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How To Connect Generator To House Without Transfer Switch?

Depending on the location where you live, you may need to use backup power at your home from time to time. Most of the time you’ll need a generator than other things. If the area where you’re living experiences frequent loss of electricity, then the need for a generator is undeniable.

To make it more convenient, installing a generator in the house without a transfer switch is very important. A generator transfer switch is an automatic switch that is particularly used for switching power from the utility company to the generator seamlessly and automatically. It will ensure the safety of the appliance from damage by starting and shutting down while the power supply will not be interrupted.

A transfer switch is a perfect safety device required for generator operation. It acts just like a circuit breaker.  It is installed in the generator so that the main power supply to the house turns off when the generator is ready to go.

In this article, we’re going to describe a detailed guide on how to connect a generator to a house without a transfer switch.

Is There Any Need For A Transfer Switch For The Generator?

Technically, it doesn’t seem necessary to use a transfer switch but there are a number of reasons recommended by professionals and experts to install one in your home when connecting the generator. If you’re a starter then this is the one safest way to connect a generator to a house.

You can even use extension wires for this purpose, but that can cause several issues by increasing the risk of fire or electrocution. It is also required by the national electric code. It is stated by National Electric Code to install a transfer switch when using a generator to power your home appliances.

How To Connect Generator To House Without Transfer Switch? – Step By Step Guide

It isn’t a straightforward process to connect a generator without a transfer switch. As per safety measures, it is important to install a transfer switch. It won’t be much safe if you’re going to use a generator without a transfer switch and also won’t be effective at all. But if there’s any kind of emergency, you can do it easily.

Now as you know for the whole process you are going to deal with electricity and dealing with electricity shouldn’t be taken for granted. Whatever the necessary tools are, you have to use them and you have to follow the guide properly to get the job done perfectly.

Materials Required:



A breaker will be needed for your generator. You should choose a breaker that also works well with your home specifications.

Interlock Kit:

Interlock Kit
Interlock Kit

If you have made your mind to connect a generator to your house without a transfer switch, the first thing you will need is an interlock kit. It will help you connect with that transfer switch but make sure that you get an interlock kit that works perfectly with your generator.

The kit should exactly match the version of the generator. The advantage of using an interlock kit is that they’re not very expensive and you can get them almost anywhere.



Three sets of electrical wires will be required. Dealing with electrical wires should also be taken seriously without compromising safety. Also, get wires that are multi in colors for their easy identification during work.

Gears & Tools:

Gears and tools

Right equipment and tools are needed to finish the process properly. It is important to keep everything by your side before starting the process. From drills and screwdrivers to pliers and wrenches, you’ll need everything. Other things you will need are protective gears and gloves to keep you safe against the electricity and hazards that can occur unexpectedly.

Checkout our guide about What Can a 2000 Watt Generator Run

Safety Measures

Your own safety is the first and foremost important thing. While installing this equipment, the usage of safety precautions is the first stage.  To keep yourself safe, use safety glasses or goggles as well as gloves.  

Make sure that your generator is not connected to a circuit breaker inside your fuse panel since this can result in a fire. Avoid using a male-to-male connector or connecting generator to the circuit box directly.

Find out the amount of power needed by your appliance:

A variety of appliances are needed by people to run at their homes. So, it is important to find out the amount of electricity required by each device running at your home. It is important to determine this to ensure that the power sustained by the generator is adequate.

To elaborate this, a typical microwave may use up to 1500W but a light bulb can use 150W. That is why it is important to have an idea about the amount of electricity required in your home before hooking up the generator

Examine wiring system:

Each house has a unique kind of wiring system. To find out the wiring system of your house you may need to call the local company or any authority that is responsible for supplying the electricity to your house and also inquire minutely about the electrical installation that’s been installed.

Take advice only from a trustworthy source to avoid any kind of misinformation. It can happen because each town, state, or area has unique regulations regarding wiring systems.

Find out Amperage & Plug type:

Now is the time to examine the amperage of the generator and plug type as you may be familiar with the wiring system and precautionary measures. The plug will be responsible for delivering electricity to both ends of the generator breaker. There is also an amperage marking on the breaker that will assist in adjusting the equipment when needed.

Drill a Hole:

Use a drill and start some drilling. The hole drilled will be used to connect cords from the generator to your house. The opening should be large enough to accommodate all cables inside the hole. Also, the hole should be made in an area where the generator will be far away from you. Making a hole near your bedroom will not be an ideal option as the sound produced by the generator will disturb your goodnight’s sleep.

Checkout our guide about the best 5000 watts generators

Assemble All Materials

Put all the components together by starting with the power socket on the external wall. Make sure that the electrical socket is placed at a good distance away from the opening you made inside the wall.

You will need to connect and glue the conduits after installing the power inlet for optimal safety. Then connect the input plug of your generator. Remove a single cable from the conduit box at this stage and press all of the remaining cables.

In the end, set up the breaker box in a way that all cables from the conduit block may be handled properly. Then seal the breaker box after placing the cables and switch the retainer carefully.

Check all connections properly:

It is essential to follow all precautionary measures during the installation to avoid any risk of accidental hazards that can damage you or your living place. If you have done the whole job on your own make sure to examine it by an expert or professional once to ensure maximum safety.

In case of a fire occurs even unintentionally, the insurance provider will not deny the claim owing to the minor flaws or faulty wires.

Connecting The Generator With Transfer Switch vs. Without Transfer Switch

The most significant difference between these two methods is that connecting a generator without a transfer switch is less safe than connecting it with the help of a transfer switch.  A transfer switch will be used to switch the sources of power to your house. When you switch back from your generator to a central device, the electricity from the generator shouldn’t be routed through the primary channel of the central unit.

This step is a bit critical as the electricity by the generator can be extremely dangerous if it has malfunctioned. A transfer switch will prevent any such incident. You will be more confident with it as there will be no problem created by electricity in your vicinity.

If somehow a situation occurs when immediate attention is needed, such as a power outage or electrical shortage, people wish to restore it easily as well as swiftly. That’s the reason they go for the generator to connect it without the transfer switch.

However, to do the whole process you need to prepare all needed tools including cables, interlock kit, and other essential materials. As it is a very easy and quick method, making connections without a transfer switch offers some danger to home that you must keep in mind before proceeding further.

Precautionary Measures

Here are some more safety tips for you to keep in mind to minimize any harmful risk and to ensure the safety of your whole family:

  • Never use any kind of male-to-male plugs as they can harm the whole system.
  • Try to use a generator that isn’t linked to the circuit breaker directly.
  • Without shutting off the main switch, do not attempt to make any kind of modifications.
  • An interlock kit is a must thing if you want to utilize a generator without a transfer switch. As it is the only safest way of running a generator without a transfer switch.
  • Have some knowledge about the laws by state and avoid doing anything that is prohibited by officials due to safety concerns.
  • If you aren’t sure after attaching the generator to your house without a transfer switch, it’s a smart idea to get aid from any professional to find out the job is done accurately.

As an Energy and environmental engineer, I worked in eco bottle manufacturing for the last three years. Currently, he is the leading engineer in a Lithium Iron phosphate battery manufacturing company.

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