Weekly digest #195: EV charging news

What's new in EV charging this cycle

EVSE installs keep climbing, and the calls coming in this week show the same pattern: panel upgrades, load calc questions, and GFCI nuisance trips on Level 2 gear. The 2023 NEC tightened several Article 625 requirements, and the 2026 cycle proposals are pushing harder on energy management and continuous load handling.

If you bid jobs based on 2017 or 2020 code memory, you are leaving money on the table and risking callbacks. Here is what to watch.

Load calculations and the 80% rule

Article 625.41 still classifies EVSE as a continuous load. That means the branch circuit and feeder must be sized at 125% of the EVSE rating. A 48A charger needs a 60A circuit, full stop. No splitting hairs, no rounding down because the homeowner only charges overnight.

Service load calculations under Article 220 trip up a lot of techs when a second EVSE goes in. Standard method versus optional method gives different numbers, and the optional method in 220.82 often saves a service upgrade if you run it correctly.

• EVSE rating x 1.25 = minimum conductor and OCPD ampacity
• Add full EVSE load to service calc unless EMS is listed and installed per 625.42
• Document your calc on the permit, not on a napkin
• Check 310.16 for terminal temperature rating before sizing 60C vs 75C

Energy Management Systems under 625.42

EMS is the cheat code for tight services. A listed EMS lets you connect EVSE loads that would otherwise exceed service capacity, because the system actively limits current draw. The 2023 code cleaned up the language and made it easier to use load management in residential and commercial installs.

The catch: it has to be a listed system, not a homebrew relay setup. Wallbox, Emporia, Span, and several OEM chargers now have listed EMS functionality. Document the listing on your permit submittal or expect pushback at rough inspection.

Field tip: when you spec an EMS, photograph the listing label and EMS settings screen at final. Inspectors are starting to ask, and AHJs in CA and NY have failed installs where the EMS was listed but never enabled.

GFCI, GFPE, and why your 50A outlet keeps tripping

NEC 210.8(A) requires GFCI protection on 125V through 250V receptacles up to 50A in dwelling garages and outdoors. That includes the 14-50 receptacle a lot of homeowners want for portable Level 2 cords. The problem: many EVSE units have internal CCID 20mA ground fault detection, and stacking that behind a 5mA GFCI breaker causes nuisance trips.

Hardwiring the EVSE per Article 625.44 sidesteps the receptacle GFCI requirement, because 210.8 applies to receptacles, not hardwired equipment. For commercial Level 2 and DC fast charging, look at 625.54 and the GFPE requirements, which run at higher trip thresholds suited for the equipment.

• Residential 14-50 for EV use: GFCI breaker required by 210.8(A)
• Hardwired Level 2: no 210.8 GFCI requirement, internal CCID handles it
• If the homeowner insists on a receptacle, spec a GFCI breaker rated for EV duty (Eaton CH and Square D QO have specific listings)
• Commercial DCFC: GFPE per 625.54, not 5mA GFCI

Disconnects, working space, and the 60A threshold

625.43 requires a disconnect for EVSE rated more than 60A or more than 150V to ground, in a readily accessible location. Most residential 48A units skate under this, but the 80A and 100A units now hitting the market do not. Plan the disconnect during the walkthrough, not after the rough.

Working space under 110.26 still applies, and inspectors are catching installs where the EVSE got mounted in a tight garage corner with less than 30 inches of clear width. The depth requirement depends on voltage to ground, but 36 inches is the safe default for residential.

Field tip: when mounting EVSE on a garage wall shared with a panel, keep the dedicated working space clear of both. Two pieces of equipment, two working spaces, and they cannot overlap if both might need service energized.

What's coming in 2026

The 2026 NEC public inputs include proposals to expand EMS recognition, clarify bidirectional charging requirements, and tighten labeling for vehicle-to-home installs. V2H is the next wave, and it lives at the intersection of Article 625, Article 705, and Article 706. If you are not reading those three together, get caught up before the first F-150 Lightning customer calls.

Expect more AHJ scrutiny on service load calcs as multi-EV households become standard. A 200A service with two 48A chargers, a heat pump, and an induction range is the new normal load calc problem. Run the optional method, document EMS where present, and price the panel upgrade if the math says so.

1. Pull the 2023 NEC if your jurisdiction adopted it, and flag every 625 change
2. Build a load calc spreadsheet that handles standard, optional, and EMS scenarios
3. Stock GFCI breakers rated for EV duty, not generic units
4. Price hardwired Level 2 as the default, receptacle as the upcharge