Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 37
U- methcxl will Ik* forhidden liy the Xalional KlrclricCtxlr. The cost of wiring actonling to this method is aUmt one-thinlof the cost (<f circuits run in rigid conduit, and alM)iit nnc-half of thecost of • ill nils nin in armoretl <:ablc. The latter methml of wirin|» aa 14 ELECTRIC WIRING is… … Fig. 15. Knob and Tube Wiring. and tubes, the circuit work being run concealed between the floor beamsand studs of a frame building. The knobs are used when the circuitsrun parallel to the floor beams; and the porcelain tubes are used whenthe circuits are run at right angles to the floor beams.…
Architecture · Building
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