I have to change an electric outlet, does it matter what side the black and white wires are on? Are the wires supposed to be connected specifically to one side or can I just connect either wire to either side?
The white wire is neutral, the black wire is “hot”, or live. A green wire is an earth ground wire, which provide a path back to the source of the electrical current (the main electrical panel) in case of a fault, which should trip the breaker. Both white and black wires carry the current.
It is good practice to make note of which wire is on which side when replacing. If replacing a receptacle, the white wire goes on the silver screw. The bare copper or green wire goes on the green grounding screw, and the black wire gets attached to the brass screw. If the terminals aren’t easy to identify by color, the ground terminal might be marked with a “GR.”, the white wire goes to the side with the longer slot, the black wire always goes to the short slotted side.
Before working on anything electrical turn off the circuit breaker that controls the outlet and test that the power is off with a circuit tester.
Black is hot and white is common. Guage must match what is there already and it does matter the position for each. And always cut the break before you begin.