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    Generator Interlock Kits

    Would someone accept these third party interlocks as code compliant even though they're not listed? I guess by NEC definition they could be called identified.



    http://www.interlockkit.com/?gclid=C...FYje4AoduQIAog
    Rob

    Moderator

    All responses based on the 2017 NEC unless otherwise noted

    #2
    Do insurance companies except interlock installations -are these interlocks nec compliant I can't find any article that covers this ?

    Comment


      #3
      Originally posted by liquidtite View Post
      Do insurance companies except interlock installations -are these interlocks nec compliant I can't find any article that covers this ?
      702.5 Transfer Equipment. Transfer equipment shall be
      suitable for the intended use and designed and installed
      so as to prevent the inadvertent interconnection of normal
      and alternate sources of supply in any operation of
      the transfer equipment. Transfer equipment and electric
      power production systems installed to permit operation
      in parallel with the normal source shall meet the requirements
      of Article 705.
      This is part of 702.5. I see the interlock as "suitable for the intended use" and it "prevents inadvertent interconnection".
      Organized people are people that are just too lazy to look for their stuff

      Comment


        #4
        Originally posted by ceb58 View Post
        This is part of 702.5. I see the interlock as "suitable for the intended use" and it "prevents inadvertent interconnection".
        See this thread.

        Panelboards are listed under UL 67. Modifications, including field modifications, to those would be covered by that UL standard. And since the panelboard is required by NEC to be UL listed, one can argue that any modification must maintain that listing.

        Many interlock kits are designed specifically for particular panel brands and configurations. And some if not all assert that they are listed under UL 67.
        Unfortunately I cannot afford a copy of UL 67, so I can't say more about what it allows in the way of interlock kits, especially third party. Kits from the individual manufacturer are presumably OK.

        Here is one example of third-party interlocks, with words about UL 67.
        Last edited by GoldDigger; 03-21-13, 11:28 PM.

        Comment


          #5
          These interlocks are commonly installed around here and are accepted by the AHJs, they are identified for the purpose.
          Moderator-Washington State
          Ancora Imparo

          Comment


            #6
            Originally posted by GoldDigger View Post
            See this thread.

            Panelboards are listed under UL 67. Modifications, including field modifications, to those would be covered by that UL standard. And since the panelboard is required by NEC to be UL listed, one can argue that any modification must maintain that listing.

            Many interlock kits are designed specifically for particular panel brands and configurations. And some if not all assert that they are listed under UL 67.
            Unfortunately I cannot afford a copy of UL 67, so I can't say more about what it allows in the way of interlock kits, especially third party. Kits from the individual manufacturer are presumably OK.

            Here is one example of third-party interlocks, with words about UL 67.

            Lets not forget that ULs postion is that it is up to the AHJ to determine if feild modifications have changed things enough to warrant refusing the installation or having a UL feild evaluation done.

            Comment


              #7
              I just wonder why you would go through all of this trouble to manufacture a product ($$$ I would guess) and not have it listed so that there is no question of it's suitability from the end user. Their website states that it's tested on UL67 listed panelboards and makes no mention of the actual product listing. I e-mailed them some time ago asking for clarification but they never responded.


              Tested for use with UL 67 Listed Panelboards
              Ref. Wyle Laboratories Test Report T52431-01


              Wyle is a Nationally Recognized Testing Laboratory authorized by OSHA for UL standard
              67 and recognized by all 50 US States

              Rob

              Moderator

              All responses based on the 2017 NEC unless otherwise noted

              Comment


                #8
                One reason for a slow reply might be that Wyle lost their NRTL status IIRC.

                The interlock kit makers probably are not happy with that and may be reluctant to talk about it.
                "Electricity is really just organized lightning." George Carlin


                Derek

                Comment


                  #9
                  Originally posted by jumper View Post
                  One reason for a slow reply might be that Wyle lost their NRTL status IIRC.
                  That is correct.

