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Home electrification on a 200A service single line diagram

Heat pump and air handler, heat pump water heater, induction range and a managed EV charger, with no service upgrade. Use this when a house is going all electric on the 200A service it has: a heat pump with its air handler, a heat pump water heater, an induction range and an EV charger held back by an energy management system.

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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Home electrification on a 200A service single line diagram: heat pump and air handler, heat pump water heater, induction range and a managed EV charger, with no service upgrade. — Home electrification on a 200A service. 21 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 existing dwelling with the new loads in it, how the charger is counted with the energy management system, ground-fault protection where the adopted edition asks for it, and each new circuit against the nameplate of what it feeds.

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	Branch breakers
To (continues off sheet)	To house loads
Circuit breaker	15A 1P	Furnace
Load	Gas furnace
Circuit breaker	40A 2P	GFCI · heat pump
Disconnect switch	Disconnect	60A · NEMA 3R, within sight of unit	2 #8 Cu + #10 G
Device	Heat pump (HP)	MCA 28A · MOCP 40A
Circuit breaker	60A 2P	Air handler
Disconnect switch	Disconnect	60A non-fused, at air handler	2 #6 Cu + #10 G
Heater	Air handler	10 kW heat strip, 240V · 45.7A
Circuit breaker	30A 2P	Water heater
Heater	Heat pump water heater	4.5 kW · 240V	2 #10 Cu + #10 G
Circuit breaker	40A 2P	GFCI · range
Device	Induction range (RANGE)	11 kW · 240V	3 #8 Cu + #10 G
Circuit breaker	60A 2P	EVSE
Device	Energy management system (EVEMS)	60A · CTs on service conductors
EV charger	Level 2 EVSE	48A · 11.5 kW	2 #6 Cu THHN + #10 G

Notes on the sheet

Gas furnace, water heater and range are replaced with electric equipment on the 200A service already there.
Load calculation for an existing dwelling with the new loads added (NEC 220.83, or 220.87 from a year of metered demand; CEC Rule 8-200), submitted with this drawing.
The EVSE is counted at what the energy management system lets it draw (NEC 625.42 and 750.30, and 220.70 in the 2023 edition; CEC Rule 8-106). The system interrupts the charger when the service current reaches 160A, 80% of the main.
Heat pump breaker does not exceed the nameplate MOCP (40A); conductors sized from the MCA (28A). Replace both with the nameplate data of the installed unit.
Ground-fault protection on the outdoor heat pump (NEC 210.8(F), 2020 and later) and on the range (NEC 210.8(D), 2023). The 2023 edition exempted listed HVAC equipment until September 2026, local amendments often still do, and the CEC does not ask for either: confirm what is adopted.
Air handler: heat strip 10 kW ÷ 240V = 41.7A, plus 4A blower = 45.7A; × 125% = 57A, protected at 60A. It is the largest load in the calculation; where controls keep the strip and the heat pump from running together, the larger of the two is used.
Water heater 4.5 kW ÷ 240V = 18.8A; × 125% = 23.4A, protected at 30A.
Range 11 kW: 8 kW demand (NEC Table 220.55) ÷ 240V = 33A, on a 40A circuit. Where the range instructions call for 50A, use a 50A breaker on #6 Cu.

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.