GFCI vs. AFCI | Protection Against Electrical Fires and Shocks

ground fault circuit interrupters (GFCI) vs. arc fault circuit interrupters (AFCI) Technology has made it easier for homeowners to protect their home from electrical overloads and short circuits. While circuit breakers offer a basic level of electrical fire protection, there are two more recent products on the market that offer enhanced protection from arcing and ground-faults: GFCIs and AFCIs. Called electrical circuit interrupters, these two similarly named devices will interrupt your circuit, like your breakers do, but for different reasons. A standard breaker trips when electrical current exceeds the breaker's amperage rating. An AFCI outlet or breaker trips when it detects electrical arcing faults. A GFCI outlet or breaker protects against electric shock. Here's a breakdown of the different types of breakers (or fuses) you may find in your electrical panel: breaker panel and fuse box breakdown Source:

Arc Fault Circuit Interrupters (AFCI)

An arc fault can be caused by a variety of common electrical problems:

There are two main types of arc faults:

Parallel arcs, the most dangerous kind, occur between two different conductors, either hot and neutral, hot and ground, or neutral and ground (ex: damaged insulation). Series arcs occur along the same hot or neutral conductor, or along connections (ex: nail severs wire). An AFCI protects against arc faults, high-power discharges of electricity between two or more conductors. This discharge turns into heat, which can compromise the wire’s insulation and potentially start a fire. The AFCI breaker or receptacle detects the leaking electricity and shuts off power before it has time to cause a fire.

AFCI Essentials:

afci - arc fault interrupter facts Source: For more information on arc fault circuit interrupters, download this AFCI Infographic from Electrical Safety Foundation International (ESFI).

Ground Fault Circuit Interrupters (GFCIs)

ground fault is an unintended connection between a "hot" power source and a grounded wire, junction box, or piece of equipment. Ground faults are caused by: If your body becomes the path for the electrical current to the ground, there is a high likelihood of you getting electrocuted, burned, or shocked. A GFCI outlet or breaker helps to prevent burns, electric shock and electrocution by quickly shutting off power to the circuit if a leakage is indicated. Both of these technologies can co-exist with each other as they provide different, yet essential, safety functions. Understanding the basics of each device will help highlight their differences and how each can benefit your home’s electrical system.

GFCI Essentials:


How to Test GFCIs and AFCIs

Test your AFCIs and GFCIs every month
The steps for testing your GFCI and AFCI breakers and outlets are very similar, if not the same. Whether or not you have an AFCI/GFCI breaker or receptacle, you should see two buttons: a "test" button and a "reset" button.
  1. Make sure power is on (breaker switch should be on the "on" position).
  2. Press the "reset" button (if there is no "reset" button, skip to the next step).
  3. Press the "test" button to open the circuit.
  4. Pressing the "test" button should turn the power off and the "reset" button should pop out. If you are testing a breaker, the breaker should move to the "off" or "trip" position.
  5. Simply press the "reset" button again and your done with the test. If you are testing a breaker, turn the breaker fully off and then back on again to restore power
If pressing the "test" button doesn't turn power off, consult an electrician right away. If you notice anything else wrong, such as delayed tripping, multiple attempts to press the reset button, or any other anomaly, you may have a wiring issue or damaged circuit.

How to Test an AFCI

how to test arc fault circuit interrupter AFCI Source:

How to Test a GFCI

how to test ground fault circuit interrupter GFCI Source:

Can I Install GFCIs and AFCIs Myself?

The simple answer is no. GFCIs and AFCIs should always be installed by a qualified electrician. Portable GFCIs and AFCIs, however, don't require any tools or special installation. For more information on the differences between AFCIs and GFCIs, consult this infographic by ESFI: differences between afci and gfci Source: Arc faults and ground faults are bad unsafe and can be easily prevented with AFCI and GFCI protection devices. While a combination of both technologies is required for new residential construction, older homes should be outfitted with them as well. For more information on how AFCIs and GFCIs can benefit your home, give Hiller a call today!
Hiller Plumbing, Heating, Cooling, & Electrical provides 24-hour residential and commercial service and repair throughout Tennessee, Southern Kentucky, and Northern Alabama. Click here for our full list of locations. With our mantra, “Happy You’ll Be or the Service is Free!” we are dedicated to resolving any issue with our services within 48 hours, or your money back. Keep up with all the latest plumbing, heating, cooling, and electrical new and updates by following us on Facebook, Twitter, Google+, Instagram, LinkedIn, and Pinterest.