NM CID EL-1 Practice Questions - New Mexico CID EL-1 Electrical Distribution Systems, Including Transmission Lines Examination Exam

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An overhead ACSR span is sagged in cool weather to the initial (unloaded) stringing sag. After years of load, wind, and ice, the clearance to a roadway is checked at maximum operating temperature. The sag that must be used for that NESC clearance check is:

the initial cool-weather stringing sag, because metal does not creep the final sag at the maximum conductor temperature and loading condition required by NESC Rule 232A zero sag, because ACSR is assumed ruling-span level one-half the ruling span, regardless of temperature

Correct Answer:

the final sag at the maximum conductor temperature and loading condition required by NESC Rule 232A

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