Journal of electricity, power, and gas . Fig. 3. Exception allowed by law: 1. Telegraph, telephone and signal wires orcables outside incorporated municipalities where nolight or power wires are maintained on same pole orother poles in same line. (c) Minimum vertical clearance between cross-arms carrying more than 600 volts and crossarmscarrying less than 600 volts—four feet. (See Fig. 3.) Exceptions allowed by law: 1. Wires or cables attached to transformers. 2. Wires or cables within buildings or struc-tures. 3. Wires and cables run from underground andplaced vertically on poles. 4. Lead wire
Journal of electricity, power, and gas . Fig. 3. Exception allowed by law: 1. Telegraph, telephone and signal wires orcables outside incorporated municipalities where nolight or power wires are maintained on same pole orother poles in same line. (c) Minimum vertical clearance between cross-arms carrying more than 600 volts and crossarmscarrying less than 600 volts—four feet. (See Fig. 3.) Exceptions allowed by law: 1. Wires or cables attached to transformers. 2. Wires or cables within buildings or struc-tures. 3. Wires and cables run from underground andplaced vertically on poles. 4. Lead wires and cables. 5. One crossarm only, used for light and powerdistribution. (See Fig. 4.) 6. Alternative clearances, for combination con-struction for light and power lines. (See Fig. 5.) Note:—It has been found that the reduced clear-ances for combination construction are not practica- \ SGAvta*e£0jfaCiKi*. Fig-. 7. April 4, 1914.] JOURNAL OF ELECTRICITY, POWER AtfD GAS 295
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