A 34-chapter interactive guide built from a complete, real-world commercial campus electrical drawing set — Metro Center Corporate Campus. Covers 13.8kV utility service and 13.2kV metal-clad switchgear, campus MV distribution, building power distribution and busway routing, emergency generator paralleling, panel schedules and feeder sizing, lighting control and grounding/lightning protection, short-circuit/protection-coordination/arc-flash/harmonic studies, installation details, and SCADA power monitoring, fire alarm, and commissioning/turnover documentation. Every reference drawing gets its own full-size slide so schedules and dimensions stay legible.
Eight parts spanning 34 chapters: System Overview & Utility Service (campus one-line, 13.8kV service entrance, 13.2kV metal-clad switchgear, MV distribution loop, site plan); Distribution & Building Systems (power riser, building one-line, underground site power, load flow, busway); Emergency & Standby Power (5-generator paralleling plant and ATS distribution); Panels, Circuits & Feeders (panel schedules, branch circuits, feeder sizing, electrical rooms); Lighting & Grounding (lighting control zones, campus grounding/bonding, lightning protection); Protection & Power Quality Studies (short-circuit study, TCC coordination, arc flash per IEEE 1584, arc flash mitigation logic, harmonic analysis per IEEE 519); Installation Details (cable tray, conduit routing and fill, equipment pads); and Monitoring, Fire Alarm & Commissioning (SCADA architecture, fire alarm riser, FAT/SAT, commissioning sequence, turnover package).
Use the Prev / Next buttons at the bottom, or press the arrow keys on your keyboard. Click the ☰ menu button in the top-right to open the table of contents and jump to any of the 34 chapters. Each chapter's reference drawing follows immediately after its text as its own dedicated slide, so every panel schedule, one-line diagram, and study table can be viewed at a readable size.
Electrical engineers and designers working on commercial and campus-scale building projects; electrical contractors and estimators who need to see how a complete commercial drawing set fits together end to end; and PE Power exam candidates and engineering students studying MV switchgear, protection coordination, arc flash analysis, and power quality on a real, fully-worked project rather than isolated textbook problems.
Metal-clad switchgear (IEEE C37.20.2) uses fully drawout circuit breakers isolated from adjacent compartments by grounded metal barriers, with automatic shutters covering the primary contacts when a breaker is racked out. A commercial campus with several buildings and a total load in the multi-megawatt range takes utility service at medium voltage (13.2-13.8kV) rather than low voltage specifically because MV switchgear and cabling carry that much power at far lower current, and therefore far smaller, less expensive conductors, than an equivalent low-voltage system would require.
Multiple generators are connected to a common bus through synchronizing breakers controlled by a paralleling control panel, which matches each generator's voltage, frequency, and phase angle before closing its breaker onto the live bus. Paralleling several smaller generators (rather than one large unit) gives redundancy — losing one unit to a fault or maintenance still leaves the others available — and lets the plant run efficiently loaded units rather than one oversized generator at partial load.
Per IEEE 1584-2018, an arc flash study calculates incident energy (in cal/cm²) at a given working distance from each piece of equipment, based on the available fault current, system voltage, and the protective device's clearing time. That incident energy maps to one of five hazard categories under NFPA 70E, each with its own minimum required PPE, and the result is printed on a field-installed arc flash warning label so anyone working on the equipment knows what protective equipment to wear before opening it.
Variable frequency drives, UPS systems, and LED lighting drivers all draw non-sinusoidal current, injecting harmonic distortion onto the building's electrical bus. IEEE 519-2014 sets limits on Total Demand Distortion (TDD) and individual harmonic currents at the point of common coupling specifically to prevent that distortion from overheating transformers, tripping sensitive equipment, or degrading power quality for neighboring customers on the same utility feeder.
Commissioning runs through seven phases — pre-commissioning planning, submittal review, pre-functional testing, functional testing, integrated system testing, performance verification, and turnover — typically over about 70 days. The turnover package that results organizes project management records, design documents, equipment documentation, testing and commissioning reports, O&M manuals, training materials, and close-out documents (as-builts, certificates) into a complete, indexed record the owner uses to operate and maintain the system for the rest of its service life.
Disclaimer: This guide summarizes general commercial electrical design concepts and an illustrative campus drawing set for educational purposes only. All projects, companies, and personnel depicted are fictional. Always consult a licensed electrical engineer and the applicable NEC, IEEE, and NFPA codes and standards for actual project design, protection studies, and construction.