Answer: The tension in a conductor is directly related to its sag. For a simple span with equal-level supports, the tension (T) is often calculated using the parabolic approximation formula: T = (w * l²) / (8 * S), where:

• T = Horizontal Tension (Newtons or kg)

• w = Weight per unit length of the conductor (N/m or kg/m), including any ice or wind loading

• l = Span length (m)

• S = Sag (m) This formula is accurate for short spans and when the sag is small compared to the span length. For longer spans, especially those over 300 meters, the catenary method provides a more precise calculation, though it is more complex.