City of Lacey | P2S

City of Lacey

Arc Flash Study

  • Project Overview

    P2S performed a short circuit, coordination, and arc flash study at 79 sites for the City of Lacey, including pump stations, lift stations, wells, reservoirs, park facilities, and buildings. The study’s goal was to determine the arc flash protection boundary and incident energy levels in the work areas of the electrical distribution system and determine the PPE required for employees engaging in energizing electrical work to protect against thermal incident energy produced from an arc flash.

    The project required extensive site visits to obtain existing field information due to the lack of complete as-builts for some of the sites. The team also coordinated with the electrical utility company, Puget Sound Energy, to obtain all pertinent information needed to accurately perform the arc flash study.

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  • Solution

    P2S performed several site visits to gather all existing information and prepared field survey reports to document existing conditions and provide assessments of the equipment and recommendations for improvements. P2S also prepared colored single-line diagrams in AutoCAD to be installed at each site for use by maintenance personnel. Additionally, P2S developed a short circuit study report, coordination study with time-current curves for all overcurrent protection devices on all sites, arc flash study report, and printed arc flash labels to be installed on each equipment in accordance with NFPA 70E-2021 and IEEE 1584. P2S also provided an 8-hour NFPA 70E electrical safety training to City staff and electricians.

    In addition, P2S also created a nomenclature for all the equipment in order to identify and differentiate between different sites and types of equipment between different deliverables.

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