To achieve proper sag calculation for #2 ACSR, what should be the basis of your measurement?

When calculating the proper sag for #2 ACSR (Aluminum Conductor Steel Reinforced) wire, the measurement should be taken from where the wire is going to tie in. This is significant because the tie-in point is the location where the conductor will actually bear its load and start to sag under its weight and the influence of temperature changes. The sag calculation is essential to ensure proper tension and tension management in the line, which prevents excessive strain on the wire and other structural components.

Correctly measuring from this point accounts for the entire configuration of the line as it will exist in service, including all factors like the distance between poles, the weight of the conductor, and environmental influences such as wind and ice. This helps ensure that the line performs optimally without experiencing sag issues or exceeding tension limits.

Other options, such as measuring from the top of the wood or the outer edge of the pole, do not accurately reflect the operational reality of how the conductor interacts with the pole and the rest of the line. These locations do not take into account the actual bending or tension points of the wire during its operation, which is why the tie-in point measurement is the most practical and effective choice for achieving the correct sag calculation.