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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:4 B9 }6 x& i, `/ G7 _6 }' ^
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;$ k/ G: p( p7 X1 {
另外在Clause 12.1下的兩項Exception No.1 and No. 2;
, t- t& \* T+ m6 F- j12.1 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.
, L( p& V! m5 e- P6 b7 U+ c/ @: @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).0 v, t8 H3 L0 j9 |% Z
Exception No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.
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3 i7 j6 V* D* _; H! aTable 12.1 Cord sizes
Z# ]& S: X6 S8 K% b! j9 RAdapter input fuse rating, Amps Minimum cord conductor size, AWG, |/ T$ ]# p# T+ Y3 A. W; J) F
10 A and less 18a
7 Y0 Z+ r* o X p# o12 171 q' ?- s1 a. F8 [
13 16
) K( F# R: q) J) R18 14/ M! D1 X. u/ v8 h+ Q) k
20 12
; C/ Z4 q' }3 W( jRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.
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7 F, h6 N1 _. P- P* a4 W: S7 G! Z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;
! s" w- H# f' z9 F! I1). 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;7 T9 T( E: Y- `! Q0 Z9 x
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?* D# t" U# h9 d( |# O, L
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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