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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:
5 K! V1 k5 f* Y1. 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;
R; g! ?) J( d 另外在Clause 12.1下的兩項Exception No.1 and No. 2; 8 _" I$ t7 ?4 e/ T6 X
12.1 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.. Y$ E' n: F6 ~/ m
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).
( X6 v, m2 r/ ^$ [# OException 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
) _7 [' P' K" y2 E0 R; p$ i9 XAdapter input fuse rating, Amps Minimum cord conductor size, AWG
6 t) G& c; F7 \; F10 A and less 18a
+ z/ b8 u" p; G12 17! R, {; F. Q$ z; C3 ?& p
13 162 D! `0 o# W( ?" i0 j2 b
18 14
+ Z/ v M! S* k' p8 p6 M% A. C20 12
6 N! ]/ f6 I" f1 M$ X3 C- R$ kRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.- J0 f) W- d7 _; l) {( Z, H* m
0 P& ^2 j7 I* p$ S) @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;% a T6 E- x3 P$ d8 s* o/ I4 n
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;$ e; d' J* w) w& f" ]1 ^0 I
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?
, p' R7 L( w4 Q* W2 Z8 K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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