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I HOPE THE FOLLOWING EXPLAIN WILL BE USEFUL FOR YOU: i" l" r: N; r* C1 T2 I/ o# O/ ]
9 V1 w; T4 `' Q! F- [The UL Listing Mark is the most common certification mark seen and accepted by
( w1 W1 o/ N% a0 b2 x4 Zcode authorities. Products bearing the UL Listing Mark are usually either complete3 O5 x9 Y& ], X% p) ^
appliances, or equipment and materials that are intended for installation in accordance with5 }2 |" t4 m% Z2 U
model codes such as the National Electrical Code® (NEC®). These products have been$ E( c+ |6 v- A! \
investigated using applicable construction and performance requirements, and when installed
; t! n! }3 p Q* x% Cin accordance with the manufacturer’s installation instructions, should provide a safe,
9 e- M$ U0 Y, v* o8 G9 ocode-compliant installation. The UL Guide Information for each product category typically2 ^0 W4 u+ S& t: G _; K0 {: U3 e) s
identifies the applicable installation code.Comparing UL Listing and Component
- p7 f& Z& k, P/ _3 ]- WRecognition is like comparing a car and an engine. A car is a finished product, and an' a4 H" r$ u% X1 p
engine is a necessary component. However, not every engine is compatible with every& j6 {. T6 B2 H B2 k+ N' d o# B
car. The same is true for UL Recognized Components, which will not be compatible
5 ]) K- ^, H# {! swith all end-product equipment applications. UL’s Listing evaluation of an end product
; g: P& S+ v" a% C- c: i$ ]includes 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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