The wire that is hot on a lamp cord is typically the one that is black or red in color.
The wire on a lamp cord that is known as the hot wire is typically the black wire.
In North America the neutral has to be identified as such. On a lamp cord the ribbed insulation side is the identification of the neutral wire. The "hot" conductor of the lamp cord is the smooth insulation.No. Screw material is no safe indicator because they would be too easy to swap round.
The wire that is hot on an extension cord is typically the black wire.
The type of wire you are looking for is called lamp cord. It comes in different colours usually to match the fixture. Fixtures hanging from chains use a clear insulation so as to blend in with the fixture chain colour. Remember that the smooth wire of the lamp cord connects to the hot wire and the ribbed wire on the lamp cord connects to the neutral wire in the ceiling junction box.
The hot wire's cover is smooth and connected to what I call the "button" at the bottom of the socket. The neutral wire's cover has ridges and is connected to the screw shell of the socket.
If you are referring to lamp cord type wire where both wires are brown then yes, connect the wire with the groves to the white neutral and the smooth wire to the black hot wire.
If you are asking about the electrical cord on a lamp, the black wire with the white stripe is the neutral conductor.
The lamp wire is hot because electrical current flowing through it encounters resistance, which causes the wire to heat up.
Ribbed wire typically refers to a type of reinforcement wire used in concrete construction and is not typically hot. However, if an electrical current is passing through the wire or it is being used in a high-temperature environment, then it could become hot.
When checking for electrical connections, the wire that is hot is typically the black wire.
Are you saying that you plug in a lamp and another lamp on that extension cord goes dimmer? If so then the extension cord wire is of a smll guage size and causing a voltage drop from the outlet to the cord output.
Lamp cord is #18 in size and is rated for 10 amps. This type of wire is strictly for use on lamps only and not to be used for power wiring.