Project capacity guide
Do you need 200 amps for a home workshop?
Electrical-capacity planning for a home workshop at home.
Short answer
A home workshop does not automatically require 200A service. The decision depends on largest tools, simultaneous use, motors, welders, detached-building supply and future equipment.
Key takeaways
01Start with equipment specifications and the home’s current demand.
02Panel space does not prove service capacity.
03The project should be assessed before equipment is purchased or installation is booked.
What determines capacity
The contractor needs to review largest tools, simultaneous use, motors, welders, detached-building supply and future equipment. The applicable calculation and local permit rules determine the acceptable design.
Alternatives to a service increase
a dedicated feeder or different operating plan may be part of the solution. Any alternative still needs to be approved for the equipment, installation and jurisdiction.
What to prepare
Bring the equipment model or expected rating, service-size clues, existing major loads, panel-space information and future project plans.
Field notes / decision evidence
List tools that may run together
A workshop plan should separate the largest single machine from realistic simultaneous use and building-supply design.
Tool schedule
List motors, welders, dust collection, heating and any future machines with their nameplate information.
Operating pattern
Describe which tools operate at once. A design based only on the largest nameplate can miss the actual workflow.
Feeder or service
For a detached shop, ask whether a feeder from the home or separate service is feasible, and compare routing, utility and permit responsibilities.
Illustrative scenarioExample only: a workshop with one intermittently used tool is different from one running a welder, compressor and electric heater at the same time.
Decision table
What the evidence changes
- Automatic 200A requirement
- No
- Decision evidence
- Applicable load calculation + equipment information
- Possible paths
- Existing service, distribution change, management or service upgrade
Typical project sequence
From question to documented work
- 01Choose equipment concept
- 02Check existing service and loads
- 03Complete calculation
- 04Confirm permit / utility path
- 05Install and inspect
Sequence and responsibilities vary by jurisdiction, utility and scope.
Evidence
Sources and verification
Published by the 200AmpPanel.ca Research Team, a HAUSE specialist property. Updated 2026-09-29.
Questions
Frequently asked
Can a 100A home support a home workshop?
Sometimes. The service size alone cannot answer; existing demand and project design matter.
What should I do next?
Use the Capacity Check to organize what you know, then have a qualified electrical contractor complete the assessment required for the property and jurisdiction.
Your next step
Bring the right facts to the first conversation.
Record the visible service clue, planned equipment and any relevant documents. The free brief organizes your questions; a qualified person verifies capacity and scope.