Service upgrade with outdoor emergency disconnect single line diagram
New meter socket and outdoor service disconnect; the panel inside stays and becomes a subpanel.
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.
Open this template in the editor Download the SVG
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 | Emergency disconnect, service rated, outdoor | Service entrance, 2/0 Cu or 4/0 Al |
| Grounding electrode | Ground rods | 2 rods, 6 ft apart, #6 Cu GEC | |
| Circuit breaker | 200A 2P | Main breaker | 3 #2/0 Cu + #6 G, 2" PVC |
| Panel | Main panel | 200A bus · neutrals isolated | |
| Circuit breaker | Branch breakers | ||
| To (continues off sheet) | To house loads | ||
| Surge protective device | SPD | Type 1 or 2 |
Notes on the sheet
- Outdoor disconnect is the service disconnect, marked "EMERGENCY DISCONNECT, SERVICE DISCONNECT" (NEC 230.85).
- Main panel becomes a subpanel: four-wire feeder, neutrals isolated, bonding screw removed. Grounding electrode conductor and main bonding jumper move to the outdoor disconnect.
- Service and feeder conductors for a 200A dwelling: 200A × 83% = 166A, so 2/0 Cu (175A) or 4/0 Al (180A) per NEC 310.12.
- Surge protective device at the panel, Type 1 or Type 2 (NEC 230.67).
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.
Related service and panel drawings
Service and main panel upgrade to 200A
New meter socket, service entrance and 200A panel with surge protection.
ServiceView drawing
Panel upgrade with grounding system replacement
New panel with rods, water bond, intersystem bonding and surge protection.
ServiceView drawing
Subpanel addition
100A four-wire feeder to a new subpanel.
ServiceView drawing
Feeder to detached garage or ADU
Underground feeder, building disconnect and local grounding electrode.
ServiceView drawingSee all service and panel single line diagrams, or all 52 templates.
Start from this drawing
Free, in the browser, no account. Start from a template or describe the job in plain words, edit the drawing and export a PDF.