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I HOPE THE FOLLOWING EXPLAIN WILL BE USEFUL FOR YOU- y2 v4 v/ b+ x
1 |: M9 J( K: C3 C- v
The UL Listing Mark is the most common certification mark seen and accepted by/ S2 y9 {1 A' r" F& _
code authorities. Products bearing the UL Listing Mark are usually either complete
" |& m3 e( ]5 _9 O8 happliances, or equipment and materials that are intended for installation in accordance with+ g9 Z4 H! \: O8 v3 {. r7 z! b
model codes such as the National Electrical Code® (NEC®). These products have been2 ^ e: e/ M& s- r9 ~; `4 @
investigated using applicable construction and performance requirements, and when installed
/ l7 S) U/ C1 e* g5 Iin accordance with the manufacturer’s installation instructions, should provide a safe,
6 t( B' ]8 y. w8 t) ucode-compliant installation. The UL Guide Information for each product category typically
9 h6 F# b6 F5 Y b* u" n% k2 B0 Bidentifies the applicable installation code.Comparing UL Listing and Component5 Q ?! r |$ m( R) ]% q* a$ m y" N5 K" r
Recognition is like comparing a car and an engine. A car is a finished product, and an
1 j; |7 d# B- J* B1 Tengine is a necessary component. However, not every engine is compatible with every
0 F9 H( d0 V# g V1 m) ~6 |7 u2 Ucar. The same is true for UL Recognized Components, which will not be compatible5 _* z( e# p$ X2 p8 H
with all end-product equipment applications. UL’s Listing evaluation of an end product
$ n' q7 K. Z- p. i' wincludes an investigation of the construction and performance of all installed components. |
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发表于 2011-8-3 15:58
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