Condo charger from meter with load miser single line diagram
Load management device between the unit meter and unit panel feeds the charger. Use this for a condo or apartment owner adding a charger at their parking stall, fed from their own unit meter. A load management device sits between the unit meter and the unit panel, so the charger never adds to the unit feeder’s peak.
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What the reviewer checks on this drawing
The reviewer checks that the device is listed for this use and accepted by the AHJ, the setpoint against the unit main, and that the building service calculation is unchanged. The condominium corporation’s approval of the conduit route usually goes in with the application.
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 | Building distribution | 120/208V 1φ 3W | |
| Meter | Unit meter | In meter centre | |
| Device | Load management device (EVEMS) | 100A · between meter and unit panel | |
| Panelboard | Unit panel | Existing 100A | Existing feeder |
| Circuit breaker | 40A 2P | Integral breaker | |
| EV charger | Level 2 EVSE | 32A · 6.6 kW at 208V | 2 #8 Cu + #10 G |
Notes on the sheet
- Load management device disconnects the EVSE when the unit feeder current exceeds 80% of the unit main rating.
- No change to the building service calculation where the device is listed for this use and accepted by the AHJ.
- Obtain condominium corporation approval for the conduit route to the parking stall.
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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