If your power goes out unexpectedly often, you may want to use your portable generators as a backup which needs a transfer switch to connect.
Here a common question is, “how to connect portable generator to house without transfer switch?”
It’s easy to connect the generator to the house with an extension cord instead of a transfer switch. You have to just know the proper way.
In this article, I will make you learn the process of connecting a portable generator to a house without a transfer switch.
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Different Ways Of Connecting Portable Generator To Houses Without Transfer Switch
Connect Via Power Inverter
The quickest and least complicated method is to use a power inverter to link the generator to the home.
The inverter converts the direct current (DC) from the generator into alternating current (AC), which is suitable for use in homes.
It is necessary to configure the inverter in the transfer switch for it to function.
Power outages necessitate switching the inverter’s transfer switch to the generator and turning it on.
If you have a DC power source, you can use an inverter to make it usable with standard household appliances.
An inverter’s safety features include an auto-disconnect from the backup generator once utility power is restored.
However, when the electricity is restored, you must return the switch to the “auto” or “normal” position lest the generator continues to run inefficiently.
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Connect Through Breaker Box
Another reliable and inexpensive option is to make the connection at the circuit breaker box.
A separate breaker box and wire can be used to link the generator to the mains.
The main breaker can then be used to cut power to the generator
Wiring To Main Electrical Panel
Direct wiring of a generator to a home’s main electrical panel is an alternative to using a transfer switch. It is a risky approach, so it is not suggested.
Through Transfer Switch
The best option is to install a transfer switch to link the generator to the home’s electrical system.
It’s the conduit that runs from the generator to the main switchboard.
Using A Relay In The Wiring
Connecting a generator to the home’s main electrical panel also requires the use of a relay.
The power to the appliance is cut off when it’s needed, saving energy and money.
If you connect it, you can set it to turn on and off at predetermined times.
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Alternative Methods to Transfer Switches
When it comes to transferring power from a generator to your home, transfer switches are the most common solution.
However, there are alternative methods that can be used to achieve the same result. In this section, we will explore three alternative methods: interlock kits, breaker-panel backfeeds, and generator sub-panels.
Interlock Kits
An interlock kit is a device that is installed in your electrical panel and allows you to safely connect a portable generator to your home’s electrical system.
The kit works by preventing the main breaker and the generator breaker from being turned on at the same time, which could cause damage to your home’s electrical system. Interlock kits are relatively easy to install and are less expensive than transfer switches.
Advantages:
- Interlock kits are less expensive than transfer switches.
- They are relatively easy to install.
- They allow you to safely connect a portable generator to your home’s electrical system.
Disadvantages:
- Interlock kits require manual operation.
- They do not provide the same level of safety as transfer switches.
- They may not be suitable for all types of electrical panels.
Breaker-Panel Backfeeds
A breaker-panel backfeed is another alternative method for transferring power from a generator to your home. This method involves plugging the generator into an outlet that is connected to a circuit breaker in your electrical panel.
The circuit breaker is then turned off, and the generator is turned on. This allows power from the generator to flow through the circuit breaker and into your home’s electrical system.
Advantages:
- Breaker-panel backfeeds are less expensive than transfer switches.
- They are relatively easy to install.
- They allow you to safely connect a portable generator to your home’s electrical system.
Disadvantages:
- Breaker-panel backfeeds require manual operation.
- They do not provide the same level of safety as transfer switches.
- They may not be suitable for all types of electrical panels.
Generator Sub-Panels
A generator sub-panel is a separate electrical panel that is installed next to your main electrical panel. The sub-panel is connected to your main panel with a transfer switch, and it allows you to safely connect a portable generator to your home’s electrical system.
The sub-panel is designed to handle the power output of the generator and can be used to power specific circuits in your home.
Advantages:
- Generator sub-panels provide a high level of safety.
- They allow you to safely connect a portable generator to your home’s electrical system.
- They can be used to power specific circuits in your home.
Disadvantages:
- Generator sub-panels are more expensive than interlock kits and breaker-panel backfeeds.
- They require professional installation.
- They may not be suitable for all types of electrical panels.
