Composed of many fine wires; designed for portable equipment or cables that require regular movement.
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A single wire used for fixed installations where rigidity is acceptable. It offers the lowest resistance and cost. Composed of many fine wires; designed for portable
Multiple wires twisted together for fixed installations. These are easier to bend during construction than Class 1. It offers the lowest resistance and cost
Covers copper (plain or tinned), aluminum, and aluminum alloy. Note that aluminum is not permitted for flexible Class 5 or Class 6 conductors.
Features very fine wires for applications like industrial robots or handheld tools that undergo continuous flexing. 2. Nominal Cross-Sectional Areas
The standard divides conductors into four distinct classes based on their flexibility and construction: