Elena Vance, PE
Lead Electrical Systems Engineer • Technical Review Editor
Biography & Professional Background
Elena Vance is the Lead Electrical Systems Engineer and Head Technical Editor at WireSizerPro. With more than 16 years of hands-on experience spanning utility-scale distribution, commercial facility switchgear, and high-density residential electrification, Elena oversees the technical accuracy of WireSizerPro’s wire sizing algorithms, ampacity tables, and National Electrical Code (NEC) compliance references.
Beginning her career as a field electrician before completing her Bachelor of Science in Electrical Engineering (BSEE) at Purdue University, Elena brings a rare dual perspective: practical jobsite installation realities coupled with deep mathematical and thermal modeling rigor. Her engineering focus centers on continuous duty factor derating (NEC 625 & 210), circular mil voltage drop mitigation over long feeders, and equipment terminal thermal dynamics under sustained loads.
Primary Focus Areas
- Residential & Commercial Level 2 EVSE Infrastructure (NEC 625)
- Feeder Voltage Drop & Circular Mil Computations
- 75°C vs. 90°C Terminal Temperature Termination Limits (NEC 110.14(C))
- Conduit Fill Capacity & Thermal Derating (Chapter 9, Table 1)
Code Verification Standards
- NFPA 70: National Electrical Code (2020, 2023, and 2026 Editions)
- IEEE 141: Recommended Practice for Electric Power Distribution
- UL 2594 & UL 1998: Electric Vehicle Supply Equipment Standards
- NEMA WC 70: Non-Shielded Power Cables Rated 2000 Volts or Less
Technical Review Protocol
At WireSizerPro, every calculator equation, formula derivation, and installation guide is audited to ensure exact compliance with enforced building and electrical codes:
“Improper conductor sizing or failure to account for continuous duty cycles introduces severe thermal runaway risks and voided warranties. Our engineering goal is simple: provide verified, empirical math that eliminates guesswork for electricians, engineers, and homeowners alike.” — Elena Vance, PE