No announcement yet.

Gfci & Arc Fault

  • Filter
  • Time
  • Show
Clear All
new posts

  • Gfci & Arc Fault

    just some useful info

    1-888-NEC-CODE ~ 954-720-1999 ~ Fax: 954-720-7944
    Hours: 8:30 AM to 5:30 PM Eastern Standard Time

    Part III. Required Outlets

    New exception and diagram added to clarify that a countertop receptacle outlet isn’t required on a wall directly behind a rangetop or sink. And change clarifies when an island countertop is to be divided into separate sections when determining the number of required countertop receptacle outlets.

    (C) Countertop Receptacle – Dwelling Unit. In kitchens and dining rooms of dwelling units, receptacle outlets for countertop spaces must be installed according to (1) through (5) below. Figure 210-11

    Author’s Comment: GFCI protection is required for all 15 and 20A, 125V receptacles that supply kitchen countertop appliances [210.8(A)(6)].

    (1) Wall Counter Space. A receptacle outlet must be installed for each kitchen and dining area countertop wall space that is 1 ft or wider, and receptacles must be placed so no point along the countertop wall space is more than 2 ft, measured horizontally from a receptacle outlet.

    Ex: A receptacle outlet isn’t required on a wall directly behind a range or sink as shown in NEC Figure 210.52. Figure 210-12

    Author’s Comment: If the countertop space behind a range or sink is larger than the dimensions noted in Figure 210.52 of the NEC, then a GFCI protected receptacle must be installed in that space. This is because, for all practical purposes, if there’s sufficient space for an appliance, an appliance will be placed there.

    (2) Island Countertop Space. One receptacle outlet must be installed at each island countertop space with a long dimension of 2 ft or greater, and a short dimension of 1 ft or greater. When breaks occur in countertop spaces for appliances, sinks, etc., and the width of the counter space behind the appliance or sink is less than 1 ft, each countertop space is considered as a separate island for determining receptacle placement [210.52(C)(4)]. Figure 210-13

    Last edited by MD MASTER SPARKY; 02-24-2006, 11:26 AM.

  • #2
    Revised text to require, after January 1, 2008 that all dwelling unit bedroom branch-circuit AFCI protection devices must be listed as a “Combination Type AFCI.” And new exception permits AFCI protection by a device that isn’t a circuit breaker (such as a receptacle), but only if it meets stringent requirements.

    (B) Dwelling Unit Bedroom Circuits. All 15 or 20A, 120V branch circuits that supply outlets in dwelling unit bedrooms must be AFCI protected by a listed arc-fault circuit interrupter. Figure 210-10

    Author’s Comment: Smoke detectors connected to a 15 or 20A circuit must be AFCI protected if the smoke detector is located in the bedroom of a dwelling unit. The exemption of AFCI protection for the fire alarm circuit [760.21 and 760.41] doesn’t apply to the smoke detector's circuit, because a smoke detector circuit isn’t defined as a fire alarm circuit; it’s an “alarm circuit” [See NFPA 72, National Fire Alarm Code].

    After January 1, 2008 (basically a 2008 NEC requirement), AFCI protection shall be provided by a combination type AFCI protection device.

    Author’s Comment: Combination Type AFCI protection devices provide improved safety performance over existing AFCI protection devices, because the combination type is designed to detect arcs as low as 5A peak. Existing branch-circuit AFCI circuit breakers are designed to operate when the arcs exceeds 75A peak. See UL 1699, Standard for Arc-Fault Circuit Interrupters ( for information on differences between a branch-circuit type AFCI and a combination type AFCI.

    Ex: The location of the AFCI can be at other than the origination of the branch circuit if in compliance with (a) and (b).
    (a) The AFCI is installed within 6 ft of the branch-circuit overcurrent device as measured along the branch- circuit conductors.
    (b) The circuit conductors between the branch-circuit overcurrent device and the AFCI must be installed in a metal raceway or a cable with a metallic sheath.

    Author’s Comment: The 120V circuit limitation means that AFCI protection isn’t required for equipment rated 230V, such as baseboard heater or room air conditioner.


    • #3
      what is the cost for a afci? will they fit into an exisiting box like a gfi? do they wire up like a gfi with a load connection to protect downstream outlets?

      not too many gfi circut breakers are used anymore. most gfi are outlets and are 10% of the price of a breaker.

      will afci be the same

      phoebe it is


      • #4
        AFCI devices are still rather new to the industry

        i would suspect the cost would probobly be close to the gfci


        • #5
          Afci breakers cost between 50 to 35 dollars at most supply houses have better prices for breakers than your hardware stores. To my knowledge there is no afci outlets like GFCI's. An afci will trip when your ground and another wire touch.
          "Diplomacy is saying nice dodging until you can find a rock." Will Rogers
          "If a Monkey can do your job, are you in the right profession?


          • #6
            Originally posted by MD MASTER SPARKY
            AFCI devices are still rather new to the industry

            i would suspect the cost would probobly be close to the gfci
            They've been out and required for all outlets in bedrooms for 4 years. They were required for all receptacles in bedrooms prior to that. That's not exactly new, at least not new enough for a master electrician not to have priced one.
            Originally posted by Plumber Rick
            do they wire up like a gfi with a load connection to protect downstream outlets?
            They are actually referred to (officially) as "branch/feeder AFCI's."

            The arc fault requirement is actually unique, in that the entire circuit is required to be protected. The circuit starts at the breaker. Look for breakers with blue or green buttons in the next new home you go into. These are AFCI breakers.

            By contrast, wherever you see a GFCI installed, that receptacle is required to be GFCI protected, not the wiring in between receptacles.

            The GFCI's are to shut off power if it senses power "escaping" from the circuit, as it would if a person were receiving a shock. An AFCI (supposedly) detects arcing inside the wiring of a house, and shuts off the power when it detects it. In reality, the technology is a bit of a bust. The new technology on the way is supposed to be better (at least, more sensitive), but many very credible experts have their doubts about the technology. Or at least, how it was forced on us.


            • #7
              Hello there

              Indeed , most states do required AFCI in bedroom circuits but keep in your mind some states don't use the AFCI at all due some state or local addmentents.

              right now there are about 3 or 4 manufacters do make AFCI right now but cost wise it some how more than standard GFCI breaker is currently.

              unforetally we don't have AFCI repticale device yet but i am sure in a year or two it will come out [ who know when it will be ready that time ]

              thanks for your time to read this

              Merci , Marc

              P.S. I am master electricican in state of Wisconsin and French electrical codes