Enclosure in ceiling

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wjbarricklow

Member
Location
South Florida
Occupation
Telecom Project Manager
I have a project where we are installing Legrand AV-ONT-ENP1705-NA-V1 enclosures inside an senior nursing/housing facility. They're intended for wall mount. In some areas, customer has asked us to mount them on the wall above the ceiling.

We've been told by someone who isn't involved in the project that these are "not rated for an enclosed space".

Do any of you see why this product can't be in a ceiling? I can't see a plenum rating addressed, but but that only matters if we don't have ducted returns.

ENP1705NAV1.pdf
 
It's a Netgear 105 switch, a 25W power supply, and a jack.

Power supply is being fed by a 15A dual outlet the electrician is installing beside the box. There is an option to place an outlet in the box, but right now the electrical contractor is placing them on the wall.

There is a reputable electrician and two low voltage contractors involved in this and no one has mentioned any kind of code violation.
 
wjbarricklow said:
Power supply is being fed by a 15A dual outlet the electrician is installing beside the box. There is an option to place an outlet in the box, but right now the electrical contractor is placing them on the wall.
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It has to be in the box. You can have a receptacle in the ceiling space but you can't have anything plugged into it permanently.

-Hal
 
The electrician has already put in the outlets.

It's the cord under article 400 that's stopping me from putting it in the ceiling, right? The electrician didn't break any rules by putting the outlet in the ceiling, we just can't plug in an AC cord to feed permanent equipment, right?

This isn't an AC cord, so this would be legal, right?

1763735969620.png

As far as the equipment and outlet being in the enclosure, I see an exception for HVAC equipment in an enclosure. I don't know that the exception applies to data.
 
This isn't an AC cord, so this would be legal, right?
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Nice try. That's a CORD.

Actually, you may be able to get away with a plug-in power supply or transformer that has screw terminals on it, and you run a CL2 listed 18/2 cable from it like the security guys do. That is if you can make it work with the Netgear.

So, once again we are back to doing it right and putting the receptacle in the box. There's a reason it has the provision for it.

-Hal
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I disagree. If the cordage says SOT for instance on it, what difference does it make if it was used by a manufacturer for a line cord or field wired? It's still SOT.

I also know that you cannot fasten line cords to a backboard or structure.

-Hal
 
hbiss said:
I disagree. If the cordage says SOT for instance on it, what difference does it make if it was used by a manufacturer for a line cord or field wired? It's still SOT.

I also know that you cannot fasten line cords to a backboard or structure.

-Hal
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Well what about any number of other things that come provided with equipment that do not comply with the NEC? "Undersized" wiring, maybe non NEC wire types, etc
 
Not talking about what's inside equipment! We're talking about the line cords here. Even though the equipment is listed, unless it says in the manufacturer's instructions that the line cord may be run above the ceiling or fastened to the wall or backboard you can't do it.

I even vaguely recall some instructions that actually caution against fastening the line cord to anything.

-Hal
 
hbiss said:
Not talking about what's inside equipment! We're talking about the line cords here. Even though the equipment is listed, unless it says in the manufacturer's instructions that the line cord may be run above the ceiling or fastened to the wall or backboard you can't do it.

I even vaguely recall some instructions that actually caution against fastening the line cord to anything.

-Hal
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So you get to choose which part of equipment you will apply the NEC to? You will apply it to some parts but not others?
 
electrofelon said:
electrofelon said:
So you get to choose which part of equipment you will apply the NEC to? You will apply it to some parts but not others?
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The equipment is listed for use in an environment where it would normally be used, hence the line cord and wall wart. If you install it somewhere else or in a way where flexible cordage isn't permitted, that voids the listing.

If it were intended for this kind of installation, it would have provisions for hard wiring as I said above with CL2 wiring, or PoE.

-Hal
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I appreciate all the comments. Ideally, everything would be installed down low where it was accessible.

When they asked to have it installed in the ceiling, the outlets should have been in the boxes.

Going forward, that's what I'm asking for. The customer is hiring the electrician and directing them, but the work hasn't been consistent.
 
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