Full NEC 220.82 optional method walkthrough for a 2,000 SF house with heat pump and EV charger. Compare to standard method and size the 200A service.
Load balance a 200A panel: measure leg current, reassign single-pole breakers, and check NEC 220.82 demand-factor math for remaining capacity.
Three-phase power calculation: kVA formula, kW vs kVA vs kVAR explained, and transformer sizing with a worked commercial example at 480V.
Step-by-step EV charger circuit sizing under NEC 625: continuous load rule, wire gauge, voltage drop for long runs, and panel capacity check.
Step-by-step guide to sizing a subpanel for a detached workshop or garage. Covers NEC load inventory, demand factors, feeder conductor sizing (copper and aluminum), voltage drop verification, overcurrent protection, and grounding requirements with worked examples.
How to calculate electrical load for new branch circuits using NEC Article 220. Covers the 125% continuous load rule, VA per square foot tables, demand factors, and worked examples for EV charger installations and commercial lighting circuits.