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How to Wire a GFCI Outlet with Multiple Outlets [Step-by-Step Guidelines]

Working with a GFCI outlet is very tricky. This kind of outlet is very efficient and versatile but also hard and risky to install. Especially, when you are trying to wire it with several outlets. You might fail more times than you think.

If you want to successfully wire a GFCI outlet, you need proper guidance and learning. Without that, you’re just inviting electrical danger.

How to wire a GFCI outlet with multiple outlets?

The GFCI can be wired with multiple outlets. You have to use 2 wire cables, multiple outlets, and a GFCI for that. Use single GFCI as the source. Then connect the rest outlets using the same terminals. 

If that wasn’t enough help, I’ve got you covered. I have prepared a detailed article to help you out.

Come on, let’s learn about it more!

How To Wire A GFCI Outlet With Multiple Outlets: 4 Steps-to-Follow

A GFCI outlet stands for ground fault circuit interrupter. They are usually placed on highly moisturized surfaces. If you have to connect multiple outlets together, then this is your standard outlet type. 

I understand you are skeptical and don’t know the answer to why replace your traditional outlets with GFCI. The main reason would be the safety that comes with GFCI outlets. 

Unlike traditional outlets, they are water resilient. So, they can be kept near high moisturized areas like the washroom and kitchen. They also have this automatic reset system, which turns off the outlet in case of a minor occurrence. 

This is done so that you never have to face any electrical accidents.

Necessary tools

To install GFCI outlets, first you need to gather the necessary tools. Tools are required for faster and safer work situations. So that you don’t have to think about how to put out electrical fires.

I have mentioned the tools and why you’ll need them for a better understanding. And also for you to pick any other alternative you may have at home or don’t want to waste money buying.


Pliers are needed during any wire-work. As GFCI outlets require a lot of wiring, we highly recommend you to get one of these. 

These are some of my absolute favorites of all times pliers-

Product 1
Product 2


A handyman’s best friend is a screwdriver. Outlets need to be opened and replaced for this process. And a screwdriver is the boss for that job. Grab some extra screws and bolts as well when you are at it.

A GFCI outlet (obviously)

And last but not the least, a GFCI outlet is needed. This is the star of the show and will decide the end result of all the hard work.


This instrument decides the polarity of the wires. Though GFCI outlets are more efficient, a little wiring issue will cause chaos. An electrical shock can become a lifetime regret. So to double-check power is necessary.

As now I have cleared up the tool requirement, let’s start with the necessary steps. Each step should be followed one after another respectively. Here it goes-

Step 1: Turn Off All the Power Supply

First thing first, turn off every supply of electricity from the outlet. This is necessary for the protection of all kinds of hazardous situations. 

Start by turning off the main switch. You can cut off the electricity of the house but it might be a hassle. Instead, turn off the lights of the specific room you will be working on.

Step 2: Test the Open Socket For Power

Now the open socket might be electrocuted already. Even if the electricity of the whole house is off, there’s a chance your outlet is still electrocuted. 

To test if any power is left in them, you can use the tester to inspect further. If you see every wire out of the open socket is power-free, proceed with caution.

Step 3: Wire Outlets in a Parallel Connection

Now before you begin, make sure you’ve cleared out all sorts of gfci wiring problems. Once you’re done with that, start by identifying the black or hot wire that enters the electrical box from the circuit. Then, connect this wire to the “wire nut” or the connector with a twist.

After that, take the black or hot wire that is exiting the electrical box to the next electrical box. It might be any other device or outlet that you want to connect to the first one in parallel. Make careful to use the same twist-on connector as before.

To provide the most protection from ground faults, it’s always better to wire the GFCI in parallel. But you may also connect them in a series. 

If a load is present, you may not be able to obtain correct voltage values at the other outlets of our application when using a GFCI series connection. So try to connect GFCI outlets in parallel wherever possible.

Now you may want to know the basics of wire gauge and ampacity in order to work with GFCI outlets and wiring for your better undertstanding.

Step 4: Attach The GFCI Outlet 

After you are done, attach the GFCI outlet using bolts. The placement should be proper and standard. So that there is no wire in the ground outlet.

The process itself isn’t much of a risk. It’s the safety issue that requires attention. A little mishap will cause the outlet to not work. And as it will have other outlets connected within itself, they wouldn’t work out as well. 

Final Thoughts

One GFCI outlet can control multiple outlets. Mis-wiring it will cause the entire outlet to never startup.

This is why GFCI outlets require special attention. Though they are more reliable than any other traditional outlets, they still tend to get ruined easily. 

Other than that, GFCI outlets are the best deal for your house. It provides safety along with multiple outlet control.

GFCI outlets are useful and futuristic yet tough to be wired. It requires your utmost attention and hard work. So, if you have tried our way and got somewhat good results, I am happy for you. Congratulations on your brand new outlet.


Question: Is it possible for one GFCI to control multiple outlets?

Answer: Yes, it can. One GFCI can control multiple outlets but will require extra attention.

Question: How many outlets can we connect to a GFCI?

Answer: A standard GFCI can control up to 20 amps that are drawn from any combination of receptacles. So that the built-in outlet or the additional ones can stay connected to it.

Question: Is it possible to put GFCI at the end of the run?

Answer: Yes, it is possible to put a GFCI at the end of the run. In case your objective is to protect one singular outlet, then you can put GFCI at the end of the run.


I hope with this article you’ve learned how to wire a GFCI outlet with multiple outlets. If not a pro, I hope you have learned something at the beginner level. 

You can contact your local electrician for help if you wish. You should not meddle with electrical outlets unless you are sure of your work. It’d be equally unsafe and damaging. 

Until next time. Goodbye!