Load Capability of Bare ACSR and All-Aluminum Conductors Based on Long-Time Outdoor Temperature Rise Tests

Data illustrating the wide variation in temperature and temperature rise of a typical large size ACSR (steel-reinforced aluminum cable) conductor under normal variations in weather conditions are presented in this paper. Measurements obtained over a 4-year period at several constant loads on an outdoor test line are used as a basis for increasing the ratings of ACSR and all-aluminum conductors for those installations on the Baltimore system where conductor temperature, instead of losses or regulation, is the governing factor.