Considerations in Installing a Portable Natural Gas or Tri-Fuel Generator and Parts List
[This information is meant to give the reader a general idea of the installation process and parts needed as well as the project cost, consult a licensed professional to design and install your generator system.]
After doing the research and reading reviews and specifications on the different generators available, I settled on a portable Tri-fuel generator rated at 6kW made by Winco. Tri-fuel means that it can run on gasoline, natural gas (CNG), and propane (LP). I plan on using it connected to the natural gas supply from my house. Here is a similar product rated for 10kW by Powerland:
I figure I can use gasoline if there is a problem with the natural gas supply. I recommend keeping a few gas containers handy, they are hard to find during an emergency.
I already have a hook-up for my outdoor bar-b-q and I planned on using that for the generator. Unfortunately, that is not possible. The generator requires more gas flow than a bar-b-q. A natural gas line for a medium power generator must be 3/4" or 1" diameter (check the owners manual for actual requirements). If you use a smaller line or the pressure is too low, the generator will not work properly. Check with a licensed professional to make sure the gas lines in your home are rated for the generator you plan on using. Example of pipe:
It is necessary to have a licensed plumber install the natural gas line for your generator. Since a portable generator is not meant to be left outdoors, a quick disconnect fitting is essential so that you can quickly connect (and disconnect) the generator in case of emergency. The gas line should also have a shut off valve right near the hook-up so that you can cut the fuel quickly if necessary. You will also need flexible gas line to connect the generator. Make sure all of the parts are designed for outdoor use. This is what a gas valve looks like:
Rather than running extension cords from the generator, it is best to wire the generator into your house's electrical system. This should always be done in compliance with local building codes and with permits. For a medium power generator, a sub-panel is needed that your electrician can move a few essential circuits to. This will allow the generator to power limited parts of your home safely. You will also need a manual transfer switch that will allow you to direct the electricity from the generator to the sub-panel when needed and switch it back to the power company service at all other times. This all must be installed by a licensed electrician. Transfer switches come in different power ratings and support different number of circuits. Figure out how many circuits you want to power and check your generator rating before purchasing. A 30 amp 6-circuit kit and a 50 amp 10-circuit model is shown below.
An outdoor receptacle (inlet box) is necessary to plug the generator into so that the power can be directed into the house. Make sure it is rated for your generator, 30 amp and 50 amp models shown below.
You will also need a generator power cord rated for your generator. 30 amp and 50 amp cords shown below.
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