Level 2 charger from main panel single line diagram
Dedicated 60A circuit to a hardwired 48A charger. Use this for the simplest Level 2 install: one hardwired charger on its own breaker in a main panel that has the capacity for it. If the load calculation does not leave room for 48A of continuous load, start from the load-management drawing instead.
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What the reviewer checks on this drawing
The reviewer checks the 60A breaker against the 48A charger (125%), the branch conductor size, and that a service load calculation supports the added load.
What the drawing shows
Every device on the sheet, in the order power reaches it.
| Symbol | Label | Rating or detail | Conductors feeding it |
|---|---|---|---|
| Utility source | Utility service | 120/240V 1φ 3W | |
| Meter | Utility meter | 200A socket | Service conductors, per utility |
| Circuit breaker | 200A 2P | Main breaker | |
| Panel | Main panel | 200A bus · 120/240V | |
| Ground | Grounding electrode system | ||
| Circuit breaker | Existing | Branch breakers | |
| Load | Existing loads | ||
| Circuit breaker | 60A 2P | New | |
| EV charger | Level 2 EVSE | 48A continuous, 11.5 kW · hardwired | 2 #6 Cu THHN + #10 G, 3/4" EMT |
Notes on the sheet
- EVSE is a continuous load: 48A × 125% = 60A branch circuit.
- Service load calculation to confirm capacity for the added EVSE load.
- EVSE to be listed and installed per manufacturer instructions.
Diagram is schematic and not to scale. Field-verify existing equipment ratings. Ratings and conductor sizes shown are typical. Confirm against the adopted code, the equipment listing and a load calculation before installation. Code references are to the 2023 NEC and the 2024 Canadian Electrical Code: see references and editions.
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