OC Devices in Clothes Closets

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sandsnow

sandsnow

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Install concists of a motorized drapery controller mounted in a clothes closet. There are fuses inside the controller enclosure on the load side of the LV power supply.

So I told the contractor the controller cannot be located in the closet. 240.24(D)

I don't see anyway around this for him.

Question: Did I miss something that would allow this to remain???
 
Larry since the fuses were on the load side of the LV transformer, would not the installation of the part from the LV transformer downstream not be subject to chapter 240 unless specifically referenced in the appropriate article for that low voltage portion? (no code book handy at the moment, hence no ability to reference the right article)
 
macmikeman said:
Larry since the fuses were on the load side of the LV transformer, would not the installation of the part from the LV transformer downstream not be subject to chapter 240 unless specifically referenced in the appropriate article for that low voltage portion? (no code book handy at the moment, hence no ability to reference the right article)
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I thought about that. 240 does not have an exception for LV or Class 2 or 3 power supply overcurrent protection in the scope. There is nothing in article 725 covering this either.
 
Hmm... I vaguely remember working on many household alarm panels in residential closets. Alarm control panels plug into a LV transformer and have fuses on the load side also. Some of the Westec units are as large as a suitcase. Article 240.24(D) does indeed appear to apply to Article 725 circuits, but perhaps the fuses are part of the listed assembly and not subject to the NEC.

Silly question, does this controller have a UL listing, or is it somehow expected to hire a third party inspector for each installation? They must have a technical support number. Something doesn't make sense.
 
Larry
Those are supplementary overcurrent devices, they are part of the manufactured product. They are not branch circuit protection. In that case, since they are not part of the circuit, and they are part of the assembled equipment, maybe I would consider this as an acceptable installation. I have to think more about this... what do you think?
 
90.7 Examination of Equipment for Safety.
For specific items of equipment and materials referred to in this Code, examinations for safety made under standard conditions provide a basis for approval where the record is made generally available through promulgation by organizations properly equipped and qualified for experimental testing, inspections of the run of goods at factories, and service-value determination through field inspections. This avoids the necessity for repetition of examinations by different examiners, frequently with inadequate facilities for such work, and the confusion that would result from conflicting reports on the suitability of devices and materials examined for a given purpose.

It is the intent of this Code that factory-installed internal wiring or the construction of equipment need not be inspected at the time of installation of the equipment, except to detect alterations or damage, if the equipment has been listed by a qualified electrical testing laboratory that is recognized as having the facilities described in the preceding paragraph and that requires suitability for installation in accordance with this Code.
 
Pierre C Belarge said:
Larry
Those are supplementary overcurrent devices, they are part of the manufactured product. They are not branch circuit protection. In that case, since they are not part of the circuit, and they are part of the assembled equipment, maybe I would consider this as an acceptable installation. I have to think more about this... what do you think?
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It is a listed product. Nothing about location in the instructions except well ventilated location.

Yes they are supplementary overcurrent devices. Look at 240.24(D), 240.24(C) and then 240.24(E). "E" gives an exception to supplementary overcurrent devices, where "C" and "D" do not.
 
Just a thought ,what about a flourescent fixture with a inline fuse in a clothes closet ??? Wouldn`t that be the same scenario.I feel the article was to keep panels out of closets and not suplimentrey protection devices from being in a closet.Any thoughts ?????
 
allenwayne said:
Just a thought ,what about a flourescent fixture with a inline fuse in a clothes closet ??? Wouldn`t that be the same scenario.I feel the article was to keep panels out of closets and not suplimentrey protection devices from being in a closet.Any thoughts ?????
Click to expand...

Good point about the flourescent.

I think the Code should make an exception for suppl. overcurrent devices
 
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