14th Street Water Treatment Plant Standby Generator Upgrade

Key Accomplishments

Johnston Construction Company

• Furnished a UL 2200-certified generator package upgraded for NFPA 110 requirements and certified for applicable seismic conditions.
• Furnished a generator-mounted Caterpillar EMCP 4.2B digital control panel with local monitoring, Ethernet telematics, generator-running indication, remote annunciation, and remote emergency-stop functionality.
• Provided a 2,500-amp electrically operated generator circuit breaker with long-time, short-time, instantaneous, and ground-fault protection.
• Furnished a secondary 100-amp circuit breaker for applicable generator auxiliary loads.
• Included an engine-mounted high-ambient radiator, heavy-duty air cleaner, fuel filtration, dual starting motors, battery system, battery charger, charging alternator, and jacket-water heater.
• Furnished generator exhaust components, including a dual-inlet wye connection, 14-inch silencer, flexible connection, insulated exhaust components, thermal blankets, rain cap, and roof thimble.
• Furnished a 2,500-amp portable-generator and load-bank quick-connection cabinet.
• The quick-connection cabinet included a stainless-steel NEMA 3R enclosure, triple circuit-breaker protection, male and female cam-lock connections, phase-rotation monitoring, and source-indicating lights.
• Furnished a 75-gallon indoor generator day tank with secondary containment, transfer-pump controls, supply and return pumps, and multiple fuel-level alarms.
• Furnished a 5,000-gallon UL 2085 fire-rated outdoor fuel-storage tank with secondary containment, level alarms, and access stairs or ladder.
• Included factory-authorized generator startup and a four-hour resistive load-bank test in accordance with NFPA 110.
• Provided spare parts, shipping protection, and a five-year warranty for the generator package.

B & R Electrical Contractors

• B & R Electrical Contractors, Inc. performed the electrical installation associated with the 14th Street Water Treatment Plant standby-generator upgrade.
• Performed electrical demolition of existing conduit, conductors, and connections required to remove the existing generator and install the new standby-power equipment.
• Installed Schedule 40 PVC conduit to match the existing electrical raceway system.
• Furnished and installed THHN copper conductors for the new generator power-distribution connections.
• Installed six 4-inch conduits containing four 600-kcmil conductors between the generator junction box and the triple-switch equipment.
• Installed six additional 4-inch conduits containing four 600-kcmil conductors between the new generator and the triple switch.
• Extended the existing generator feeders by butt-splicing the existing 600-kcmil conductors to new conductors within the generator-room junction box.
• Installed junction boxes required for bottom-fed generator equipment and coordinated conduit entries with the new equipment arrangement.
• Coordinated installation of the triple switch before removal of the existing generator so that temporary-generator service could be maintained when required.
• Connected the generator to the control room for the remote annunciator panel.
• Installed generator-room control wiring and associated raceways required for generator monitoring and operation.
• Disconnected and reconnected electrical systems serving the fuel tank as required for the generator replacement.
• Disconnected and reconnected motor-operated dampers affected by removal and installation of the generator equipment.
• Installed additional conduit and control wiring required to upgrade the generator control system from an EMCP 4.2 panel to an EMCP 4.3 panel.