If the home was wired properly the black or red wire are hot the white is neutral and the green is ALWAYS the ground
The National Electrical Code requires that the neutral wire is to be designated as the "identified" conductor. Method differ, but look for ridges, lines, or writing on one of the wires.
In household wiring the black or red is active, live, or hot.
By "clear insulation," I assume you mean the type of wire used in some lamp cords. If so, the hot wire is the one with the smooth (non-ribbed) insulation.
The hot wire on a lamp cord will be the the side that has the more narrow prong on the plug-in. Or you can look at the cord and whichever side is smooth, (not ribbed but smooth), is your hot wire.
The black wire is the hot wire through which the electrical current flows to the appliance. The left over voltage which is usually zero flows back to the main circuit panel through the white neutral wire where it flows to ground.
You hooked the ground wire to you amp to a hot wire. The hot wire is black and it's the hot wire to the cigarette lighter. I used to be a Ford mechanic and saw this alot and charged people lots of money to fix their Stupid mistake.
The electrical terminology of a wire with no insulation on it is a bare wire.
the hot wire carries the electrical voltage
If a "hot" wire contacts the "neutral" or ground wire, electrical current flows to the ground.
The National Electrical Code requires that the neutral wire is to be designated as the "identified" conductor. Method differ, but look for ridges, lines, or writing on one of the wires.
In household wiring the black or red is active, live, or hot.
One can purchase a hot wire cutter through various stores that sell electrical appliances. There are equally some online stores that sell hot wire cutter like, amazon.
By "clear insulation," I assume you mean the type of wire used in some lamp cords. If so, the hot wire is the one with the smooth (non-ribbed) insulation.
Your 2-wire system is actually connected to one "side" of the 3-wire system. In your utility's 3-wire system you have 2 hot wires that are attached to each end of a tranformer winding and the neutral is attached in the middle and grounded. Typically in the US this gives you 240v (or something similar) between hot leads and 120v from each hot lead to neutral or ground.
The hot wire on a lamp cord will be the the side that has the more narrow prong on the plug-in. Or you can look at the cord and whichever side is smooth, (not ribbed but smooth), is your hot wire.
The "hot" wire between these two coloured wires will be the blue one. The green colour is always used as ground in electrical circuits.
What do you mean by hot water system? If you mean hot water tank than a three wire hot water tank means that its 220 volt electric. If you have to ask than don't touch it