Cyclopedia of heating, plumbing and sanitation; a complete reference work . Fig. 20. One-Wire Cleat. Large Conducl tors is at least 2\ inches in a two-wire system, and 2?; inchesbetween the two outside conductors in a three-wire system where thepotential between the outside conductors is not over 300 volts. Thecleat must hold the wire at least one-half inch from the surface to whichthe cleat is fastened; and in damp places the wire must be held atleast one inch from the .surface wired over. For larger conductors, 307 IS ELECTRIC WIKIXd from No. 6 to No. I OB. & ,i1 is usual to use singl
Cyclopedia of heating, plumbing and sanitation; a complete reference work . Fig. 20. One-Wire Cleat. Large Conducl tors is at least 2\ inches in a two-wire system, and 2?; inchesbetween the two outside conductors in a three-wire system where thepotential between the outside conductors is not over 300 volts. Thecleat must hold the wire at least one-half inch from the surface to whichthe cleat is fastened; and in damp places the wire must be held atleast one inch from the .surface wired over. For larger conductors, 307 IS ELECTRIC WIKIXd from No. 6 to No. I OB. & ,i1 is usual to use single porcelaincleats r knobs. Figs. 19 and 20 .show a good form of two-wire. Fig. 22. Iron Rack and Insulators for Large of <ral Electric Co., Schenectady, X. V cleat and single-wire cleat, respectively. For large feeder or main conductorsfrom No. 4 0 S. Gauge upward, amore substantial form of porcelain insu-lator should be used, such as shown inFig. 21. These insulators are held iniron racks or angle-iron frames, of whichtwo forms are shown in Figs. 22 ami latter form of rack i- particularly de-sirable for heavy conductors and where anumber of conductors are run this form of rack, any length of con-ductor can be removed without disturb-ing the other conductors. As a rule, the porcelain insulatorsshould be placed not more than 4h feetapart; and if the wires are liable to bedisturbed, the distance between supportsshould be shortened, particularly for smallconductors. If the beams are so farapart that supports cannot be obtainedevery 4| feet, it is necessary to provide arunning board as shown in Fig. 24
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