower motor which was just dangling down the side near the coils that had the end (metal push-on clip) electric-taped. I had the trusty ol' volt meter on-hand so i desided to see if this wire which was dangling so close (for who knows how long) to the squirl-fan was hot. I proceded to hook the wire with the end of my probe (mid-way up the wire on clean insulation) to get a better vantage on the end clip and my volt meter registered 120 volts. Mind you, this is just touching the outer insulation of the wire. For s&g's I tried the insulation on the remaining 3 wires comming from the motor and they registered 15-20 volts on the insulation.
Now. Im not an electrician and most of my electronic know-how is focused on computers where 12 volt DC is about the worst burn im gonna get, but shouldnt the wire insulation be, insulating the current? And why is this red lead comming from the motor (yellow blue green are tied in with the relays above the blower) hot with 120v? Is this just the norm? Should i roll up the red lead and insulate it from grounding out?