Summary: This helpful generator sizing and selection guideline will help you consider the generator size for the best value when selecting your home generator.
Generator Guidelines for Sizing a Home Generator System
Use this generator sizing guide to help select the right home generator.
There are a wide variety of home generators to choose from so here are a few guidelines to follow while your looking for the best value. Select a brand that has the features you need at a price you can afford.
Look for pre-wired, pre-packaged solutions, that extend your value even further by making the generator system the absolute easiest to install.
Make sure the generator has an industrial grade engine that is specifically designed for the harsh rigors of standby power, with easy motor starting capability and a enclosure design to protect your generator and your investment.
Generator Sizing Table
Non-Motor Loads - General Residential *
Electrical Circuit / Device Description
kW
120V-1P
240V-1P
Electric Heat (per 1000 ft home size)
12
NA
50
Heat Pump Elements (per 1000 ft home size)
7
NA
29
Electric Dryer
5.5
NA
29
Hot Tub
10
NA
50
Electric Range (Oven)
5
NA
21
Stovetop Burners (each)
1.5
NA
6
General Receptacles (per 1000 ft home size)
1
8.3
NA
General Lighting (per 1000 ft home size)
0.75
6.3
NA
Blow Dryer
1.25
10.4
NA
Dishwasher
1.5
12.5
NA
Microwave
1
8.3
NA
Toaster
1
8.3
NA
*Guidelines Only. Check nameplate specifications for actual electrical circuit requirements.
Generator Sizing Table
Motor Loads - General Residential
Perfect for Homeowners, the Handyman, and Electricians Includes: Complete with Practical Hands On Wiring Instructions Installing Electrical Wiring for Generator Panels and Transfer Switches Loaded with On the Job Electrical Pictures and Wiring Diagrams Great Help for Wiring a Generator and Transfer Switch ....and much more. » Click here to learn more about Home Electric Wiring
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Electrical Project Skill Level:
Licensed Electrical Contractor, Not Recommended for Homeowners.
Electrical Tools Required:
Electricians pouch of hand tools and the various power tools necessary for installing the generator and transfer switch. Estimated Time:
Depends on the type and size of the generator and transfer switch and the available access to the project area. Electrical Safety:
Any existing electrical wiring within the immediate area that may interfere with the installation of the transfer switch may need to be relocated if necessary.
Electrical Wiring Parts and Materials:
Electrical parts and materials for generator wiring projects should be approved for the specific project and compliant with local and national electrical codes.
Electrical Codes and Inspections:
Installing a generator and transfer switch must be well thought out and performed with a permit with all work being inspected.
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