white wire = neutral
bare wire = ground
black wire = line voltage
red wire = returned from a switch, or the other phase of line voltage in order to supply 240VAC
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The white wire is typically neutral, the black wire is usually hot or live, the red wire may be a secondary live wire or used for a separate function, and the bare wire is typically the ground wire for safety purposes in an electrical circuit.
The green or bare wire is typically the ground wire for a dryer plug. If your wires are black, white, and red, the white wire is usually neutral, the black is hot, and the red is also hot. You should double check with a voltage tester to be certain.
Connect the white wire from the European oven to the white wire in the US receptacle. Connect the black wire from the European oven to the black wire in the US receptacle. Connect the green wire from the European oven to the bare wire in the US receptacle. The green wire serves as the ground wire since you don't have a separate ground wire in the US receptacle.
Typically, in the US, the blue wire of a ceiling fan is for the light kit, the red wire is for the fan motor's high speed, the green wire is for the ground, and the white wire is for the neutral connection. You would connect the blue wire to the black wire of the ceiling, the red wire to the red wire of the ceiling (if there is one), the green wire to the bare copper wire (ground), and the white wire to the white wire.
In a typical dryer plug, the two hot wires are usually the red and black wires. The white wire is typically the neutral wire and the green or bare wire is the ground wire. Always consult the manufacturer's instructions to be sure.
To connect a timer to a white and black house wire with red, black, and white wires, typically the black wire from the timer connects to the black house wire, the white wire from the timer connects to the white house wire, and the red wire from the timer connects to the red wire from the house. It's important to follow the manufacturer's instructions and turn off the power before installation.