Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 258
)iHty,and accessihihty. Cheapness. The relative cost of this method of wiring as com-pared with that of the concealed conduit system, is about fifty per centof the latter if rubber-covered conductors are used, and about fortyper cent of the latter if weatherproof slow-burning conductors are used.As… … Big. 18. Lage Feeders Run Exposed on Insulators. from the standpoint of appearance, and also provided th.at it is notliable to mechanical injury or disarrangement. ^Durability. It is a well-known fact that rubber insulation has arelatively short life. Inasmuch as in this method of wiring, the…
Architecture · Building · Carpentry
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