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Yes, red is used to identify one of the HOT (live) wires for 240vac systems (black is the other HOT wire). Theoretically you have twice the chance of electrocuting yourself with 240v versus 120v because CURRENT = VOLTAGE / RESISTANCE. Twice the voltage, twice the danger. 1/10 of an amp through your heart will KILL you. If you come in contact with 240vac and assuming your body's resistance cold be as low as 300 ohms, you could experience 0.8 amps (8 times what it takes to stop your heart). Note, 120vac can still give you a 0.4 amp jolt which is plenty enough to kill you.

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14y ago
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9y ago

Answer for USA, Canada and countries running a 60 Hertz supply service. Red for live and white for neutral.

Answer for the UK. Until the standard was changed to comply with European Union regulations, the UK used red for the line conductor and black for the neutral conductor. The EU regulation now requires brown for the line conductor and blue for the neutral conductor. All older homes in the UK still have the red/black colouring, but all newer homes have the brown/blue colouring. Older homes with newer extensions will have red/black in the older part and brown/blue in the newer part, and labels are required drawing attention to this mixed system.

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11y ago

If this is a household light circuit, the red wire is often a traveler between three way switches. a second switch (ie for a ceiling fan and its light), another feed from the electrical panel.

it is the code that the ground can only be; bare, green, green with yellow stripes

In US split single phase residential wiring, the red wire is one of the two hot wires. You have 220-240 volts between the red wire and the black wire, and 110-120 between either of those wires and the white (neutral) wire. The green or naked wire is the ground wire and is tied to the white wire in the panel box (and never in any other place).

In rare cases, you may find a duplex wall outlet with the right tab broken and both a red and black wire on the right side, or a duplex outlet with both tabs broken and fed from separate branch circuits. That was sometimes done in kitchens for the sake of heavy 120 volt appliances. That way, both halves of the outlet could pull up to 15 amps each, either being on 2 breakers or a dual pole (220 volt) breaker.

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10y ago

Red is normally the color used for a live wire.

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Q: Is a red wire a grounding wire?
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