Announcement

Collapse
No announcement yet.

#14 switchlegs on a 20A light circuit

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    #14 switchlegs on a 20A light circuit

    There used to be a practice to run switch legs for lighting on 14 ga even though the circuit was 20 amp overcurrent device. Is this an acceptable practice still? I have not seen anyone do this for a long time in my jurisdiction and wondering if I am missing something. Do not want to reject something that is acceptable. Thank you.

    #2
    Originally posted by 102 Inspector View Post
    There used to be a practice to run switch legs for lighting on 14 ga even though the circuit was 20 amp overcurrent device. Is this an acceptable practice still? I have not seen anyone do this for a long time in my jurisdiction and wondering if I am missing something. Do not want to reject something that is acceptable. Thank you.
    20 amp means 20 amp! Use 20 amp wire............ period!

    Sent from my SM-T350 using Tapatalk

    Comment


      #3
      Something that was done a lot in some places, think it would have been a very long time ago if it ever actually was NEC acceptable, like possibly back when knob and tube wiring was still the main wiring method being used.
      I live for today, I'm just a day behind.

      Comment


        #4
        Originally posted by 102 Inspector View Post
        There used to be a practice to run switch legs for lighting on 14 ga even though the circuit was 20 amp overcurrent device. Is this an acceptable practice still? I have not seen anyone do this for a long time in my jurisdiction and wondering if I am missing something. Do not want to reject something that is acceptable. Thank you.
        the premise would have been that the connected load would normally
        have been a couple hundred watts, and you'd never overload a #14
        wire.

        not code compliant. never has been, to my knowledge.
        ~New signature under construction.~
        ~~~~Please excuse the mess.~~~~

        Comment


          #5
          Originally posted by kwired View Post
          Something that was done a lot in some places, think it would have been a very long time ago if it ever actually was NEC acceptable, like possibly back when knob and tube wiring was still the main wiring method being used.
          You must use correct wire size to breaker not load. I worked with people who focused on load more than Supply. It's the breaker size that determines the wire size. Within its context.

          Sent from my SM-T350 using Tapatalk

          Comment


            #6
            At least I know I am not completely crazy. I seem to remember a few old timers doing this in the late 80's, but had not seen it for a long time. It is a shame that contractor now has to replace 500 feet of wiring just because of switch leg reduction of conductor sizing. I know the argument will be that it is LED lighting with minimal load, but as stated, it is the supply that dictates the conductor sizing, not the loading. thanks for the quick responses.

            Comment


              #7
              Originally posted by 102 Inspector View Post
              At least I know I am not completely crazy. I seem to remember a few old timers doing this in the late 80's, but had not seen it for a long time. It is a shame that contractor now has to replace 500 feet of wiring just because of switch leg reduction of conductor sizing. I know the argument will be that it is LED lighting with minimal load, but as stated, it is the supply that dictates the conductor sizing, not the loading. thanks for the quick responses.
              Why would the wire and not the OCPD be replaced?
              Don, Illinois
              (All code citations are 2017 unless otherwise noted)

              Comment


                #8
                TABLE 210.24 TAPS

                There are allowable branch circuit taps per Table 210.24. Maybe the OP had learned from those who utilize these taps, whether code compliant or not. I've worked with electricians who believed they could tap circuits for an individual receptacle or light fixture without distance limitations. Per 210.19(A)(4) Exception #1, the uses for these taps is quite limited.

                Comment


                  #9
                  Originally posted by 102 Inspector View Post
                  At least I know I am not completely crazy. I seem to remember a few old timers doing this in the late 80's, but had not seen it for a long time. It is a shame that contractor now has to replace 500 feet of wiring just because of switch leg reduction of conductor sizing. I know the argument will be that it is LED lighting with minimal load, but as stated, it is the supply that dictates the conductor sizing, not the loading. thanks for the quick responses.
                  Just change the breaker to 15 amps. Double check full load on that circuit. If load is too much split the circuit at easiest point and reseed it.

                  Sent from my SM-T350 using Tapatalk

                  Comment


                    #10
                    Originally posted by Daniel malack View Post
                    Just change the breaker to 15 amps. Double check full load on that circuit. If load is too much split the circuit at easiest point and reseed it.

                    Sent from my SM-T350 using Tapatalk
                    Reseed it ()

                    Sent from my SM-T350 using Tapatalk

                    Comment


                      #11
                      I agree with Don and Daniel. I don't know of any requirement for lighting to be on a 20 amp circuit. Just replace the breaker with a 15 amp version, and the wires can remain in place.
                      Charles E. Beck, P.E., Seattle
                      Comments based on 2017 NEC unless otherwise noted.

                      Comment


                        #12
                        Originally posted by Daniel malack View Post
                        Reseed it ()

                        Sent from my SM-T350 using Tapatalk
                        "refeed it"? Dang Ought-To-Correct.

                        Comment


                          #13
                          Originally posted by GoldDigger View Post
                          "refeed it"? Dang Ought-To-Correct.
                          You meant "Auto Korekt"??
                          Edward
                          The only thing I know, is the progressive discovery of my ignorance

                          Comment


                            #14
                            Originally posted by edward View Post
                            You meant "Auto Korekt"??
                            Utoctc

                            Sent from my SM-T350 using Tapatalk

                            Comment


                              #15
                              Originally posted by charlie b View Post
                              I agree with Don and Daniel. I don't know of any requirement for lighting to be on a 20 amp circuit. Just replace the breaker with a 15 amp version, and the wires can remain in place.
                              That might be a code violation if wired to 3va per foot. Just make sure its not- and the circuit can do without those 5 extra amps.

                              Comment

                              Working...
                              X