Energy Basics
Ohm’s Law Triangle: V, I, R in One Picture
Learn the Ohm's Law Triangle in 2026: solve V, I, and R, check a 120 V example, convert units, and recognize limits in real circuits.
Read articleArticles
Latest articles
Practical electrical notes: bills, rates, solar, EV charging, commercial demand, and power factor.
Energy Basics
Subpanel Sizing Basics: Load, Feeder, and Breaker Selection
Subpanel Sizing Basics for 2026: calculate feeder loads, compare panel ratings, and check breaker, wire, grounding, and NEC requirements.
Read articleEnergy Basics
Saddle Bends Explained: 3-Point and 4-Point Layouts
Saddle bends explained for 2026: compare 3-point and 4-point layouts, bend spacing, shrink, and checkable 4-inch conduit saddle examples.
Read articleEnergy Basics
Box Sizes and Volumes Chart: 2026 Reference Guide
Box Sizes and Volumes Chart for 2026: compare square, octagon, and device boxes, verify marked capacity, and calculate NEC box fill.
Read articleUsage
Lumens Per Room: What to Aim For in 2026
Lumens per room explained for 2026: compare room lighting targets, convert footcandles to lumens, and check a 200-square-foot example.
Read articleCommercial
Motor Starting: DOL vs Soft Starter vs VFD — Starting Current Compared
Compare motor starting: DOL vs soft starter vs VFD in 2026, with starting-current ranges, a 10 HP example, torque limits, and NEC 430 checks.
Read articleCommercial
AIC Ratings Explained: Breaker Ratings and Available Fault Current
AIC Ratings Explained for 2026: compare breaker ratings, calculate fault current, and check NEC requirements before selecting equipment.
Read article