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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:! E, O* h) z: M' F1 F0 t* Z; V! P
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;
H3 d. w, M& Z- d$ l' f7 U5 A+ T 另外在Clause 12.1下的兩項Exception No.1 and No. 2;
+ v- c, ^, ^- l$ ~ q( A+ a12.1 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.
# R6 B# n9 Y6 V- ~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).6 ]- d/ J8 X. q4 }! c% P" O& a
Exception No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.
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Table 12.1 Cord sizes X1 L7 V$ P+ y: |6 _2 \* e
Adapter input fuse rating, Amps Minimum cord conductor size, AWG) T+ m. H' I/ f; l' X
10 A and less 18a! f2 l7 T: t7 ]) Q6 M0 H3 M! ~
12 17
- p N, ^! {$ [ Z& M$ P8 c5 e7 J: Y13 161 a' c$ v( f' G, u6 b+ m' J
18 14
3 F5 B' H" o& i0 M7 z8 G; c$ E20 12* `# C- Z5 H. x8 Y) Z3 Z
Remark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.
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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 |! u. u6 z9 K8 j6 R1). 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;
0 f% }. X+ J" l& k6 r2). 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?4 F1 H5 G6 l5 Y1 X5 |4 ]
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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