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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:6 X0 ?4 j4 T4 M: P3 A
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;
6 e* H/ L2 X: r) ? 另外在Clause 12.1下的兩項Exception No.1 and No. 2;
0 [1 T' `2 c1 v12.1 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.
- r% P, w ? Q& F8 \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 c/ M, i# L2 l, t" t" u: v$ DException No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.; b8 _) a7 ?& w" I5 V& @
; o: x: {; q8 k2 r3 A n8 DTable 12.1 Cord sizes
& H! m& a! U+ o& @+ c& G$ j" G& ?! `Adapter input fuse rating, Amps Minimum cord conductor size, AWG
; r l! h# B" f# O' U, P10 A and less 18a( P: C, s( D) d, y, V4 a- V; k
12 17+ }/ C5 O/ k7 E
13 161 e7 K8 H" i. b. s6 c
18 14
. q5 R) T/ _, N! g# ?20 12
3 g, ?& h# i2 ]) O) k+ g: `, ? GRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.
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9 {* I9 X) p% [# w' ^ X5 x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;6 }- k+ q2 H @4 d& x. f
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;: A3 ~7 p# a. ] [2 j; ]5 Z$ Y
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?
! s M6 N) W9 R! n9 J% a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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