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The diameter of an 18 AWG wire is approximately 1.02 millimeters or 0.0403 inches.
AWG stands for American Wire Gage (gage is spelt gauge in British English)The larger the gauge number, the thinner the wire.
4 AWG wire is much thicker than 18 AWG wire, which means it can handle higher electrical currents and therefore can deliver more power. The power difference between the two wire sizes will depend on the specific application and the amount of current being carried.
It is not recommended to connect 16 gauge wire to 14 gauge wire for a light fixture. Different wire gauges have different ampacity ratings, meaning they can carry different amounts of current safely. It is best to use the same gauge wire for properly and safely conduct electricity.
Yes, 18 AWG wire is safe for 120V applications, as it is rated for up to 16 amps. It is commonly used for many residential electrical wiring applications. However, always consult a licensed electrician for specific wiring requirements to ensure safety and code compliance.