How To Determine When To Use Arc Fault Circuit Interrupters (Af ...

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  • AFCI devices (and GFCI devices for that matter) that constantly trip or trip soon after resetting indicate a defective AFCI (or GFCI) device or a potentially serious problem in the dwelling's wiring. If replacing the device does not solve to tripping issue, call an electrician as soon as possible to locate and remove the fault source. Left unresolved, fire could eventually result. Simply removing or bypassing the required AFCI or GFCI protection is generally unacceptable. Thanks Helpful 1 Not Helpful 0
  • A GFCI device on the other hand, is a high-speed, precision balancing device. In most circuits, the amount of current flowing on the black wire to a device should flow back on the white wire. If there is a difference of as little as .005 (5 thousandths) amps between the hot and neutral wire, this current is presumed to be "leaking" through the device case, handle, or in the case of a 3-wire cord-connected appliance or tool, safety ground. Since it is possible that a user of the device is in contact with this leak current, the GFCI opens the circuit within a fraction of a second from when the leak current is first detected and it stays open until manually reset. This helps to prevent serious burns or injury to the user. The AFCI is designed to prevent loss of property and life due to fire, while the GFCI is designed to prevent shock or serious injury to individuals. It should evident why both types of protection are highly desirable. Thanks Helpful 1 Not Helpful 0
  • AFCI and GFCI are two similar looking devices with completely different purposes and are not interchangeable. An AFCI detects arcing in circuits. Pinched conductors, broken or loose connections, etc. that can contribute to the type of arcing that can result in fires, have very specific arcing characteristics or "signatures". The arcing seen in many motor operated devices (such as a drill or vacuum cleaner), or those seen when a fluorescent light starts, should not trip an AFCI device, as this type of arc does not have the signature (duration and amplitude) type that causes fires. Thanks Helpful 0 Not Helpful 0
  • Installing new wiring, circuits, etc. will almost always require a wiring permit and inspection, if not also a licensed electrician. Do not skip this important step of electrical work. Thanks Helpful 0 Not Helpful 0

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