Attachment 2 - Plans 1174390.pdf

This is a technical electrical schematic diagram for a laboratory facility renovation project. The drawing, prepared by Coffman Engineers and Regal Service Co. for the Pacific Basin Agricultural HLD, USDA, depicts a one-line electrical distribution system for an inject holding shelter located in Honolulu, Hawaii.

The schematic illustrates the connection of new electrical infrastructure to existing systems, including two 2000A transformers feeding a new 2 kA electrical handhole. The diagram shows existing switchboard components (350A, 400/277V, 3PH, 6W configurations) with multiple 3-phase circuits and spare capacity, along with replacement of an 80-amp thermal unit disconnect switch. The new inject shed is supplied through a TSB (75 kVA, dry type transformer, 480V, 277/120V, 3PH, 4W, copper windings) with specified amperage capacities and cable runs detailed in the lower right notation. The design includes connections to existing switchboard units, generator backup, and compliance with specified electrical codes and standards for installation of copper conductors, ground rod placement, and cold water pipe proximity requirements.