410.118 interpretation discussion

Lyle Nisly

New User
Location
Nebraska
Occupation
Electrician
I would love to speak with the folks that wrote this code and ask them personally what their intent was. I am wondering if I am the only person to question the apparent prevalent interpretation of this code section? 410.110 states that for luminaires recessed in walls or ceilings, We are to comply with 410.115-410.126.... My contention is that the Jbox and whip referenced and allowed in 410.117C ought to allow for a jbox and whip (conduit body) installed for the light for the Tap conductors That are feeding the listed light referenced in 410.118. These items ought to be looked at as integral or necessary for the listed luminaire installation because they sure will not work without it. Currently our state (Im sure it is not the only one) has adopted the position that it means only a jbox UL listed, a part of, and attached to the listed luminaire is allowed up there. This means that either we need to run the tap conductors into and out of the tiny wire space provided by the light (Most of them are pretty small) . This possibly violates wire fill; I have been told that is what some electricians are doing ... (Running their conduit body and then transitioning from conduit to flex in and out to feed the luminaires). Or we need to install access panels to access these 410.117C "Tap Conductor" j boxes, or we need to rough in a j box down into the ceiling pointing down and then whip to the light through the back of this j box (best option of all three) My reason I disagree with the currant interpretation is that ... How is this considered safer? Nor does it help the aesthetics...

Almost all flat panels and most other recessed lay in LED lights are all serviced from the top. meaning they must be taken down or to be serviced anyway.How is this code simplifying this? Would not a single 6' luminaire whip That is easily taken out of the circuit and or the light... be infinitely safer than attempting to remove the in and out tap conductors from the light? Doesn't that delete the purpose of the little required light disconnects? The luminaire could be easily disconnected by the required little disconnect in the fixture, removed and replaced.
I seem to be in the minority, but I personally think the proper interpretation of this code section allows for the JBox and whip referenced in 410.117C But then moves to 410.118 to state that "All other J boxes" not an integral part of the lighting system is not allowed. I would actually agree that boxes not pertaining to the lights do not need to be there. But to restrict the ones necessary to the function of the lighting circuit is kind of silly. One other thought..., unless we bring the plumbers and sprinkler fitters and hvac trades ect . into compliance of the intent of this code, the purpose and intent of this code is rendered null and pointless (Because they will still continue to consider these lights their access points in a hard lid ceiling.) Has it been incorporated into their code? This interpretation of "no boxes for the lights other than the one on the light itself", is placing undue hardship on the very people who should be qualified to remove the fixtures for replacement or service. Also, it potentially violates the listed manufacturer instructions for box fill on these lights.
Now we are telling the Architects/engineers that they must install access panels everywhere thus unnecessarily ruining the aesthetics of the finished hard lid ceiling. I think there needs to be an amendment to this code changing the last 2 words of this code from listed luminaire to lighting system. What are your thoughts? Have a great Day
 
Go back and read the proposals, comments, and panel statements from when this rule was put into the code. That is the best insight as to why the change was made. All of that information is online.

As far as any amendment, remember that the NFPA and the code making panels do not, in general, write the code. The code is based on the CMPs action on submitted public inputs and public comments.

The system should open up for the submission of Public Inputs to make changes in the 2029 code in August or September of this year, so work up language for your public input.
 
As far as any amendment, remember that the NFPA and the code making panels do not, in general, write the code.
CMP 18 did happen to write that proposal, First Revision No. 8412-NFPA 70-2018 for the 2020 NEC:
Submitter Information Verification
Submitter Full Name: NEC-CMP Panel 18
Organization: [ Not Specified ]
Committee Statement and Meeting Notes
Statement:
The new text clarifies that a luminaire cannot be used to access junction boxes that
are not associated with wiring for the luminaire
 
CMP 18 did happen to write that proposal, First Revision No. 8412-NFPA 70-2018 for the 2020 NEC:
That does happen, but it is not very common, however this change was based on PI 1805. It was rewritten, and relocated, and submitted as a separate PI.
The panel statement says something much different that what 410.118 says. A box that contains the branch circuit that supplies the luminaire would be associated with the wiring for the luminaire, but the code requires the box to be part of the luminaire itself. Not remotely close to being the same.

Public Comment 1311 suggested a reasonable exception that was rejected.
Exception: Luminaires that when removed create an access opening in the ceiling of at least 0.32 m2 (3.44 ft2) shall be permitted to be used to access outlet, pull, or junction boxes, or conduit bodies that are not an integral part of the luminaire.
Panel Statement
Resolution: If a luminaire is used for access it may compromise the integrity of the ceiling and luminaire due to repeated removal and re-installation.
 
Is there a locked forum somewhere in here that directs someone how to find this stuff? I have tried googling it but I just don't know how to find revisions, dates on PIs, etc.
 
Is there a locked forum somewhere in here that directs someone how to find this stuff? I have tried googling it but I just don't know how to find revisions, dates on PIs, etc.
You go to nfpa.org/70 select the edition and then select "view archived revision information". You do need to know the edition that the change was made in.
 
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