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關於車載充電器UL2089,閱讀在條文中有提到對線材的規定:& u( g; b% c3 F) _
1. 只查到Clause 12 Flexible Cords有一些對線材的明確要求,規定了線材型號/長度和AWG Size Table 12.1;" h4 e6 G! C( f. F0 @
另外在Clause 12.1下的兩項Exception No.1 and No. 2;
7 B* H9 w5 o! D: l12.1 A unit shall be provided with a flexible cord and shall be type SP-2, SPE-2, SPT-2, SV, SVE, SVT, S, SE, SO, SP-3, SPT-3, ST, STO, SJ, SJE, SJO, SJT, or SJTO. The length of cord external to the unit and including the cigarette lighter connector shall not be less than 3 ft (0.9 m) as measured from the end of the cigarette lighter connector to the point of attachment or entry. Cord AWG size shall be in accordance with Table 12.1.0 e+ v! B9 S0 P" c+ k% Q9 s
Exception No. 1: Output wiring for Class 2 or Low Voltage Limited Energy circuits may be parallel cord insulated with rubber, neoprene, or thermoplastic having a wall thickness of not less than 0.013 in (0.33 mm).
$ q( V H4 k, e+ {! R$ M4 \Exception No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.
$ q' O- X2 {8 A. K& L! q0 a
9 g6 A9 E" F4 E ?' q% hTable 12.1 Cord sizes
1 h" H1 Y4 x; [! G7 j) fAdapter input fuse rating, Amps Minimum cord conductor size, AWG
# E! L! A' w1 P4 G10 A and less 18a! x6 f; e. ?1 u% q
12 17
6 h2 L2 C8 l' V; @8 h9 R0 g13 16
6 N; i# i/ ?* C18 14
/ {5 d6 W# h( s) E9 A6 z( A20 12
$ y. v. d% |. Z1 F$ e' H" S: E+ gRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.( W, o: g- e# n# @* r
; M5 O* Y" V, g6 F& a- X3 \這個標準我以前沒有做過,對於UL2089的要求不熟悉,同時我也有咨詢過幾位同行,對此看法不一;
" {7 E. Z3 S* P1). 有的認為既然標準沒有明確寫明是針對輸入還是輸出線的,那麼輸出線也參考這個標準;這樣非常痛苦,想象一下一個才5W約150g的產品拖一條18AWG SPT-2的線,不論是成本或形狀都讓有鬱悶;
- z4 v/ C: E- p) o2). 有人認為從條文來看主要是偏向於輸入線而不是輸出線,況且此類產品本身從輸入到輸出全是安全低電壓,輸入線考慮濫用會嚴格要求,但輸出線既然沒有規定可視為不做任何要求?6 [3 L7 J5 k! K+ e* l8 T
請教這方面的高手,假如我的產品輸入24V,輸出10V0.5A且滿足LVLE要求,在UL認證時會對輸出線怎樣評估才是合格?另外是否不論條文上有沒有注明,例如exception 1,所有UL認證設備中的線材必須是UL認證線才行?(如可行的話我打算用PU彈弓線,這种材質的線一般都是沒有UL認證的,最好用24AWG看是否有可行性) |
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