'official' listed use for a basic 4 square box

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skeptic66067

skeptic66067

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I would like feedback on the offical listed uses for a basic 4 square box. I have been installing a GFCI in a 4 square box on a cord drop with a kellums strain relief connector for shop table use for a long time now. The cord originates at a four square box mounted to a 2 X 6 on a truss up high with another kellums. We had a state safety official go through our shop recently and said that use of a 4 square box in this manner isn't what it is listed for. What does everyone think?
 
'official' listed use for a basic 4 square box

Ok. Some of the points here are valid, but I don't read 314.23(H)(1) as prohibiting the use with an approved connector (kellums) it actually it allows for it. The idea that the KOs can be pushed in and short out against the device is true I guess but I thought that is why we ground the box. If we find the KOs bent in a little bit we change out the enclosure or if the device developes a crack we change out the device.
 
skeptic66067 said:
Ok. Some of the points here are valid, but I don't read 314.23(H)(1) as prohibiting the use with an approved connector (kellums) it actually it allows for it. The idea that the KOs can be pushed in and short out against the device is true I guess but I thought that is why we ground the box. If we find the KOs bent in a little bit we change out the enclosure or if the device developes a crack we change out the device.
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It is my opinion that the code section that you have cited requires that the hub be an actual part of the box....not one that you install in a KO on the box.
(1) Flexible Cord A box shall be supported from a multiconductor cord or cable in an approved manner that protects the conductors against strain, such as a strain-relief connector threaded into a box with a hub.
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don_resqcapt19 said:
It is my opinion that the code section that you have cited requires that the hub be an actual part of the box....not one that you install in a KO on the box.
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Great point Don. So in the application that I have listed, in your opinion, I could hang a bell box from a kellums strain relief connector and please the authorities having jurisdiction ?
 
skeptic66067 said:
Great point Don. So in the application that I have listed, in your opinion, I could hang a bell box from a kellums strain relief connector and please the authorities having jurisdiction ?
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I would say that a bell box or FS box with integral hubs would meet the requirements of that section and be OK.

Chris
 
As much as I don't like that type of install I will say it is compliant. As long as the box has hubs in it ( not KO's)
Yes that was painful to say too!

I've seen lots of this in the shop classes at schools. It just seems like a bad idea to me. I would rather see them cough up the cash and get the manufactured cord drop reels that are installed on the ceilings.
 
luckyshadow said:
As much as I don't like that type of install I will say it is compliant. As long as the box has hubs in it ( not KO's)
Yes that was painful to say too!

I've seen lots of this in the shop classes at schools. It just seems like a bad idea to me. I would rather see them cough up the cash and get the manufactured cord drop reels that are installed on the ceilings.
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Why? Just curious of course.
 
skeptic66067 said:
Great point Don. So in the application that I have listed, in your opinion, I could hang a bell box from a kellums strain relief connector and please the authorities having jurisdiction ?
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You could, and you might still get busted with 110.3(B) as a "Bell box" is not designed to be supported by the hub.

There are manufacturers who make listed pendent boxes with threaded hubs.
 
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