Show SHIP LIGHTING liaw electrical casare biow fall alzi for burpoe when electrical plants wens first in stalled aboard ship lead encased incased cables run in ordinary molding were used al inet entirely and in caso of iron ships the hull was frequently employed for the return circuit the latter method soon passed cut of uio for it not only increased tho fire hazard but was in efficient and also liable to give rise to disturbing influences on the ship s coin pisses load encased incased conductors in ordinary molding were used on tie first two united states men of w ar having elac trie plants the trenton ai 1 omaha but with unsatisfactory results in each case in the latter ship the electrical plant of which was installed by the writer in load encased incased port and starboard passed through holes bored in live c A one 1 ole to about each six deft of run and the writer has a vh id recollection of the difficulties encountered in boring several hundred throe quarter and 1 alf inch holes through about eight inches of snarled oal ery nearly as hard to pierce as borne of the bougner metals it is perhaps to say that the cost of labor and tools was no small item in the cost of installation lead encased incased conductors were finally discarded except in some special aoa as the protection from injury to the in Bu lation and from moisture w inch the lead sheath was supposed to give was found to be illusory dents caused short circuiting on the sheath of the conductors while punctures the entrance of moisture led to bad grounds as well aa short circuits at the present day what may bo call ed a composite system for the in stalla tion of the distributing conductors m employed ranal security in all parts of the installation 11 the object kept in view and to obtain this systems are blended together as one while molding and flexible conduits are used in the saloons and caan s the conduct org in the machinery spaces and holds are run in iron conduit wl ich are thor on the inside and special fittings are employed 1 in pashing pasi ing through the decks and bulkhead Is cial w atar tight switches cutouts and fixtures are also ivied wherever thero is exposure to the E 0 ber nard in cassiar s |