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Electrical Outlet Types


As a homeowner in North Providence, Rhode Island (zip code 02904), you know the importance of reliable and safe electricity in your daily life. From powering your appliances, lighting your home, to keeping your devices charged, electricity plays a vital role in your day-to-day routines. That’s why understanding the different types of electrical outlets is crucial to ensure your home is equipped with the proper outlets for your electrical needs.

B&K Electric, a family-owned and operated electrical business based in Warwick, RI, has been proudly serving the residents of Cranston, Warwick, and all of Rhode Island for over seventeen years. Specializing in electrical repair, panel maintenance, and installation, B&K Electric is your go-to electrician for all your home and business needs in the Warwick and greater Providence area.

With our extensive knowledge and experience in the field, we have put together this guide to help you understand the different types of electrical outlets and their uses. So, let’s dive in and find the right outlets for your home.

Understanding the basics: voltage and amperage

Before we dive into the different types of outlets, it’s essential to understand the basics of voltage and amperage. In simple terms, voltage refers to the amount of electricity flowing through the circuit, while amperage measures the strength of the electrical current. A standard outlet in the US operates at 120 volts and 15-20 amps. Understanding these terms will help you choose the right outlet for your specific needs and ensure the safety of your electrical system.

Types of outlets commonly used in homes

1. Standard outlets (Type A)

The most common type of outlet found in US homes is the Type A outlet, also known as a U.S. standard outlet. It features two vertical slots for the plug prongs and a circular grounding pin beneath the slots. These outlets are used for most small appliances and electronics, such as lamps, TVs, and phone chargers. They operate at 120 volts and 15 amps, making them suitable for low-power devices.

2. Grounded outlets (Type B)

Type B outlets are similar to Type A outlets but with an added grounding pin above the two slots. This third hole is used for safety purposes, directing excess electrical current into the ground. These outlets are suitable for appliances and devices that require more power, such as refrigerators, washing machines, and heavy-duty power tools. They operate at 120 volts and 15-20 amps.

3. GFCI outlets (Type A, B)

Ground Fault Circuit Interrupter (GFCI) outlets are often found in areas of the home where water is present, such as kitchens, bathrooms, and outdoor outlets. They feature two buttons- Test and Reset- on the face of the outlet, and they automatically shut off the power if they sense a ground fault or imbalance in the electrical current. They come in both Type A and Type B versions, with the latter being more common in newer homes.

4. AFCI outlets (Type A, B)

Arc Fault Circuit Interrupter (AFCI) outlets are similar to GFCI outlets in that they sense and prevent electrical fires caused by arcing. Unlike GFCI outlets which tend to trip when a GFCI circuit overcharge is detected, AFCI outlets monitor the electrical current for any signs of hazardous arcing. They come in both Type A and Type B versions, with the latter being more common in newer homes.

5. USB outlets (Type A, B)

With the increasing demand for USB-compatible devices, USB outlets have become a convenient addition to many homes. They feature two standard outlets and one or more USB ports, eliminating the need for bulky adapters when charging phones, tablets, and other devices. They come in both Type A and Type B versions, with the latter being more common in newer homes.

6. Twist-lock outlets (Type L)

Twist-lock outlets, also known as Type L outlets, are commonly used in larger household appliances, such as air conditioners, dryers, and electric stoves. They operate at 240 volts and 30 amps, making them suitable for high-power devices. These outlets feature a circular grounding pin and three vertical slots arranged in a rotating pattern. A compatible plug must be inserted and twisted to secure it in place and activate the electrical connection.

Proper maintenance and upgrades to electrical outlets

As a homeowner, it’s essential to ensure that your electrical outlets are regularly inspected and maintained to prevent any potential hazards. Our team at B&K Electric specializes in electrical panel maintenance and upgrades to ensure your home is up to code and equipped with safe and efficient outlets for your needs.

In addition to regular maintenance, it’s also necessary to upgrade your outlets when necessary. Outdated outlets can be a fire hazard, and as our homes become more reliant on technology, older outlets may not be able to accommodate the increased demand for power. Upgrading to newer outlets, such as GFCI or AFCI outlets, not only ensures safety but also improves the functionality and convenience of your home.

Trust B&K Electric for all your electrical needs

When it comes to the safety and efficiency of your home’s electrical system, trust the experts at B&K Electric. Our family-owned and operated business is dedicated to providing quality and reliable electrical services to the residents of Warwick and the greater Providence area. With over seventeen years of experience, we pride ourselves on our commitment to community and customer service.


Electrical outlet types,

Outlet safety,

Electrical upgrades.