Methods
One page per module: what the check does, which inputs it uses, the formulas and assumptions behind it, what it does not check, and the standards it points to.
Cables & Raceways
Sizing, voltage drop, fill and conductor data.- Cable Check →
How current, size adequacy and voltage drop are screened.
- Conduit Fill →
Fill percentage from the dimensions you supply, against the limit for the number of conductors.
- Tray Fill →
Occupancy of a cable tray by area and by width.
Loads & Power Quality
Current, power triangle, power factor and loading.- Full-Load Current →
Formulas and assumptions for converting power to current.
- kVA Triangle →
The power triangle relating kW, kVAR, kVA and power factor.
- Loading & Headroom →
How percent loading and headroom are aggregated up the system.
- Motor Starting Voltage Dip →
The constant-impedance method for the bus dip and motor voltage during starting.
- Power Factor Correction →
Capacitor sizing for a target power factor, and the cautions that come with it.
Short Circuit & Protection
Fault current, protective devices and relaying.- Short-Circuit Duty: ANSI vs IEC →
How the ANSI and IEC 60909 methods differ, and how each is compared with breaker ratings.
- Transformer Short-Circuit →
Per-unit estimate of bolted secondary fault current and its limits.
Power Sources & Backup
Generators, UPS, batteries and solar.- Emergency Generator Sizing →
The PG1–PG3 method: running load, voltage dip on starting, instantaneous engine load.
- Solar PV Area & Output →
Winter-solstice row spacing, ground coverage ratio and the annual energy estimate.
- Stationary Battery Sizing →
The IEEE 485 section method and the capacity rating factor.
Grounding, Lightning & Corrosion
Electrodes, step and touch voltage, lightning risk, cathodic protection.- Cathodic Protection Groundbed →
Current, anode count and life, Dwight and Sunde groundbed resistance, rectifier rating.
- Ground Grid Step & Touch Voltage →
The IEEE Std 80 simplified equations, their range and what they leave out.
- Ground Rod and Wire Resistance →
Dwight formulas for rods and horizontal wire, mutual resistance, rods and wire together.
- Lightning Risk Assessment →
Collection area and the expected versus tolerable strike frequency.
Electrical Rooms & Lighting
Heat dissipation, cooling and illumination.- Electrical Room Heat Load →
Loss models per equipment type, DOE transformer losses, BTU/hr, tons and ventilation airflow.
- Illuminance (Lumen Method) →
Room cavity ratio, luminaire count, grid layout and spacing check.
Reliability & Topology
Single points of failure and resilience of the distribution.- Contingency Study & Supply Reliability Score →
Deterministic plant contingency screening, restoration grades, survey failure rates, and the 0–10 supply reliability and capital scores.
- Resilience Score →
How the relative resilience index is built. Not an availability figure.
- Single Point of Failure →
How single-outage scenarios are generated and evaluated.
Testing & Maintenance
Checklists and field test corrections.- Maintenance Checklist →
How checklist items, instrument classes and document pointers are assembled.