UL recognized

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roger

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This is from a manufacturers literature.


GENERAL TECHNICAL INFORMATION:
? Since electronic transformers operate at a high frequency (22,000 Hz) a volt meter
or amp meter which operate at a lower frequency (15,000 Hz) may not accurately
measure the voltage from an electronic transformer. The only way to test an
electronic transformer, to determine if it is working properly, is to apply a wattage
load which falls within the specified range.
? Even though filters are utilized to minimize RFI, some electronic noise could be
present. If this occurs try to rotate the transformer to minimize the interference,
or replace the unit with a magnetic transformer.
? Switching should be done on the primary (120V) side only.
? Primary draw from the transformer = 0.5 amps.
? Secondary current output = 5 amps.
? UL recognized.

My question is, what does ? UL recognized. mean as far as meaning anything? :confused:

Is it included just so the UL mark is visible, and may slide by as meaning listed? Maybe I'm just uninformed.

Roger
 

bennie

Esteemed Member
Re: UL recognized

Roger: This mark is saying...This product meets UL requirements, don't blame us if it does not meet yours.
 

tom baker

First Chief Moderator
Staff member
Re: UL recognized

UL recognized -backwards UR- is a product that is incomplete in its testing, and is designed to be used in a assembly that would have an overall UL listing, such as a industrial control panel that would be UL 508 listed.
 

roger

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Staff member
Location
Fl
Occupation
Electrician
Re: UL recognized

Thanks Bennie and Tom.

So really it is included just so the UL mark is visible, and may slide by as meaning listed? :D
 
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