Chicago : Engineering and Contracting Pub. Co. · leaf 658
allation of a system equal to or betterthan a pipe and cable sheath drainage sys-tem consisting of insulated copper wires, pipestraps, ammeters, etc., which limits the max-imum amperes drained from this sub-surfacemetallic work to 10 per cent of the total out-put of the station. The ordinance as it… … Fig. 1.—Ground Clamp Connection of 500,000 C. M. Cable for 6-in. Water Pipe. 644 ENGINEERING & CONTRACTING Vol. XXXVI. No. 24. drainage or any other kind of a return feedersystem, without material damage being doneto the pipes and other sub-surface metallicwork lying within the affected areas.…
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