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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:8 O7 _' z* u( T3 f- S
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;& _# ~! r. b, J+ c( [" H+ w9 n
另外在Clause 12.1下的兩項Exception No.1 and No. 2;
# }9 [3 m g: h! k' X% N4 V' M12.1 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.
4 z$ L4 @$ |. S! e' J, \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).3 {" ~5 `7 U: l4 |" ^
Exception No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.% y2 s2 C3 J: i9 ]) y4 b0 o
$ B7 E7 ?$ z2 h& q3 u r1 B1 ]Table 12.1 Cord sizes' } g- f. w" w0 D' u- R9 v- ~
Adapter input fuse rating, Amps Minimum cord conductor size, AWG
/ }( N3 U" Y0 c' i10 A and less 18a
$ c2 ^' p! S6 f- _12 17
3 C, M* {& H7 e! v/ I4 e% K# k13 165 D, X q: i0 c9 h# c1 P( n- G# ]
18 14" D5 O1 l0 ~2 H8 z% s, N/ Q
20 12# K" H" T) O. E: {, b: l
Remark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits., C8 a0 k* a- R- N/ D% }3 ]/ @
# W, C/ }9 h, @/ `/ T
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;: G3 a( v; u7 T+ Z7 j
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;
8 t( }1 l; _8 w0 ]( @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?& @( y6 ?+ v* x0 R5 S( R) e
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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