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ORANGE COUNTY 230511 - 2 <br /> <br />Emergency Management Warehouse Building Dehumidification Electrical Provisions for HVAC Work <br /> <br /> <br />Disconnect switches shall be sized for all other applications based on total kW rating of the equipment as 1 <br />follows: 2 <br /> 3 <br />Disconnect Switch Sizes for Equipment <br />Switch Rating Maximum kW at System Voltage (V)/ Phase (PH) <br />Amps (A) 120V/ <br />1PH <br />208V/ <br />1PH <br />240V/ <br />1PH <br />277V/ <br />1PH <br />208V/ <br />3PH <br />240V/ <br />3PH <br />480V/ <br />3PH <br />30A 2.8 5.0 5.8 6.6 8.6 10.0 19.9 <br />60A 5.8 10.0 11.5 13.3 17.3 19.9 39.9 <br />100A 9.6 16.6 19.2 22.2 28.8 33.2 66.4 <br />200A 19.2 33.3 38.4 44.3 57.6 66.4 132.9 <br />400A 38.4 66.6 76.8 88.6 115.1 132.9 265.7 <br />600A 57.6 99.8 115.2 133.0 172.7 199.3 398.6 <br /> 4 <br />Dual element fuses shall be provided with disconnect switches. Fuses shall be sized based on the 5 <br />nameplate rating for the equipment. 6 <br /> 7 <br />Equipment enclosures for disconnect switches, starters, variable frequency drives, control panels and any 8 <br />other panel enclosures housing electrical equipment shall be rated based on NEMA standard ratings. Panel 9 <br />enclosures shall be suitable for the environment in which they will be installed. Unless noted otherwise, 10 <br />provide NEMA rated enclosures based on the following environment conditions: 11 <br /> 12 <br />NEMA Enclosure Ratings for Electrical Equipment <br />NEMA <br />Type <br />Environment Condition <br />1 Indoors only, dry, low dust, and non-corrosive environment <br />3R Outdoors, weatherproof and rainproof <br />4 Outdoors, watertight and raintight <br />4X Same as 4 plus corrosion resistant <br />7 Hazardous locations Class I, Groups A, B, C, or D <br />9 Hazardous locations Class II, Groups E, F, or G <br />12 Indoors subject to circulating non-hazardous dust, or dripping non-corrosive liquids <br /> 13 <br />Provide all single phase interlock and control wiring required for sequenced operation of mechanical devices 14 <br />provided for mechanical systems under Division 23. Under Divisions 26-28, a source of power for these 15 <br />devices shall be provided and extended to the devices under Division 23. 16 <br /> 17 <br />Make all power wiring connections for mechanical equipment as recommended by the equipment 18 <br />manufacturer. Under Divisions 26-28, power wiring to the line side of a disconnecting provided and installed 19 <br />under Division 23 will be provided. 20 <br /> 21 <br />Some items of equipment may require conductor and/or raceway combinations different from the 22 <br />supply conductors provided under Division 26-29 to the equipment disconnect; coordinate and 23 <br />provide connections as recommended by the equipment manufacturer. 24 <br /> 25 <br />Division 23 Contractor is responsible for providing and installing fuses in disconnects that supply Division 23 26 <br />utilization equipment. 27 <br /> 28 <br />Provide any required power wiring not specifically shown on the electrical drawings (E-Sheets) or specified 29 <br />in Divisions 26-28. 30 <br /> 31 <br />Install duct smoke detectors furnished under Divisions 26-28 and incorporate smoke detectors in interlock 32 <br />and control wiring. Provide appropriate access doors for duct smoke detectors. 33 <br /> 34 <br /> 35 <br />DocuSign Envelope ID: 7668B866-6C26-485C-9A45-DAAB5D4BD951