What size generator do I need for 100 amp service?
Table of Contents
8-12 kW
If you have 100 Amp service panel, use a 8-12 kW GenSet (use larger if you have air conditioning). If you have a 200 Amp service panel, use a 15-20 kW GenSet (again use the larger size if you have air conditioning or large well pump).
What cable do you use for a generator?
You simply select a power cord that matches the most powerful outlet on your generator. So, if you have a 50-amp outlet, you’ll need a 50-amp power cord. If you have a 20-amp outlet, you’ll need a 20-amp cord. Choosing a lower-amp cord will result in wasted power potential and possible damage to your equipment.
What gauge extension cord do I need for a generator?
Make the right choice for your generator for the uses that you plan for it. Most importantly, make sure that you have the right gauge for what you plant to run, AND sufficient length. You’ll want at least 25 feet, but can’t go wrong with 75 feet to 100 feet as long as the gauge is 10awg.

How many amps does a 100kw generator produce?
GENERATOR AMP RATINGS – THREE PHASE EXTENDED
kVA | kW | 4160 |
---|---|---|
80 | 65 | 11.3 |
88 | 70 | 12.2 |
94 | 75 | 13.0 |
100 | 80 | 13.9 |
Do generators need special extension cords?

An extension cord is essential to connect electronic appliances because they can’t be plugged directly into the generator outlet. These cords come in different lengths and gauges, but many are not compatible with portable generators.
Can I backfeed my house with a generator through my dryer plug?
Backfeeding is a dangerous and possibly illegal way to power your home by connecting your generator to an appliance outlet (like a dryer outlet) and allowing electrical power to flow in reverse.
How long can a generator power cord be?
Generac offers a variety of extension cords designed specifically for generator use. These cords are 10 or 30 feet long and can be used for up to 7500 watts. They are 30 amps and stay flexible even in subzero temperatures. They work with an L14-30 plug and connector, or a (4) 5-20 connector.