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UL's Marks -- What they look like and what they mean
There are several types of UL Marks, each with a specific meaning and
significance. You may have seen many of these Marks on the products you
purchase at local retailers. If you work in the construction industry, you
have seen them on thousands of types of building materials. Since you're
reading this page on the World Wide Web, you're using a computer, screen
and modem that may carry one of UL's Marks.
It's important as consumers that you be aware of the safety marks on
the products you buy. The only way to determine if a product has been certified
by UL is to look for the UL Mark on the product itself, not the packaging
or store display. Only products that have had samples evaluated by UL, found
to meet our requirements, and checked by our field team at the manufacturing
facility are eligible to carry the UL Mark.
By looking for the UL Mark on your products, you can become a smart member
of the UL Safety Team. Read on to see some of the most common types of UL
Marks, a short explanation of their meaning and a listing of some of the
types of equipment you might find with these Marks.
UL Listing Mark
This is one of the most common types
of UL Marks you will see. If a product carries this Mark, it means that
UL found that samples of this product met UL's safety requirements. These
requirements are primarily based on UL's own published Standards for Safety.
This type of Mark is seen commonly on appliances and computer equipment,
furnaces and heaters, fuses, electrical panelboards, smoke and carbon monoxide
detectors, fire extinguishers and sprinkler systems, personal flotation
devices like life jackets and life preservers, bullet resistant glass, and
thousands of other products.
C-UL Listing Mark
This mark is applied to products for
the Canadian market. The products with this type of mark have been evaluated
to Canadian safety requirements, which may be somewhat different from U.S.
safety requirements. You will see this type of Mark on appliances and computer
equipment, vending machines, household burglar alarm systems, lighting
fixtures, and many other types of products.
Classification Mark
This mark appears on products which
UL has also evaluated. Products carrying this mark have been evaluated
for specific properties, a limited range of hazards, or suitability for
use under limited or special conditions. Typically, products Classified
by UL fall into the general categories of building materials and industrial
equipment. Examples of types of equipment Classified by UL include immersion
suits, fire doors, protective gear for fire fighters and industrial trucks.
C-UL Classification mark
This Classification marking
is used for products intended for the Canadian marketplace. It indicates
that UL has used Canadian standards to evaluate the product for specific
hazards or properties. Examples of C-UL Classified products include air
filter units, firestop devices, certain types of roofing systems, and others.
Recognized Component Mark and Canadian Recognized Component Mark
These are marks consumers rarely see because they are specifically used
on component parts that are part of a larger product or system. These components
may have restrictions on their performance or may be incomplete in construction.
The Component Recognition marking is found on a wide range of products,
including some switches, power supplies, printed wiring boards, some kinds
of industrial control equipment and thousands of other products. Products
intended for Canada carry the Recognized Component mark with "C".
International "emc-Mark"
The International
"emc-Mark" appears on products meeting the electromagnetic compatibility
requirements of Europe, the United States, Japan or any combination of
the three. In the United States, some types of products can't be sold without
proof of compliance to U.S. electromagnetic compatibility requirements.
The types of products that are subject to EMC testing include medical and
dental equipment, computers, microwave ovens, televisions, radios, transmitters,and
radio-controlled equipment.
Food Service Product Certification Mark
The UL Food
Service Product Certification marking appears on food service equipment
that UL has evaluated for sanitation hazards. This type of equipment includes
gas and electrically powered food service products as well as items without
a power source such as plastics. These products are commonly found in commercial
food establishments, institutional food services and other locations.
Field Evaluated Product Mark
The Field Evaluated Product
Mark is applied to a product that is thoroughly evaluated in the field
instead of UL's laboratories or the manufacturer's facility. If a product
has been significantly modified since its manufacture or the product doesn't
bear any third-party certification mark, a building owner, a regulatory
authority,or anyone else directly involved with the product can request
that UL conduct tests in the field on the specific piece of equipment.
Products that meet appropriate safety requirements are labeled with a tamper-resistant
Field Evaluated Product Mark.
Facility Registration Mark
The UL Registered Firm Mark
is a mark you will never see on a product. Instead, it indicates that a
particular facility has passed UL's evaluation to quality assurance standards
and is used in promotion and marketing by companies with quality assessment
programs audited by UL. The standards UL uses are the ISO 9000 series of
quality assurance standards and QS-9000, the quality standards developed
by the Big Three U.S.automakers for their suppliers.