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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:
( f/ h) }3 x) { z' ~2 L1. 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;- f2 v, a5 v3 ?
另外在Clause 12.1下的兩項Exception No.1 and No. 2;
7 Q T% A7 q% x- |* G4 T12.1 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 12.1.9 m+ q8 {. e' z9 Z( \3 S. x- P0 k
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)." v q; A, Y/ ]1 v) t# z
Exception No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.- A9 n, m9 F' J8 u
z, P5 S9 V/ d: s* O/ E# y
Table 12.1 Cord sizes
8 t X( T, S7 R) s5 A) |% xAdapter input fuse rating, Amps Minimum cord conductor size, AWG
0 ^- ]) e% u/ B4 ]/ ]2 m" d' R9 n10 A and less 18a
9 O- ^& x: i: c$ w$ ?+ ?' C12 17
: D5 g( g; i5 p- ?13 16
8 L2 R3 Y. x4 [1 ^18 14
. A# r7 t0 h `# p3 v( L20 12
0 h) z$ A" }2 N- S; J1 g% b( |' f, dRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.8 w6 J9 W/ N! L! u D5 z% e
3 Q3 r, R0 j, E* ?2 M1 ?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;# X u3 U( V& D$ c9 r
1). 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 l" W# v" N/ k% g B
2). 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?+ ]9 M+ T: Q9 ?3 a' w! 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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