In older electrical wiring systems, red is the live wire.
Here's a breakdown:
Electrical wiring color codes are used to identify the purpose of each wire within an electrical circuit. The "live" wire, also known as the "hot" wire, carries the electrical current from the power source to the electrical device. It is crucial to correctly identify the live wire to avoid electrical shock or damage.
Understanding Wire Colors
Historically, different wiring standards existed. However, modern standards aim for uniformity.
| Wire Function | Old Wiring System Color | New Wiring System Color |
|---|---|---|
| Live | Red | Brown |
| Neutral | Black | Blue |
| Earth (Ground) | Green and Yellow (or Bare) | Green and Yellow |
Important Considerations:
- Older Homes: In older homes, you are likely to encounter the red/black color scheme.
- Newer Homes: Newer installations follow the brown/blue scheme.
- Always Verify: Never rely solely on wire color. Always use a voltage tester to confirm which wire is live before working on any electrical circuit.
- Safety First: When in doubt, consult a qualified electrician. Electricity can be dangerous.
- Mix-and-Match: It's possible to find older wiring mixed with newer wiring during renovations. Be extra cautious in these situations.
What Happens if Live and Neutral are Switched?
If the live and neutral wires are accidentally switched, it can create a dangerous situation. While the circuit may still function, the appliance or device could have its outer casing energized, leading to a risk of electric shock. Additionally, safety devices like circuit breakers may not function as intended.
Disclaimer:
This information is for general knowledge and informational purposes only, and does not constitute professional advice. Always consult a qualified electrician for any electrical work. Incorrect wiring can lead to serious injury or death.
