NEC Article 625 EV Charging
Tesla Wall Connector Wire & Breaker Size
The Wall Connector is field-adjustable, so the wire and breaker follow the amp setting you commission. Here is the full-output spec, the dial-down table for every setting, and the install calculator, all on the NEC Article 625 continuous-load basis.
Wall Connector Amp Setting to Wire & Breaker
Pick the amp setting your circuit supports and commission the charger to it. Each row is the charger output at 125% continuous, rounded to a standard breaker, with the 75°C copper conductor.
| Amp Setting | Breaker | Copper (75°C) | Aluminum (75°C) | Ground (Cu) |
|---|---|---|---|---|
| 48A (max) | 60A | #6 | #4 | #10 |
| 40A | 50A | #8 | #6 | #10 |
| 32A | 40A | #8 | #8 | #10 |
| 24A | 30A | #10 | #8 | #10 |
| 16A | 20A | #12 | #10 | #12 |
Wire at the 75°C column of NEC Table 310.16 (the Wall Connector's terminals are 75°C-rated). NM-B cable uses the 60°C column; at the 48A setting that means #4 copper. Continuous-load sizing per NEC 625.41; ground per NEC 250.122.
Your Exact Run: Wire, Panel, and Parts
Enter your run length, conductor material, and panel to get the exact wire, voltage drop, panel-capacity check, and a parts list. Set the charger to 48A for a full-output Wall Connector install.
Frequently Asked Questions
What size breaker do I need for a Tesla Wall Connector?
At its maximum 48A output, a Tesla Wall Connector needs a 60A double-pole breaker. EV charging is a continuous load, so the breaker is rated at 125% of output (48 × 1.25 = 60A) per NEC 625.41. The Wall Connector is field-adjustable, so if you install it on a smaller breaker you commission it to a lower amp setting to match: 50A breaker = 40A setting, 40A breaker = 32A, 30A breaker = 24A, 20A breaker = 16A.
What wire size for a Tesla Wall Connector?
At the full 48A setting on a 60A circuit, use #6 copper (or #4 aluminum) at the 75°C column of NEC Table 310.16, which is correct because the Wall Connector's terminals are 75°C-rated. If the run uses NM-B cable, the 60°C column applies and you need #4 copper. Match the wire to your chosen amp setting using the table above, and check voltage drop on runs over about 100 feet.
Does a Tesla Wall Connector need a GFCI breaker?
No. The Tesla Wall Connector is hardwired and has built-in CCID/GFCI ground-fault protection, which satisfies NEC 625.54. Installing it on a GFCI breaker as well causes nuisance tripping and is not required. GFCI breakers are for cord-and-plug (NEMA 14-50) chargers, not hardwired units.
Can I put a Tesla Wall Connector on a 60 amp breaker?
Yes, that is the standard full-output install: a 60A breaker with #6 copper lets the Wall Connector run at its full 48A (11.5 kW). You then set the charger's amp limit to 48A during commissioning so it never exceeds what the 60A circuit allows.
Do I need a dedicated circuit for a Tesla Wall Connector?
Yes. The Wall Connector must be on its own dedicated branch circuit that serves no other load (NEC 625.40). It cannot share a circuit with outlets, lights, or another charger unless the two are coordinated by a listed load-management system.
Related EV References
48 Amp EV Charger Wire Size
The full spec for any 48A charger on a 60A circuit, not just Tesla.
Will My Panel Handle It?
Load calculation to confirm your panel has room for a 48A charger.
EV Charger Wire Size Chart
Every charger amperage 16A to 80A with wire, breaker, and NEMA plug.
EV Charger Calculator
Wire, breaker, panel, and GFCI for any EV charger install per NEC 625.