UFC 3 -520-01
June 10, 2002
Include installation, operation, and maintenance costs in the life -cycle
analysis. Different design options can have a significant impact on long -term operation
and maintenance costs.
Introduction. Ensure that electrical drawings are complete and reflect the
intended design. During and after construction, clearly document changes to the
intended design on the drawings. Drawings should be provided in electronic form.
One-Line Diagrams. Show the electrical system layout. Include major
equipment ratings and sizes. Also, include cables, circuit breakers, buses, relaying, and
metering. Provide adequate detail to allow a reviewer to understand how the electrical
system is arranged and operated.
Switchgear Lineups. Identify each section of the lineup. Clearly show
metering and relay requirements. Show internal wiring layouts and show external
Motor Control Center (MCC) Layouts. Identify each MCC cubicle. Include
the following information: starter data; circuit breaker size and setting; overload heater
size; and motor horsepower and feeder size. Include schematic and interconnection
diagrams of wiring connections. Show external wiring, including destinations. Note:
Overload heater elements are usually sized after the final motors are selected and
provided for the project by the suppler/manufacturer. This information might not be
available in the initial design.
Grounding. Show the details of the grounding system with connection
details included on applicable drawings.
Control Panel Wiring Diagrams. Provide internal and external wiring
diagrams. Include material lists. Show destinations of external wiring and associated
Control Schematics. Document the intended process flow plan on the
applicable schematics. Show locations of components. The control schematics must
agree with the associated wiring diagrams. Show ladder diagrams on drawings.
Miscellaneous Interconnection Diagrams. Provide interconnection
diagrams as necessary and ensure they agree with the associated schematics. Identify
locations of components.
Equipment Layouts with Conduit or Cable Tray. Show all electrical
equipment locations and document conduit sizes. Ensure match lines and floor plans
are consistent. Provide cross-sections as necessary. Clearly show all destinations.