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OC Motor Pool and Maintenance Shop <br />PDC Project 23017 Conduit for Electrical Systems 26 05 33.13 - 7 <br />5.Provide insulating bushings or insulated throats at all conduit terminations to protect <br />conductors. <br />6.Secure joints and connections to provide maximum mechanical strength and electrical <br />continuity. <br />7.Condulet fittings shall not be used in lieu of pull boxes. <br />K.Penetrations: <br />1.Do not penetrate or otherwise notch or cut structural members,including footings and grade <br />beams. <br />2.Make penetrations perpendicular to surfaces unless otherwise indicated. <br />3.Where conduits penetrate waterproof membrane,seal as required to maintain integrity of <br />membrane. <br />a.All raceway penetrating exterior walls or other water proof membranes shall slope away <br />from the building with a minimum slope of 4"over 100 feet. <br />4.Make penetrations for roof-mounted equipment within associated equipment openings and <br />curbs where possible to minimize roofing system penetrations.Where penetrations are <br />necessary,seal as required to preserve integrity of roofing system and maintain roof <br />warranty. <br />5.Install firestopping to preserve fire resistance rating of partitions and other elements.Refer to <br />penetration details on plans. <br />6.Where conduits cross building expansion joints or pass between areas with a temperature <br />difference of 14 degrees C,provide expansion fittings on all raceway. <br />L.Underground Installation: <br />1.Minimum Cover,Unless Otherwise Indicated or Required: <br />a.Underground,Exterior: 24 inches. <br />2.Provide underground warning tape six to eight inches below finished grade directly above <br />raceway.Tape shall be six inches wide with a minimum thickness of seven mil,non- <br />distorting,colorfast,no-stretch,600 pound tensile strength per six inch width,ultraviolet light <br />fast.Message must repeat within a maximum of 40 inches.Painted legend shall be indicative <br />of the type of underground line. <br />M.Concrete Encasement: Where conduits not otherwise embedded within concrete are indicated to <br />be concrete-encased,provide concrete in accordance with Section 03 30 00 with minimum <br />concrete cover of 3 inches on all sides unless otherwise indicated. <br />N.Ductbanks containing conductors of 600 volts or more shall be concrete encased with red dyed <br />concrete. <br />O.Conduit Movement Provisions: Where conduits are subject to movement,provide expansion and <br />expansion/deflection fittings to prevent damage to enclosed conductors or connected equipment. <br />This includes,but is not limited to: <br />1.Where conduits cross structural joints intended for expansion,contraction,or deflection. <br />2.Where calculated in accordance with NFPA 70 for rigid polyvinyl chloride (PVC)conduit <br />installed above ground to compensate for thermal expansion and contraction. <br />3.Where conduits are subject to earth movement by settlement or frost. <br />P.Condensation Prevention: Where conduits cross barriers between areas of potential substantial <br />temperature differential,provide sealing fitting or approved sealing compound at an accessible <br />point near the penetration to prevent condensation.This includes,but is not limited to: <br />1.Where conduits pass from outdoors into conditioned interior spaces. <br />2.Where conduits pass from unconditioned interior spaces into conditioned interior spaces. <br />3.Where conduits penetrate coolers or freezers. <br />Q.Provide 200 pound tensile strength pull string in all empty conduits and in conduits where <br />conductors and cables are to be installed by others.Leave minimum slack of 12 inches at each <br />end.All empty conduits shall terminate in a junction box. <br />R.All ducts shall be sealed at terminations,using sealing compound and plugs,as required to <br />withstand 15 psi minimum hydrostatic pressure. <br />3.03 FIELD QUALITY CONTROL <br />Docusign Envelope ID: EF9C08D2-5B75-438B-8D6D-8473F81BD7C4