1
Electrical Energy Efficiency for U.S. Buildings and Facilities
A practical engineering framework for reducing electrical losses and operating cost through load analysis, equipment selection, and controls.
12 min readintermediate
Intermediate
Lighting Retrofit Planning and Controls for U.S. Facilities
Plan efficient lighting upgrades for U.S. facilities with first-pass illuminance checks, control selection, branch-circuit sanity review, and commissioning discipline.
22 hours3 articlesUpdated April 24, 2026
Learning Objectives
- Check target light levels and fixture counts with lumen-method and illuminance workflows
- Use electrical sanity checks to verify lighting-circuit and retrofit assumptions
- Select occupancy, scheduling, and daylight controls that support energy savings and usability
- Close lighting retrofits with commissioning criteria tied to power, light levels, and operating schedules
Prerequisites
Electrical fundamentals
Course Content
- 2Practical Ohm's Law Checks for U.S. Electricians and Technicians
A field-ready workflow for applying Ohm's Law to U.S. branch circuits, control circuits, and resistive troubleshooting checks without overstating what the formula can prove.
10 min readbeginner - 3Electrical Safety Workflows for U.S. Installation and Maintenance
A practical U.S.-market guide to planning de-energized work, applying lockout/tagout, verifying absence of voltage, and closing electrical work with controlled re-energization.
12 min readintermediate
Practice with Calculators
Lighting Design Calculator
Preliminary lumen-method screen for total lumens, fixture count, and basic layout spacing.
Lumen Calculator
Convert watts and lumens, solve lm/W, and estimate room lumens from area and target illuminance.
Illuminance Calculator
Estimate average footcandles or lux from lumens, area, utilization, and light-loss assumptions.
Electricity Cost Calculator
Estimate daily, monthly, and annual electricity cost from watts, hours, and utility rate.
Ohm's Law Calculator
Calculate voltage, current, and resistance
Power Calculator
Solve DC, single-phase AC, and balanced three-phase power relationships from voltage, current, power factor, and power values.