Posted by Dave H (MI) on January 26, 2020 at 13:34:54 from (50.108.77.197):
I have an old house that I want to put a direct wired, in wall timer in for the outdoor lights. This would replace the old on/off switch that is in there now and allow me to have outdoor lights come on and off when I am not around. The wiring is a good 80 years old in the switch box and consists of two wires with heavy black insulation on them hooked to either side of a very old switch. Most all the timer switches I look at say they require a neutral wire. This puzzles me a little because I kinda assumed that all 110v AC systems had at a minimum a hot (black) and a neutral (white) wire, but then I have avoided working on the 80+ year old wiring in the past and have stuck with the modern stuff. My question is...do I have a neutral wire and how do I tell which one is the neutral wire?
I can tell you what I was thinking of trying. I was going to plug an extension cord with three wires into a known grounded outlet in the newer part of the house and run it into the old part of the house. Then I was going to use my VOM meter to check the two wires in the wall box using one lead to the box and the other to the ground on the extension cord. I was thinking the hot wire would read voltage and the neutral would not...or is that wrong headed?
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