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OC Sportsplex Pool HVAC Unit Replacement <br />PDC Project 23022 Heat Tracing for HVAC Piping 23 05 33 - 2 <br />C.All heat-tracing applications with continuous exposure temperatures from 150 degrees F to 250 <br />degrees F or intermittent exposure temperatures from 185 degrees F to 420 degrees F shall use <br />self-regulating cables. <br />D.Self-regulating cable shall vary its power relative to the temperature of the surface of the pipe or <br />the vessel.The cable shall be designed such that it can be crossed over itself and cut to length in <br />the field. <br />E.Self-regulating heating cable shall be designed for a useful life of 20 years or more with "power on" <br />continuously,based on the following useful life criteria: <br />1.Retention of at least 75 percent of nominal rated power after 20 years of operation at the <br />maximum published continuous exposure (maintain)temperature. <br />2.Retention of at least 90 percent of nominal rated power after 1000 hours of operation at the <br />maximum published intermittent exposure temperature.The testing shall conform to UL <br />746B,IEC 216-1 Part 1. <br />F.All cables shall be capable of passing a 2.5 kV dielectric test for one minute (ASTM 2633)after <br />undergoing a 0.5 kg-m impact. <br />G.Factory Rating and Testing: Comply with IEEE 515.1. <br />H.Heating Element: <br />1.Provide pair of parallel No.16 nickel coated stranded copper bus wires embedded in cross <br />linked conductive polymer core with varying heat output in response to temperature along its <br />length so that cable may be used directly on plastic or metallic pipes.Cables shall have a <br />temperature identification number (T-rating)of T6 (185 degrees F)without the use of <br />thermostats. <br />2.Terminations: Waterproof,factory assembled,non-heating leads with connector at one end <br />and water-tight seal at opposite end. <br />3.Capable of crossing over itself without overheating. <br />I.Insulated Jacket: Flame retardant polyolefin. <br />J.Minimum Self-Regulating Indices: <br />Heating Cable S.R.Index (W/deg F) <br />1.3 W/ft 0.038 <br />2.5 W/ft 0.060 <br />3.8 W/ft 0.074 <br />4.10 W/ft 0.100 <br />K.The self-regulating index is the rate of change of power output in watts per degree Fahrenheit as <br />measured by the temperatures of 50 degree F and 100 degree F and confirmed by the type of test <br />and published data sheets. <br />L.In order to ensure that the self-regulating heating cable does not increase power output when <br />accidentally exposed to high temperatures,resulting in thermal run-away and self-ignition,the <br />cable shall produce less than 0.5 watts per foot when energized and heated to 350 degrees F for <br />30 minutes.After this test,if the cable is re-energized,it must not have an increasing power output <br />leading to thermal runaway. <br />M.The self-regulating cable shall retain at least 90 percent of its original power output after having <br />been cycled 300 times between 50 degrees F and 210 degrees F,allowing at least six minutes of <br />dwell time at each temperature. <br />N.Cable Cover: Provide tinned copper and polyolefin outer jacket with UV inhibitor. <br />O.A integral ground-fault protection device set at 30 mA,with a nominal 100-ms response time,shall <br />be included and used to protect each circuit. <br />P.Maximum Power-On Operating Temperature: 150 degrees F. <br />Q.Maximum Power-Off Exposure Temperature: 185 degrees F. <br />2.02 OUTER JACKET MARKINGS <br />A.Name of manufacturer,trademark,or other recognized symbol of identification. <br />Docusign Envelope ID: D4F3B98E-0756-4A0C-A3AD-05AA32D39F1C