General Order 95
Section IX
Joint Poles or Poles Jointly Used
92.2 Police and Fire Alarm Circuits
Police and fire alarm circuits and governmental agency control
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.