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That's normal, and definitely comply with UL's listing mark requirements.
5 U, ]/ Y Y4 H- t+ m; \. A- jFor UL listed products: 4 elements is the necessary requirements:
1 c% m, N" j( V- p! E1. "UL" with a circle;
) G0 W; _9 r% T& u2 o4 P7 G8 p2. "Listed";/ S, s1 E0 |3 T, t
3. Product identity: Receptacle;# \% b+ c! Y* Q' j$ h$ j& S* O
4. Control No.: 264B(normally 4 digi-characters)
* k3 ?8 j. Q7 m7 N @5 K# B! k2 b# r0 D! `
So the mark you concerned does comply with UL requirements, and the UL file No. is not a necessary element, and its UL FUS procedure also should describe the requirements as it indicates.
9 k3 I5 Y2 ?! e' N! y3 c8 [ t/ `& m
As to the standards, I can not remember it, but could be UL498 or UL1977... |
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