SC Public Utilities Electrical Practice Questions - South Carolina Public Utilities - Electrical Contractor Examination Exam

Overhead sag charts distinguish initial (stringing) sag from final sag primarily because aluminum conductors:

Shrink permanently after the first rain Creep under tension, so sag increases over years at the same temperature Lose all steel-core strength after 30 days Convert from AAC to copper in service

Correct Answer:

Creep under tension, so sag increases over years at the same temperature

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