How To Connect Portable Generator To House Without Transfer Switch?
Tools You Need
Interlock Kit
Interlock kits are cheaper than transfer switches. An interlock kit is more effective.
It must match your generator’s model and specifications to be useful. Ask the electrician if the interlock meets building and electrical requirements.
During a power outage, plug the generator into the same outlet. Since you’re using an interlock, connect the outside outlet to the old circuit panel, not the transfer switch.
Metal brackets on control panels hold the interlock kit. When installed, it prevents turning off the generator’s main cutoff switch.
The interlock resets when the generator stops. So it works and only redirects electricity.
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Breaker
Choose a breaker for your generator and home. Most homes need a 30-amp double-pole breaker.
If the existing breaker panel has enough empty spaces, no new breaker is needed. Most installations need new breakers.
Safety Equipment’s
As the task involves electric lines, you should prepare safety gear.
Voltage sticks, steel-capped work boots, protective eyewear, and work gloves are required. If an electrician does the job, he’ll have these things.
Plug
You’ll need a large round plug for interlocking your generator. Also, check the generator’s amperage and plug.
Cables
To make a safe connection, you need electrical wires. Keep different-colored wires.
Extra Equipment
Safety equipment and process equipment are both needed. Bring drills, screwdrivers, wrenches, and pliers before starting work.
Now we will describe the process step by step,
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Create A Location For The Outlet Utility Box
Create an outlet for the generator in the desired location.
Using your oscillating tool for wood and drywall, create a rectangular hole in the wall that will accommodate the outlet.
If you have a wall made of concrete cement, you can also use a drill.
Drill A Hole For Your Generator Cables To The Outlet
Create a hole with your drill to run your wires from the exterior of your home. Ensure that it is larger than the expected wire diameter.
Thus, you can avoid causing damage to the wires when installing them within your outlet kit.
Install a Waterproof Box Outside Of Your Wall
On the exterior wall, mount your waterproof box. This box is intended to safeguard your end plug from any potential damage.
For covering the end plug, any safety box, such as this Sigma Electric Box, can be used.
Nevertheless, you may need to locate a larger safety box to accommodate your wires.
Connect The Wire To The Outlet
Insert the other end of the wires with a plug outside your home to connect them to your outlet kit. After inserting the line, the outlet kit can be assembled inside.
When the outlet and wire are assembled, the exterior and interior can be sealed.
seal a hole with a sealant. This is required to waterproof your installation.
Connect Generator To Electrical Outlet And Test It
To test this plug-type connection, power up your generator, connect the extension to the generator’s inlet plug and turn on the generator’s power.
Connect your power consumption tester and appliances with compatible power ratings to your generator in order to determine how many watts it produces.
FAQs on How To Connect Portable Generator To House Without Transfer Switch
Is It Against The Law To Operate A Generator Without A Transfer Switch?
It is against the law to connect a generator directly to the electrical panel without installing a transfer switch first.
The National Electrical Code requires generators to be connected via a transfer switch, so you will not be in violation of any local building codes by doing so.
During emergencies or repairs, some homeowners have illegally rigged up their own power supply, but it is essential to understand that this is illegal and dangerous.
How Is A Generator Connected Directly To A Breaker Box?
Since you will be connecting your generator to the electrical panel, this method is unsafe.
This poses a safety risk for anyone who works on the system in the future, and if something goes wrong with the house wiring or generator power supply, it could result in serious injury or even death.
How Exactly Does An Interlock Kit Operate While Connecting A Generator Without Transfer Switch?
The interlocking kit functions by disconnecting the control panel from the electrical system of your home.
When installed and wired to the generator, it disables the primary power supply.
Now, your generator will serve as the primary source of electrical power instead of the utility.
It is directly mounted above the control panel.
When installed, it mechanically locks the circuit breakers into a predetermined position to ensure a safe power supply.
Final Thoughts
Now you know how to connect a portable generator to your house without transfer switch.
This method of connecting a generator to a home without an installed transfer switch is convenient, particularly if only a small electrical generator is required.
You may use any safety box for this application, especially if you intend to use extension cords.
