ETP 0172L - Pole Line Equipment II Lab ETP 0172L - Pole Line Equipment II Lab 90 con. hrs. Occupational This lab applies knowledge of blueprint reading to overhead line installations and identifies and classifies oil circuit breakers, primary metering, pole-mounted three-phase reclosers, single- and three-phase transformer and capacitor banks, and pole- and platform-mounted regulators. Course Designations: (CH)