Template · EV chargers

Two chargers with power sharing single line diagram

A 100A EV load centre feeds two chargers that share a group current limit. Use this for two chargers at one home or small site where the feeder cannot carry both at full output. The chargers share a group current limit, so together they never draw more than the feeder allows.

A free template with typical ratings, conductor callouts and general notes. Open it, change what differs on your job, fill in the title block and export a PDF.

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Two chargers with power sharing. 12 devices on an 11 × 17 in sheet with a title block and notes column.

What the reviewer checks on this drawing

The reviewer looks for the group limit (80A on the 100A feeder), where that setting is recorded, and the label on the load centre.

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
Circuit breaker	Existing	Branch breakers
Load	Existing loads
Circuit breaker	100A 2P	Feeder
Panel	EV load centre	100A MLO · 120/240V	3 #3 Cu + #8 G
Circuit breaker	60A 2P	EVSE 1
EV charger	EVSE 1	48A max
Circuit breaker	60A 2P	EVSE 2
EV charger	EVSE 2	48A max

Notes on the sheet

Chargers configured for power sharing with a combined limit of 80A (80% of the 100A feeder).
Record the group limit setting on the commissioning sheet and label the load centre.

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.