Orange County NC Website
Browse       Search
Orange County West Campus Office Building -HVAC <br />PDC Project 23020 Power Conductors and Cables 26 05 19 - 5 <br />building structure. Do not provide support from raceways,piping,ductwork,or other systems. <br />G.Install conductors with a minimum of 12 inches of slack at each outlet. <br />H.Neatly train conductors inside boxes,wireways,panelboards and other equipment enclosures. <br />Condcutors shall not be laced or bundled to avoid overheating. <br />I.Group or otherwise identify neutral/grounded conductors with associated ungrounded conductors <br />inside enclosures in accordance with NFPA 70. <br />J.Make wiring connections using specified wiring connectors. <br />1.Remove appropriate amount of conductor insulation for making connections without cutting, <br />nicking or damaging conductors. <br />2.Do not remove conductor strands to facilitate insertion into connector. <br />3.Clean contact surfaces on conductors and connectors to suitable remove corrosion,oxides, <br />and other contaminates.Do not use wire brush on plated connector surfaces. <br />K.Insulate ends of spare conductors using vinyl insulating electrical tape. <br />L.Unless specifically indicated to be excluded,provide final connections to all equipment and <br />devices,including those furnished by others,as required for a complete operating system. <br />3.04 FIELD QUALITY CONTROL <br />A.All tests shall be completely documented indicating time of day,date,temperature and all pertinent <br />test information.All required documentation shall be submitted to the Engineer prior to,and as a <br />prerequisite for,final acceptance of the project.All test results shall be included in the Owner's <br />operation and maintenance manual. <br />B.Inspect and test in accordance with NETA ATS,Section 7.3.2. <br />1.Perform each of the following visual and electrical tests: <br />a.Compare cable data with drawings and specifications to ensure compliance with contract <br />documents. <br />b.Inspect exposed sections of conductor and cable for physical damage and correct <br />connection according to the single-line diagram. <br />c.Test bolted connections for high resistance using one of the following: <br />1)A low-resistance ohmmeter. <br />2)Calibrated torque wrench. <br />d.Inspect compression-applied connectors for correct cable match and indentation. <br />e.Inspect for correct identification. <br />f.Inspect cable jacket and condition. <br />g.Continuity test on each conductor and cable. <br />h.Uniform resistance of parallel conductors. <br />C.Insulation resistance test is required for all feeder conductors prior to energizing feeders,sub- <br />feeders,or service entrance conductors. <br />1.All current carrying feeder phase conductors and neutrals shall be tested as installed,and <br />before connections are made,for insulation resistance and accidental grounds. This shall be <br />done with a 500 volt insulation resistance tester. In the procedures listed below shall be <br />followed: <br />a.Minimum readings shall be one million (1,000,000)or more ohms for #6 AWG wire and <br />smaller,250,000 ohms or more for #4 AWG wire or larger,between conducts and <br />between conductor and the grounding conductor. <br />b.After all fixtures,devices and equipment are installed and all connections completed to <br />each panel,the Contractor shall disconnect the neutral feeder conductor from the neutral <br />bar and take a insulation resistance reading between the neutral bar and the grounded <br />enclosure. If this reading is less than 250,000 ohms,the Contractor shall disconnect the <br />branch circuit neutral wires from this neutral bar. He shall then test each one separately <br />to the panel and until the low readings are found. The Contractor shall correct troubles, <br />reconnect and retest until at 250,000 ohms from the neutral bar to the grounded panel <br />can be achieved with only the neutral feeder disconnected. <br />Docusign Envelope ID: 8DED1454-68D2-4E36-9FC6-E56FF2124E5D