Enough Electrical Service Capacity: Data-based Load Calcs and New Load Shed Technologies

This National Electrical Code (NEC) course supports the 15 hours of NEC-based continuing education required of Vermont Master and Journeyman electricians during each three-year renewal cycle (26 V.S.A. §908). Through Vermont metered-data findings and worked examples, it demonstrates how to right-size residential services and panels using data-driven load calculations under NEC 220.87 and UL-listed load-management technologies, enabling code-compliant electrification of heating, water heating, cooking, and EV charging without unnecessary service or panel upsizing.

Topic Outline (60 minutes)

• Why right-sizing matters: grid impact, cost, and equity (10 min)
• What Vermont homes actually use: LBNL/VEIC metered-data findings (10 min)
• NEC residential load-calculation methods compared (10 min)
• The NEC 220.87 metered-data method, step by step (15 min)
• UL-listed load-management & load-shed devices (10 min)
• Q&A and Efficiency Vermont pilot participation (5 min)

State of VT DFS Master and Journeyman Electrician continuing education credits pending (1hr.)