The hot screw on a Porcelain socket or and electrical is the Gold screw. The Silver screw is the neutral
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.
In a household circuit, with a "hot" conductor insulated black and a white neutral, the black wire should connect to the center terminal of the socket. The outside part of the socket usually has a brass screw (for the black wire) and a nickel screw (for the white wire).
I do not know what you mean by long slot. The bare ground copper wire connects to the green screw or the ground screw. The black wire attaches to the copper or gold colored screw and the white wire connects to the silver or chrome screw. Both the gold and silver screws are on the side of the outlet. The ground screw will be on one end of the outlet.
If there are three attachment points then you have a ground and two hots. The ground goes to the green screw and the hot wires can be connected to either hot screw. If there are four wires then the hots will likely be red and black. The white wire is the common or neutral and the green or bare wire is ground.
On a 110 volt circuit, Black is hot, White is neutral, Green or bare Copper is ground. . Connect Black to the gold screw, White to the silver screw, and bare copper ground to the Green ground screw on the receptacle. On a 220 Volt circuit Black & Red are both hot, each carrying 110 volts for a total of 220. White is Neutral and ground is Green or bare copper.
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.
In a household circuit, with a "hot" conductor insulated black and a white neutral, the black wire should connect to the center terminal of the socket. The outside part of the socket usually has a brass screw (for the black wire) and a nickel screw (for the white wire).
Heated hot enough, which is very hot, porcelain decomposes. It is possible that the materials it forms could melt, I don't know.
I do not know what you mean by long slot. The bare ground copper wire connects to the green screw or the ground screw. The black wire attaches to the copper or gold colored screw and the white wire connects to the silver or chrome screw. Both the gold and silver screws are on the side of the outlet. The ground screw will be on one end of the outlet.
If there are three attachment points then you have a ground and two hots. The ground goes to the green screw and the hot wires can be connected to either hot screw. If there are four wires then the hots will likely be red and black. The white wire is the common or neutral and the green or bare wire is ground.
If you are referring to a "socket" as a receptacle there is a device that can be purchased at a hardware store that just plugs in and with lights it tell you if the wiring is correct. All switches should be wired with the hot wire at the top. On a wall switch hot wire to the top screw.
clay heated in a kiln really hot
In comparable crockery, a porcelain piece would be lighter than a piece of stoneware. This is because porcelain items are usually made thinner than stoneware.
HERE'S AN EXAMPLE: IF THE POLARITY IS BACKWARDS AT A LIGHT FIXTURE THEN THE HOT (120VOLTS) WILL BE THE OUTSIDE OF THE LIGHT BULB SCREW SHELL AND THE MIDDLE PRONG INSIDE THE SOCKET WILL BE THE NEUTRAL -- THEREFORE WHEN YOU CHANGE THE BURNT OUT LIGHT BULB YOU WILL GET SHOCKED BECAUSE THE SCREW SHELL PART IS HOT!! IF WIRED CORRECTLY YOU WILL NOT GET SHOCKED BECAUSE THE HOT (120VOLTS) WILL BE INSIDE THE SCREW SHELL ON THE PRONG AND YOU WON'T BE TOUCHING THAT PART WHEN YOU CHANGE THE LIGHT BULB!!
One wire is the hot off the plug, one is the hot to one socket, and the third wire is the hot for the second socket. You'll have to check the switch for the exact color code / which wire is which (I don't know if there is a standard). You can test it easily with a multimeter as well.
The brass screw is for the hot connection, usually the black wire.; sometimes a red one. The silver colored screw is for the white wire or neutral. If there is a green screw, it's for the ground, usually a bare wire but may also be green.
On an Edison screw (ES or SES) it is in the bottom of the socket not the sides where the lamp screws in that is the neutral connection. On a bayonet catch (BC or SBC) it is either of the two pins, the other being neutral.