Power Calculator Calculator for Indiana
NEC 2020 power calculator math for EV charger installers working in Indiana.
Converting between kW and amps is the entry point for nearly every Indiana EV install spec — manufacturers publish kW, but the panel, breaker, and feeder live in amps.
Worked example for Indiana
A 150 kW EVSE draws roughly 625 A at 240 V single-phase, or 180 A at 480 V three-phase. Apply the NEC 2020 125% continuous-load multiplier before sizing the OCPD or feeder. Duke Energy Indiana typically meters DCFC sites at the 480 V three-phase service in Indiana.
Code & Utilities
The applicable code in Indiana is the NEC 2020, which the state adopted in 2022. That includes Article 625 (Electric Vehicle Power Transfer System) requirements: 125% continuous-load sizing on EVSE branch circuits, GFCI protection at outdoor receptacles, and provisions for energy management systems on shared circuits.
Major electric utilities serving Indiana include Duke Energy Indiana, AEP Indiana Michigan Power, NIPSCO, Indianapolis Power & Light. Each has its own service-upgrade timeline, EV rebate availability, and metering rules — confirm them before quoting commercial work.
Climate & Ampacity
Indiana's representative summer design ambient is around 90°F, which yields a 0.88× ampacity correction factor at 75°C terminations per NEC 310.15(B)(1). Because the correction is below 0.9, conductors that "look fine" on a 30°C ampacity table will not carry their nameplate current here — always derate explicitly.
Indiana takeaway
For three-phase math, always confirm the actual nameplate power factor — DCFC equipment is usually 0.95+ but older site-rated equipment can be lower, which changes the apparent power and the conductor pick.