NEC 2026 · Article 130 · Open book
Manage the load.
Know the limits.
Four ways to practice energy management and power control. Choose a tab, open your Code book, and work the job.
The distinction is the required overload-control function. Learn what the job needs, what the controls may do, and what the installation must show.
Untimed practice · No sign-inDecision practice
EMS or PCS?
Choose the function the job requires.
Opening your Article 130 practice…
Reference desk & learning notes
Article 130 Part I covers general EMS requirements. Part II adds requirements for EMS with PCS overload-control functionality. Use NEC 2026, printed pages 70-89 and 70-90, for the complete provisions.
These are original classroom scenarios and plain-language explanations. A decision marked permitted uses only the supplied facts; it is not an approval of a complete installation. The shop uses a supplied approved current limit, not a wire or breaker sizing calculation.