2023 Parks and Recreation Aquatics Master Plan

Aquatic Facilities Master Plan FACILITY AUDIT

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Electrical The grounding test results of April 2021 were

Room (Figure E17) , across the equipment and out to the exterior (Figure E18) . The duct outside of the room has rusted through. The branch panel inside the Pool House appeared to be in good condition (Figure E19). The lighting and devices inside the Pool House appeared to be in fair to good condition. The exterior pool lighting was not tested. LED floodlighting should be considered if replacement is chosen.Electrical recommendations include: › Remove the pool apron, the area around the deck within 3’ of the inside edge of the pool, and the pool equipment cups to expose the reinforcing steel and the equipotential bonding means. Install a new copper wire ring around the pool with a bare #8 solid copper conductor. Bond to the reinforcing steel at four (4) or more points around the pool. Install new equipment cups and bond to those cups to supplement the equipotential bonding grid. Then install a new apron. › Replace the existing electrical service with new main and branch panelboards. Provide new ground and new branch circuits in Pool Equipment room. Provide new feeder to pool building. Provide Electric room with treated outside air. › The electrical items inside the Pool House are in fair to good condition. Lights should be replaced with LED fixtures when a ballast replacement is needed.

reviewed. The National Electrical Code, NEC, requires any metallic components of a pool installation within three feet of the inside of the pool wall to be bonded together. The bond is usually achieved through the tie wires connecting the reinforcing steel and copper wires bonding from the pool accessory cups back to the reinforcing steel. A #8 bare copper wire ring is also installed around the pool and connected to the reinforcing steel at four points or more. The resistance in ohms of 1,000 feet of #8 copper is 0.6 ohms. The resistance of a bonding lug connection is between 0.01 and 0.03 ohms. So, the expected resistance between one accessory “cup” and another would be around 1 to 5 ohms. If the measurement is larger than that, then it can be expected that corrosion has taken place. The facility electrical service is located at the northwest corner of the pool deck (Figure E10) . The service is overhead and drops from a utility pole down into the Pool Equipment Room located under that corner of the pool. The electrical service panelboard is a 120/208V, 600A panel with a main circuit breaker. The panel cover shows a large amount of rusting and pitting (Figure E11) . The visible surface of the circuit breakers in the panel shows a fair amount of degradation (Figure E12) . The branch panels in that same room also show a large amount of degradation and pitting (Figure E13). NEC 680 requires a minimum #8 solid copper wire to be run from the vicinity of the pool pump motor to the equipotential bonding grid under the pool deck. We didn’t find this bonding wire, but we did find a bonding wire from the pump motor back to the electrical room (Figure E14) . The copper bonding wire attached to the pool pump has a green patina. The area around bonding lug on the pump motor appears to be corroded (Figure E15) . We also found a wire bonded to a metallic pipe which extended into the slab. The bonding means did not appear to be in a method required by code and was corroded (Figure E16) . The corrosion in the Electric Room is most likely due to the ventilation drawing corrosive air from the Pump

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