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Original General Order 95

 

Section IX

 

Joint Poles or Poles Jointly Used 

 

92.2    Police and Fire Alarm Circuits

 

Police and fire alarm circuits which are carried on crossarms are permitted to occupy a position between supply circuits of 0-750 volts and other Class C communication circuits provided the police or fire alarm circuits have a vertical clearance of not less than 2 feet from each of such circuits and the conductors of such police or fire alarm circuits have a clearance of not less than 25 inches from center line of pole and have a weather-resistant covering at least equal to double-braid weatherproofing. In lieu of conductors with weather-resistant covering, non-metallic sheathed cable may be used. Where such cable is supported on a messenger, the messenger shall be ungrounded throughout its length and shall be sectionalized by means of insulators placed 6 feet to 9 feet from each attachment to crossarms. Where a 4-foot neutral space is reserved between supply and communication circuit levels on joint poles, it is recommended that police and fire alarm circuits which are installed in accordance with the foregoing provisions be at a level at the center of such a neutral space.

 

Police and fire alarm circuits which are less than 25 inches from center line of pole, or are attached to the surface of pole, shall have vertical clearances from supply conductors not less than those specified throughout this Order for Class C communication conductors.