The answer depends on the context. In electrical wiring, a black screw is typically connected to the hot wire.
While the question is brief, assuming it pertains to electrical wiring is reasonable and aligns with the provided reference. Here's a more detailed breakdown:
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Electrical Wiring Context:
- In standard US electrical wiring, black wires are generally used for the "hot" or live wire.
- Switches and outlets often have screws used for connecting wires. The screws are frequently color-coded.
- Black or Dark-Colored Screws: These are typically connected to the hot wires (usually black).
- Brass or Gold-Colored Screws: These are generally for the hot wire as well.
- Silver or White-Colored Screws: These are for the neutral wire (usually white).
- Green Screws: These are for the ground wire (usually green or bare copper).
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Why "Typically"?
- While color-coding is standard, it's always essential to use a multimeter to verify the voltage before working with any electrical wires. Color-coding is not always followed correctly, especially in older wiring.
- Incorrect wiring can be dangerous.
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Important Safety Note:
- Electricity can be dangerous. If you're not comfortable working with electrical wiring, consult a qualified electrician.
- Always turn off the power at the circuit breaker before working on any electrical circuits.
- Use appropriate safety equipment, such as insulated gloves and tools.
In conclusion, in the context of electrical wiring, a black screw on an outlet or switch is generally connected to the hot wire, but always verify with a multimeter for safety.
