90 degree listed light fixtures
- Thread starter gmreynol
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Re: 90 degree listed light fixtures
I left My book in the truck so bear with Me. I think 410.35 (A) ? Also, depending on what codes were adopted at that time most wiring was only rated at 60c. This can be a problem in the outlet box when installing 90c rated enclosed lamp/bulb type fixture against the ceiling.The older 60c rated wire can "cook" so to speak. If they are attic accessible Install a J box and run 90c NMB to fixture outlet box.
I left My book in the truck so bear with Me. I think 410.35 (A) ? Also, depending on what codes were adopted at that time most wiring was only rated at 60c. This can be a problem in the outlet box when installing 90c rated enclosed lamp/bulb type fixture against the ceiling.The older 60c rated wire can "cook" so to speak. If they are attic accessible Install a J box and run 90c NMB to fixture outlet box.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
Re: 90 degree listed light fixtures
What I'm thinking of must be new to the '05, 'cause I'm not finding it in '02. It might be the section triphase is referring to.
Essentially there's a prescribed method for this problem, but I'm not finding it.
Off the top of my head, I believe you can install a second box 1 foot away, and run 90? rated conductors to the new box.
Full respect should be given to this. On a similar note, I heard of someone installing three 100W lamps where the fixture called for three 60W's. The AFCI started kicking. By the time the call came in everything within a 2' radius (truss, insulation, NM, the box) were charred.
I wish I could give a first-hand account, I was interested to know what aspect of the damage caused the AFCI to trip. I never heard anything conclusive.
What I'm thinking of must be new to the '05, 'cause I'm not finding it in '02. It might be the section triphase is referring to.
Essentially there's a prescribed method for this problem, but I'm not finding it.
Off the top of my head, I believe you can install a second box 1 foot away, and run 90? rated conductors to the new box.
Full respect should be given to this. On a similar note, I heard of someone installing three 100W lamps where the fixture called for three 60W's. The AFCI started kicking. By the time the call came in everything within a 2' radius (truss, insulation, NM, the box) were charred.
I wish I could give a first-hand account, I was interested to know what aspect of the damage caused the AFCI to trip. I never heard anything conclusive.
Re: 90 degree listed light fixtures
Just for grins I posed this same question to the "HOME DEPOT" question service. When they describe how to replace a fixture they avoid mentioning the 90degC issue. I posed the question that most, if not all, fixtures available today are rated for installation to wired to 90degC rated wire, and, if so, how do you address the fact that these "new" fixtures are often being used to replace fixutres in older home with 60degC wire. Also, since older fixtures often get so hot that the 60degC wire deteriorates, especially when the fixture has been over lamped, what do you do when the insulation crumbles and falls off of the wire?
I'm glad I'm not holding my breath for an answer because I expect I may be waiting a long time.
Just for grins I posed this same question to the "HOME DEPOT" question service. When they describe how to replace a fixture they avoid mentioning the 90degC issue. I posed the question that most, if not all, fixtures available today are rated for installation to wired to 90degC rated wire, and, if so, how do you address the fact that these "new" fixtures are often being used to replace fixutres in older home with 60degC wire. Also, since older fixtures often get so hot that the 60degC wire deteriorates, especially when the fixture has been over lamped, what do you do when the insulation crumbles and falls off of the wire?
I'm glad I'm not holding my breath for an answer because I expect I may be waiting a long time.
Re: 90 degree listed light fixtures
There is no answer "Wirings No Hobby" I know what you mean. I see people "wondering aimlessly" around these stores puchasing these products and I can not help but to think what is supplying that equipment, device, etc.? I was the Electrician for a Northern Florida Housing Authority four years ago, units built in the very early 80s and before I got there the maintenance staff was replacing the old fixtures with the 90c rated and over the years the problems started 60c wire just crumbled by lookin at it. My previous reply was the repair! "Thought I would share that".
There is no answer "Wirings No Hobby" I know what you mean. I see people "wondering aimlessly" around these stores puchasing these products and I can not help but to think what is supplying that equipment, device, etc.? I was the Electrician for a Northern Florida Housing Authority four years ago, units built in the very early 80s and before I got there the maintenance staff was replacing the old fixtures with the 90c rated and over the years the problems started 60c wire just crumbled by lookin at it. My previous reply was the repair! "Thought I would share that".
gmreynol
Member
Re: 90 degree listed light fixtures
thank you for your replies , I checked a couple of web sites of major lighting manufactures and found nothing concerning this matter at all, even though a major portion of there sales have to be going in homes not wired with 90 degree conductors. It is strange to me that this is such a common practice, but no one is talking about it. To me this is saying remove the old wiring, in a round about way. It is never cited because no one pulls permits to a change a light fixture.
thank you for your replies , I checked a couple of web sites of major lighting manufactures and found nothing concerning this matter at all, even though a major portion of there sales have to be going in homes not wired with 90 degree conductors. It is strange to me that this is such a common practice, but no one is talking about it. To me this is saying remove the old wiring, in a round about way. It is never cited because no one pulls permits to a change a light fixture.
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