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® WorleyParsons <br /> resources&energy <br /> equipment, tubing, gages and instrumentation that contain fluids subject to freezing. All <br /> tubing requiring heat trace will be thermostatically controlled to prevent boil off of the <br /> sensing fluid. Above grade, freeze protected piping that continues below grade will be <br /> insulated and heat traced below frost depth. <br /> Space heaters or heated enclosures will be used for items where heating cables and <br /> insulation is not practical. Power for the heating cable circuits will be supplied from <br /> distribution panels similar to those used for the lighting circuits and will be controlled by <br /> locally mounted individual thermostats. The freeze protection system will provide local <br /> status and alarm indication for each circuit. Each circuit will be provided with electronic <br /> monitoring that indicates heat trace proper operation, failure or damage conditions. <br /> Where required, instruments will be freeze protected by utilizing heated "soft-pack" type <br /> enclosures. Heaters will be centrally located within the enclosures and rated for extreme <br /> plant ambient temperature and wind speed. All process tubing will be continuously heat <br /> traced and insulated through the enclosure wall up to the base of the instrument. <br /> 4.26 Welding and Convenience Receptacles <br /> Welding receptacles with local disconnects (480 V, 60 amp) will be provided in convenient <br /> locations throughout the plant. This includes two at the bottom of each HRSG on opposite <br /> sides, two near each CTG, one near the gas compressor area, and one near each PDC. <br /> Convenience receptacles (120 V)will be provided around the plant as follows: <br /> • PDC per the manufacturer's standard scope of supply,but no less than three (3). <br /> • Mechanical and Electrical Enclosures. One duplex receptacle for each enclosure <br /> • General Plant Area to allow a 100-foot extension cord to reach all areas that require <br /> power for maintenance. <br /> • Inside the CEMS enclosure and near the gas compressor area. <br /> Outdoor convenience receptacles will be the weather proof GFCI type. <br /> 4.27 Temporary Construction Power <br /> Construction Power requirements will be arranged for by the construction contractor to <br /> meet construction needs including service to Construction Offices, Vendors, Engineers, <br /> and Sub-Contractors, plus 250 KW of start-up loads until back feed is available. The <br /> Contractor is responsible for the entire temporary power system design, supply, <br /> installation, safety inspection, maintenance, and removal. <br /> Temporary power will be supplied by the construction contractor for space heaters, motor <br /> heaters, temporary heaters, and lighting as required for proper storage of material or <br /> equipment supplied by the Contractor, Owner or others. <br /> Lodi Energy Center 3.4- 18 LEC AFC <br /> 071608 Rev.A <br />