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3-way and 4-way switching location requirements

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  • kwired
    replied
    Originally posted by tom baker View Post
    Keep in mind you only need to install a lighting outlet and no luminaire is required, for a bedroom the light switch location is not specified and could be across the room...as pointed out if you wire a house to the NEC, the homeowner will not be pleased...
    Originally posted by 480sparky View Post
    Technically, one switch per level is all you need. Entire first floor.... one switch in the living room. Upper level... one switch in the hallway. Basement... one switch by the panel......
    For illumination of stairways over 6 risers.

    The mentioned bedroom lighting outlet - bedroom can be on third floor, needs a wall switch but code doesn't say where. A single switch three floors down is in compliance with code for that bedroom.

    Leave a comment:


  • 480sparky
    replied
    Originally posted by tom baker View Post
    Keep in mind you only need to install a lighting outlet and no luminaire is required, for a bedroom the light switch location is not specified and could be across the room...as pointed out if you wire a house to the NEC, the homeowner will not be pleased...
    Technically, one switch per level is all you need. Entire first floor.... one switch in the living room. Upper level... one switch in the hallway. Basement... one switch by the panel......

    Leave a comment:


  • LarryFine
    replied
    Now imagine having a home inspector as a customer.

    Leave a comment:


  • tom baker
    replied
    Keep in mind you only need to install a lighting outlet and no luminaire is required, for a bedroom the light switch location is not specified and could be across the room...as pointed out if you wire a house to the NEC, the homeowner will not be pleased...

    Leave a comment:


  • roger
    replied
    Originally posted by Frank DuVal View Post

    I'll keep installing three ways, my choice.
    Me too.

    Roger

    Leave a comment:


  • Frank DuVal
    replied
    I'm in agreement with youse guys.

    Most people were too cheap to leave stairway lights on all the time in single family residences (hear your father now, "Turnoff that light!"). So the only minimum expense solution back a few years was three way switches. Hence my sentiment comment. Not required, just common use to satisfy code.

    Now, however, leaving LED lights on all the time costs little in electricity (but a lot in replacement bulbs...) and occupancy sensors fill in nicely to eliminate three ways if you like.

    So, anyway you want to pass code is OK!

    I'll keep installing three ways, my choice.

    Leave a comment:


  • charlie b
    replied
    Originally posted by Frank DuVal View Post
    Where lighting outlets are installed in interior stairways, there shall be a wall switch at each floor level to control the lighting outlet where the stairway has six or more risers.
    This will (admittedly) be pushing the interpretation a bit. But the article talks about controlling the "outlet" (singular). This rule could apply to more than one stairway, but it implies that you have at least 2 switches controlling one lighting outlet at each stairway. This is not far from being a requirement for 3-way switching.

    Leave a comment:


  • al hildenbrand
    replied
    Originally posted by Frank DuVal View Post
    2012 Virginia Residential Code:

    R303.7Stairway illumination.
    All interior and exterior stairways shall be provided with a means to illuminate the stairs, including the landings and treads. Interior stairways shall be provided with an artificial light source located in the immediate vicinity of each landing of the stairway. For interior stairs the artificial light sources shall be capable of illuminating treads and landings to levels not less than 1 foot-candle (11 lux) measured at the center of treads and landings. Exterior stairways shall be provided with an artificial light source located in the immediate vicinity of the top landing of the stairway. Exterior stairways providing access to a basement from the outside grade level shall be provided with an artificial light source located in the immediate vicinity of the bottom landing of the stairway.

    Exception: An artificial light source is not required at the top and bottom landing, provided an artificial light source is located directly over each stairway section.

    R303.7.1Light activation.
    Where lighting outlets are installed in interior stairways, there shall be a wall switch at each floor level to control the lighting outlet where the stairway has six or more risers. The illumination of exterior stairways shall be controlled from inside the dwelling unit.

    Exception: Lights that are continuously illuminated or automatically controlled.



    OK, so the words "Three Way" are not in there, but the sentiment is....
    Note that the wall switch, at the minimum, is controlling a SINGLE Lighting Outlet.

    While it is convenient to control both lighting outlets with a pair of three way switches, the ordinance you quote is not written that way.

    And, the 1 foot-candle illumination requirement is only necessary to be met when both of the lights are on.

    Not one word is said about the act of switching on and off of the Lighting Outlets simultaneously from only one switch (of a three way setup.)

    Leave a comment:


  • 480sparky
    replied
    Originally posted by Frank DuVal View Post
    ......
    OK, so the words "Three Way" are not in there, but the sentiment is....

    If 'the sentiment' is to require 3-ways, then it would say '3-way'.

    Leave a comment:


  • Frank DuVal
    replied
    2012 Virginia Residential Code:

    R303.7Stairway illumination.
    All interior and exterior stairways shall be provided with a means to illuminate the stairs, including the landings and treads. Interior stairways shall be provided with an artificial light source located in the immediate vicinity of each landing of the stairway. For interior stairs the artificial light sources shall be capable of illuminating treads and landings to levels not less than 1 foot-candle (11 lux) measured at the center of treads and landings. Exterior stairways shall be provided with an artificial light source located in the immediate vicinity of the top landing of the stairway. Exterior stairways providing access to a basement from the outside grade level shall be provided with an artificial light source located in the immediate vicinity of the bottom landing of the stairway.

    Exception: An artificial light source is not required at the top and bottom landing, provided an artificial light source is located directly over each stairway section.

    R303.7.1Light activation.
    Where lighting outlets are installed in interior stairways, there shall be a wall switch at each floor level to control the lighting outlet where the stairway has six or more risers. The illumination of exterior stairways shall be controlled from inside the dwelling unit.

    Exception: Lights that are continuously illuminated or automatically controlled.



    OK, so the words "Three Way" are not in there, but the sentiment is....

    Leave a comment:


  • 480sparky
    replied
    A complete list of ALL the locations in the 2017 where '3-way' actually appears:

    200.7(C)(1) [use of white conductor].






    Yep, that's it.

    Leave a comment:


  • infinity
    replied
    Originally posted by infinity View Post
    That would be a local amendment as it is not required under the NEC.
    Originally posted by brantmacga View Post
    210.70(A)(2)(3) ?
    As stated below 3-ways is one way to comply with that section but it is not a requirement.

    Originally posted by kwired View Post
    That section doesn't exactly require use of three/four way switches, though use of those is one of most common methods to comply.
    Originally posted by 480sparky View Post
    There is no requirement for a 3-way there.
    I agree.

    Leave a comment:


  • 480sparky
    replied
    Originally posted by brantmacga View Post
    210.70(A)(2)(3) ?


    Sent from my iPhone using Tapatalk

    There is no requirement for a 3-way there.

    Leave a comment:


  • kwired
    replied
    Originally posted by brantmacga View Post
    210.70(A)(2)(3) ?


    Sent from my iPhone using Tapatalk
    That section doesn't exactly require use of three/four way switches, though use of those is one of most common methods to comply.

    Leave a comment:


  • brantmacga
    replied
    Originally posted by infinity View Post
    That would be a local amendment as it is not required under the NEC.
    210.70(A)(2)(3) ?


    Sent from my iPhone using Tapatalk

    Leave a comment:

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