UL Question

[spark master]

I'm looking at a plastic switch plate cover, and it has the little UL symbol.

What about device screws, are they UL approved as well ?
What if I take out the short screws, and install 3" long screws for a marble back splash? Do I need to get UL approved screws ? :?

 

[roger]

You don't have to worry about the screws but if your box is that far back you will need a box extender of some type.

Roger

 

[spark master]

I'm not worried, I'm curious .......

 

[roger]

I'm not worried, I'm curious .......

Well to ease your mind ground screws aren't even listed.

Note, UL doesn't approve anything, they simply list or recognize items.

Roger

 

[kwired]

I'm looking at a plastic switch plate cover, and it has the little UL symbol.

What about device screws, are they UL approved as well ?
What if I take out the short screws, and install 3" long screws for a marble back splash? Do I need to get UL approved screws ? :?

I think you can no longer use something like a drywall screw for such extensions, which works pretty conveniently with plastic boxes, has to be machine thread screw, this would be from NEC

 

[spark master]

So they list a plastic non-conductive wall plate cover, but they don't list screws ???

 

[Coppersmith]

non-conductive

Exactly.

 

[kwired]

UL logo is stamped between threads, you need a magnifying glass to see it

 

[al hildenbrand]

I'm looking at a plastic switch plate cover, and it has the little UL symbol.

Sorry, edit to say I misread the OP.

Switch plate covers supplied screws are probably part of the listing.

Device screws, supplied with the device are also probably tested and evaluated with the device under it's rating.

However, I agree that most "fasteners" are not listed by a NRTL. The classic example has already been given above . . . the lowly ground screw for enclosures is not listed, nor does it have to be colored

 

[kwired]

I'm looking at a plastic switch plate cover, and it has the little UL symbol..

Sorry, edit to say I misread the OP.

Switch plate covers supplied screws are probably part of the listing.

Device screws, supplied with the device are also probably tested and evaluated with the device under it's rating.

However, I agree that most "fasteners" are not listed by a NRTL. The classic example has already been given above . . . the lowly ground screw for enclosures is not listed, nor does it have to be colored

If said screws are critical to the listing, they should be mentioned in the white book shouldn't they?

 

[al hildenbrand]

If said screws are critical to the listing, they should be mentioned in the white book shouldn't they?

IF they are critical . . .

Depends what the actual NRTL standard says, along with any other requirements from other regulatory sources.

Turn it around and consider how one would evaluate a cover plate or device without the fasteners it is designed to be installed with?

 

[kwired]

IF they are critical . . .

Depends what the actual NRTL standard says, along with any other requirements from other regulatory sources.

Turn it around and consider how one would evaluate a cover plate or device without the fasteners it is designed to be installed with?

We discard the screws that came with the device and use those that come with a raised cover, unless those have been lost, then we use whatever we may find that will "get 'r' done"