                  Comment


                    #10
                    The vast majority of EI's in northern NJ are not accepting these interlock kits. IMHO, they are a safety device, they work and their intended use is obvious. It is far safer than back-feeding a house through an AC disconnect. However, the EI's reasons for non-acceptance include :
                    • They are not UL listed for the specific panel
                    • Making holes in the panel cover may weaken the cover
                    • If you remove the panel cover it is no longer a safe situation (like I would have a reason to remove the panel cover during a power outage as opposed to any other time)
                    • Use of these devices may require the use of piggy-back breakers in fully loaded panels where these breakers may not be acceptable for use.

                    Unless the State intervenes and accepts these interlock kits as approved safety devices EI's will continue to cover their butts by not accepting them.

                    Comment


                      #11
                      Originally posted by goldstar View Post
                      The vast majority of EI's in northern NJ are not accepting these interlock kits. IMHO, they are a safety device, they work and their intended use is obvious. It is far safer than back-feeding a house through an AC disconnect. However, the EI's reasons for non-acceptance include :
                      • They are not UL listed for the specific panel
                      • Making holes in the panel cover may weaken the cover
                      • If you remove the panel cover it is no longer a safe situation (like I would have a reason to remove the panel cover during a power outage as opposed to any other time)
                      • Use of these devices may require the use of piggy-back breakers in fully loaded panels where these breakers may not be acceptable for use.
                      Unless the State intervenes and accepts these interlock kits as approved safety devices EI's will continue to cover their butts by not accepting them.
                      I believe both of these kits from Square D are UL listed.
                      QOCRBGK1
                      PK4DTIM4LA
                      http://static.schneider-electric.us/...1100HO9902.pdf

                      Would the EI still reject them if used on the panel they were designed for?
                      Last edited by eHunter; 03-22-13, 06:49 AM.

                      Comment


                        #12
                        Kirk Key has been in business since the 1930's Installation requires modification of the panels. They have been accepted by Govt installations, schools, industrial etc. for years. So, I ask, are they UL listed for each and every panel they are installed on? I feel that an AHJ that denies the OP's device is being disingenuous. It is a cost effective, and extremely, operationally effective piece of equipment. I would appeal any AHJ's denial to a higher authority. Common sense disputes all of the arguments presented from the AHJ here. I am pretty sure that the local AHJ would approve of this before they would approve of my money saving method of hooking up my portable generator on the off chance my power goes out !


                        I know what I don't know, and I know where to go to find it!

                        Comment


                          #13
                          Originally posted by eHunter View Post
                          I believe both of these kits from Square D are UL listed.
                          QOCRBGK1
                          PK4DTIM4LA
                          http://static.schneider-electric.us/...1100HO9902.pdf

                          Would the EI still reject them if used on the panel they were designed for?
                          The units you've shown are retaining kits for back-fed breakers if you're converting a main lug panel to a main breaker panel. These are not used for portable generator installs. They have no way of interlocking with a main breaker unless I'm missing something.

                          Comment


                            #14
                            Originally posted by Strathead View Post
                            Kirk Key has been in business since the 1930's Installation requires modification of the panels. They have been accepted by Govt installations, schools, industrial etc. for years. So, I ask, are they UL listed for each and every panel they are installed on? I feel that an AHJ that denies the OP's device is being disingenuous. It is a cost effective, and extremely, operationally effective piece of equipment. I would appeal any AHJ's denial to a higher authority. Common sense disputes all of the arguments presented from the AHJ here. I am pretty sure that the local AHJ would approve of this before they would approve of my money saving method of hooking up my portable generator on the off chance my power goes out !
                            I'm with you 100%. But if they're not accepted - they're not accepted. You can appeal and yell and scream all you want but it won't pass (in many areas).

                            Comment


                              #15
                              Originally posted by goldstar View Post
                              The units you've shown are retaining kits for back-fed breakers if you're converting a main lug panel to a main breaker panel. These are not used for portable generator installs. They have no way of interlocking with a main breaker unless I'm missing something.
                              Sorry about that. I plead guilty to operating without the influence of my morning caffeine.
                              Try these instead.
                              Page 17
                              http://static.schneider-electric.us/...1100CT0501.pdf
                              Page 13
                              http://static.schneider-electric.us/...0110PL9401.pdf

                              Comment

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