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® WorleyParsons <br /> resources&energy <br /> 4.19.2 Computer Network System <br /> The in plant computer system will consist of a local area network with the main switching, <br /> termination and isolation equipment located in the electronics room adjacent to the control <br /> room as described in the Instrument/Control Design Criteria. <br /> 4.19.3 Security System <br /> The plant security system will consist of a surveillance camera at the main gate and one <br /> monitor in the plant control room. Additional cameras may be located at other places in <br /> the facility, e.g. water treatment, top of boiler, etc. <br /> The main gate will be controlled from a programmable keypad at the gate and from the <br /> main control room. An intercom system will be provided from the main gate to the control <br /> room. Automatic opening/closing features of the gate will be provided for vehicles exiting <br /> the plant. <br /> 4.20 Cable and Raceway <br /> In general, equipment at grade not located near overhead pipe or cable tray racks will be <br /> fed from underground ducts with other equipment generally connected using above grade <br /> cable tray and conduit systems. Where cable tray is routed in pipe rack with piping, the <br /> cable tray will be routed at the top elevation of the pipe rack above all piping. Covers will <br /> be provided if considered necessary for protection against welding slag or other debris. <br /> Unless otherwise noted, all cables routed underground will be installed in marked concrete <br /> or cement slurry encased duct bank. Above ground circuits will be installed in conduit or <br /> tray. Grouped electrical cables should be routed away from exposure hazards or protected <br /> as required by the Fire Design Mitigation Plan. In particular, care should be taken to avoid <br /> routing cable trays near sources of ignition or flammable and combustible liquids. Where <br /> such routing is unavoidable, cable trays should be designed and arranged to prevent the <br /> spread of fire. <br /> The final design will provide a minimum of 10 percent spare conduits in each duct bank. In <br /> no case will there be less than one spare conduit provided for each application utilized in <br /> that duct bank, (power, control, instrumentation). <br /> Cable trays will be designed for 35% fill. Cable tray will be aluminum unless otherwise <br /> required due to environmental or corrosion issues. <br /> Separation of voltage levels in all raceways will be maintained to meet the CTG <br /> manufacturers cable separation requirements or industry codes and standards whichever is <br /> more conservative. Rigid galvanized steel conduit will be used in duct banks when <br /> required for signal separation. Otherwise, conduit in ductbank will be PVC. All above <br /> ground conduit will be RGS (rigid galvanized steel). <br /> Lodi Energy Center 3.4- 14 LEC AFC <br /> 071608 Rev.A <br />