Sizes | Cable

This guide is for educational purposes. Electrical installation work must comply with local regulations and should be performed by a licensed electrician.

The two most common conductor materials are copper and aluminum. Copper is the industry standard for most applications due to its excellent conductivity, flexibility, and tensile strength. Aluminum, while having about 61% of the conductivity of copper, is significantly lighter and cheaper. For this reason, aluminum is often preferred for high-voltage overhead transmission lines and large industrial feeders where weight and cost are paramount. However, because aluminum is less conductive, a larger cross-sectional area is required to carry the same current as a smaller copper cable. cable sizes

The size of a cable refers to the cross-sectional area of the conductor, which is typically measured in square millimeters (mm²) or circular mils (CM). The cable size is crucial because it affects: This guide is for educational purposes

You can't just pick a cable based on appliance plug size. You must consider: Copper is the industry standard for most applications

To understand cable sizing, one must first understand the materials involved. The "size" of a cable primarily refers to the cross-sectional area (CSA) of its conductor, usually measured in square millimeters ($mm^2$) or American Wire Gauge (AWG). The conductor is the pathway for electrons.

(from your local electrical code — NEC, BS7671, AS3000).