EV Charger Load Calculator for Florida
NEC 2020 ev charger load math for EV charger installers working in Florida.
Sizing an EV charger circuit in Florida starts with NEC 2020 Article 625 — the EVSE branch must be sized to 125% of the continuous load. Hot-climate warm-band states like Florida (92°F design ambient) also force a 0.88× ampacity correction at 75°C terminations.
Worked example for Florida
For a 48 A Level 2 charger on a 240 V single-phase circuit, the OCPD is sized to 60 A (48 × 1.25 = 60.0 A, rounded up to the next standard breaker). The conductor must carry 60 A after Florida's 0.88× correction — that typically lands at #6 AWG copper THWN-2 for a residential garage run, with conduit fill checked separately if you're stacking multiple home runs.
Code & Utilities
Florida currently enforces the NEC 2020 edition, adopted in 2023. 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.
Florida's primary EV-relevant utilities are Florida Power & Light, Duke Energy Florida, Tampa Electric, Florida Public Utilities. Always verify the applicable tariff and any utility-specific requirements (CT cabinets, metering enclosures, demand limiters) at design time.
Climate & Ampacity
In Florida, the 92°F summer ambient drives a 0.88× 75°C ampacity correction. Bake this into every Level 2 and DCFC conductor pick before you commit to a wire size. 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.
Florida takeaway
Always cross-check the EVSE manufacturer's listed maximum overcurrent rating; Florida Power & Light may also have specific service-upgrade or load-management requirements you'll need to coordinate before final inspection.