An account is given of various methods used by a telephone company to minimize the corrosion of lead sheathed underground communication cables. Controlled drainage connections were established into all d-c railway substations, forced drainage systems set up to overcome end effects and use made of rectifiers, magnesium anodes and magnesium ribbon to overcome anodic conditions.
Utility structures were consistently isolated from each other. Insulation joints were used at building entrances, resistance bonds were avoided at pipe line crossings and insulators used in anchor guys. But the advantages of isolation will soon need reconsideration in view of the growing tendency to interconnect telephone cable sheaths and power company multi-grounded neutral system. 5.2.1, 7.7, 8.2.1
