Employes shall promptly report to a superior any dangerous or unusual conditions observed. In particular, they shall report the presence of gas, broken insulators, bad insulation on wires, defective third-rail construction, live frames of motors, broken ground wires on motor frames, and sparking, arcing, or shocks, noticed at any point as well as any fallen, crossed, or abnormally sagging wires, whether electric wires or not. This includes trolley wires at switches and crossings and wires injured through falling roofs.
34 Pa. Code § 39.481
This section cited in 34 Pa. Code § 39.461 (relating to general requirements); and 34 Pa. Code § 39.471 (relating to general requirements).