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Orange County Health Department Improvements Smith Sinnett /2024008 <br />Hillsborough,NC Orange County Asset Management Services <br />POWER CONDUCTORS AND CABLES 26 05 19 - 5 <br />I Group or otherwise identify neutral/grounded conductors with associated ungrounded conductors inside <br />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,nicking <br />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,and other <br />contaminates.Do not use wire brush on plated connector surfaces. <br />4.Connections for Aluminum Conductors: Fill connectors with oxide inhibiting compound where not <br />pre-filled by manufacturer. <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 devices, <br />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 test <br />information.All required documentation shall be submitted to the Engineer prior to,and as a prerequisite for, <br />final acceptance of the project.All test results shall be included in the Owner's operation and maintenance <br />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 connection <br />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-feeders,or <br />service entrance conductors. <br />1.All current carrying feeder phase conductors and neutrals shall be tested as installed,and before <br />connections are made,for insulation resistance and accidental grounds. This shall be done with a 500 <br />volt insulation resistance tester. In the procedures listed below shall be followed: <br />a.Minimum readings shall be one million (1,000,000)or more ohms for #6 AWG wire and smaller, <br />250,000 ohms or more for #4 AWG wire or larger,between conducts and between conductor and <br />the grounding conductor. <br />b.After all fixtures,devices and equipment are installed and all connections completed to each <br />panel,the Contractor shall disconnect the neutral feeder conductor from the neutral bar and take a <br />insulation resistance reading between the neutral bar and the grounded enclosure. If this reading <br />is less than 250,000 ohms,the Contractor shall disconnect the branch circuit neutral wires from <br />this neutral bar. He shall then test each one separately to the panel and until the low readings are <br />found. The Contractor shall correct troubles,reconnect and retest until at 250,000 ohms from the <br />neutral bar to the grounded panel can be achieved with only the neutral feeder disconnected. <br />Docusign Envelope ID: 2D852F9B-A7CF-462A-9536-444A53AA848A