Template · EV chargers

Level 2 charger with service upgrade to 200A single line diagram

A 100A service replaced with 200A to make room for a 48A charger. Use this when the load calculation says the house cannot take a charger on its 100A service and the owner wants the service replaced: a new 200A meter socket, service entrance and panel, with the charger on a 60A breaker.

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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Level 2 charger with service upgrade to 200A single line diagram: A 100A service replaced with 200A to make room for a 48A charger. — Level 2 charger with service upgrade to 200A. 10 devices on an 11 × 17 in sheet with a title block and notes column.

What the reviewer checks on this drawing

The reviewer checks the load calculation for the new service with the charger in it, the service entrance conductor size, the grounding electrode conductor, surge protection at the new service equipment, and the 60A breaker against the 48A charger.

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	Meter socket	200A · utility approved	Service drop, per utility
Circuit breaker	200A 2P	Main breaker	Service entrance, 2/0 Cu or 4/0 Al
Panel	Main panel	200A bus · 40 spaces
Ground	Grounding electrode system	#4 Cu GEC
Surge protective device	SPD	Type 1 or 2
Circuit breaker	Branch breakers
To (continues off sheet)	To house circuits	Re-terminated
Circuit breaker	60A 2P	EVSE
EV charger	Level 2 EVSE	48A continuous, 11.5 kW · hardwired	2 #6 Cu THHN + #10 G, 3/4" EMT

Notes on the sheet

The 100A service, meter base and panel now on site are removed. The house circuits are re-terminated in the new panel.
EVSE is a continuous load: 48A × 125% = 60A branch circuit.
Load calculation for the dwelling with the EVSE added, submitted with this drawing, supports the 200A service (NEC 220.82; CEC Rule 8-200).
Service entrance conductor size shown per NEC 310.12; size per the adopted code.
Surge protective device at the service equipment, Type 1 or Type 2 (NEC 230.67 for dwelling services).
The 2020 and later NEC also ask for an emergency disconnect outdoors at a dwelling (230.85). Where the panel is indoors, start from the drawing with the outdoor emergency disconnect and add the charger to it.
Coordinate the disconnect and reconnect with the utility.

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.