Well, today I decided to disconnect a hot-wired flourescent shop light
fixture and install a three-prong outlet in that box so I could plug
in two new shop lights. Once I got into the box, I realized I
couldn't tell which of the two wires is the hot (black) since this
wire is not grounded and not neatly color coded black/white. If I
touch one end of the neon tester to one wire and the other to the
metal junction box and it lights up, but the other wire under the same
procedure does not, am I right to think that the wire that lights up
is the hot/black?
If in doubt, chech the ballest label, but if it was working fine hard wired
to 120V it should be fine plugged in to 120V
And yes the wire that lights the neon light when the light is connected to
ground is the hot (black) wire. Be very careful w/ live circuits though!
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