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All Updated Guides

How to Calculate UPS Battery Size

How to calculate UPS battery size (Ah) from kW and runtime—not a solar battery bank tool. Free formula, derating, and links to the UPS battery calculator.

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HVAC Load vs Capacity (Tons & BTU/h Explained)

HVAC load vs capacity explained: when tons/BTU/h miss the mark. Free examples—screen with the HVAC size calculator.

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Tap Changer Explained: OLTC Types & Working

Tap changer explained: OLTC vs OCTC, resistor vs reactor transition, and IEC 60214 basics. Free types table with voltage regulation examples.

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Industrial NEC Sizing Checklist (OCPD, Feeder & Panel)

Industrial NEC sizing checklist: OCPD, feeder ampacity, and panel rules—not a NFPA book purchase page. Free code-oriented examples with calculator links.

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Preventive Maintenance for Electrical Systems

Preventive maintenance for electrical systems: inspection schedules, IR scan checklist, and free PM examples for industrial plants.

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Voltage Drop Formula (3-Phase VD % with NEC 3% Rule)

Calculate 3-phase voltage drop % for feeders—NEC 3%/5% limits, 480 V worked example. Free formula plus cable size calculator link.

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480 V Factory Distribution: 13.8 kV In, MCC Zones, One-Line That Passed Review

Packaging plant one-line case: 750 kVA service, 480 V MSB, four MCC zones, selective coordination notes—and links to load, transformer, and breaker sizing tools.

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Industrial Electrical Troubleshooting (7 Steps + Checklist)

Industrial electrical troubleshooting in 7 steps for motors, MCC & panels. Free plant checklist—compare expected amps with the 3-phase calculator.

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How to Conduct an Industrial Energy Audit

How to conduct an industrial energy audit: ASHRAE Level 1–3 checklist, ECM payback table, and free examples. Link to the energy estimator for cost screens.

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Electrical Panel Design: Complete Guide for Industrial Applications

Design electrical panels for industrial facilities. Learn NEC requirements, component selection, and layout principles with real-world case studies.

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