A 1mm single wire is a very light electrical cable used mainly for low-current wiring like small lighting points and control circuits in Nigeria.
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Meaning of “1mm Single Wire”
• 1mm2 → Very small conductor size (thin wire)
• Single core → Only one conductor inside
• Mostly made of pure copper for good conductivity 
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Construction
1. Copper Conductor
• Solid or single-strand copper
• Ensures efficient flow of electricity
2. PVC Insulation
• Protects against shock and short circuit
• Heat resistant and flame retardant
Usually comes in colors like red, blue, black, green, yellow