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AECOM 4.3.12 The Minimum Approach Distance(MAD)as it relates to Voltage varies from jurisdiction to jurisdiction. The MAD or the regulatory minimum distance requirements,whichever is more stringent, shall be maintained. The below chart shows the Phase-to-Phase voltage rating voltages in kilovolts and the MAIDS applicable to all AECOM operations: Minimum Approach Distances(MAD) ApproachVoltage Range(Kilovolts) Minimum Personnel shall allow for equipment movement and electrical line swaying when establishing a M.A.D. 0—50 KV 10(3) Over 50—200 KV 15(5) Over 200—350 KV 20(6) Over 350—500 KV 25(8) Over 500—750 KV 35(11) Over 750—1,000 KV 45(14) Note:This requirement shall apply except where client,local,or governmental regulations are more stringent. Source: American National Standards Institute,Publication B30.5. 4.3.13 An appropriate distance shall be kept between equipment, its occupants,their tools and energized overhead lines, electrical apparatus, or any energized parts. 4.3.14 These minimum approach distances do not apply to a load, equipment, or building that is transported under energized overhead power lines if the total height, including equipment transporting it, is less than 13.5 feet(4.15 meters). • If the travelling equipment, including load, is over 4.15m (13.62ft)a transportation permit shall be acquired from the appropriate jurisdiction to travel on any public road or highway. o Consult local jurisdiction as some US states may use heights of up to 4.45m (14.6ft). o Notification of appropriate utility companies may be required in conjunction with the transportation permit. Jurisdictional requirements shall be verified prior to transport. o Route shall be checked for clearance of overhead electrical and communication lines prior to transport. o A designated signaler will be utilized when the height of the equipment, buildings,tractor/ trailers or any other transport equipment travelling under an overhead electrical line is greater than 4.15m (13.62ft). 4.3.15 Employees shall not place earth or other material under or beside an electrical overhead line if doing so reduces the safe clearance to less than 50 feet(15.25 meters)or, if appropriate to potential hazards associated with other types of overhead obstruction, less than 10 feet(3.05 meters). To maintain a safe distance: • Install warning devices and signs(hang a sign from and mark all guy wires to warn traffic of low clearance; provide warning signage for all overhead services). • Install telescopic, nonconductive posts and flagging across right-of-way at the minimum allowable clearance as allowed by regulations for the line voltage. • Position signs or other devices to determine the"Danger Zone". Overhead Lines&Obstructions(S3AM-322-PR1) Revision 3 July 31,2019 PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 5 of 8