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163 <br />D RAFT North Carolina 911 Board Operating Standards — Version 04/14/2011 D RA FT <br />1 5.9 Aerial Cables and Wires. <br />2 5.9.1 Protection shall be provided where cables and wires pass through trees, under bridges, and over <br />3 railroads, and at other locations where damage or deterioration is possible. <br />4 5.10 Wiring Inside Buildings. <br />5 5. 10.1 Conductors at the Public Safety Answering Point shall extend to the operations room in conduits, <br />6 ducts, shafts, raceways, or overhead racks and troughs of a construction type that protects against fire and <br />7 mechanical damage. <br />8 5.10.2 Cables or wiring exposed to fire hazards shall be protected from the hazard. <br />9 5.10.3 At the Public Safety Answering Point, cable terminals and cross connecting facilities shall be <br />10 located either in or adjacent to the operations room. <br />11 5.10.4 All wired dispatch circuit devices and instruments whose failure can adversely affect the <br />12 operation of the system shall be mounted in accordance with the following: <br />13 (1) On noncombustible bases, pedestals, switchboards, panels, or cabinets <br />14 (2) With mounting designed and constructed so that all components are readily accessible <br />15 5.11 Circuit Protection. <br />16 5.11.1 All surge arresters shall be connected to earth ground. <br />17 5.11.2 All protective devices shall be accessible for maintenance and inspection. <br />18 5.11.3 Surge arresters shall be designed and listed for the specific application. <br />19 5.11.4 Each conductor that enters a Public Safety Answering Point from a partially or entirely aerial line <br />20 shall be protected by a surge arrester. <br />21 5.12 Grounding. <br />22 5.12.1 Sensitive electronic equipment determined by the PSAP to be essential to the operation of <br />23 telecommunications and dispatching systems shall be grounded. <br />24 5.12.2 Listed isolated ground receptacles shall be provided for all cord - and - plug - connected essential and <br />25 sensitive electronic equipment. <br />26 5.12.3 Unused wire or cable pairs shall be grounded. <br />27 5.12.4 Ground connection for surge suppressors shall be made to the isolated grounding system. <br />28 5.13 Access. <br />29 5.13.1 All equipment shall be accessible for the purpose of maintenance. <br />30 <br />Page 10 <br />