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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:
2 d( }, ?" k- t& N* S5 X1. 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;0 U; G$ s7 m' L0 \: U6 u4 l) j
另外在Clause 12.1下的兩項Exception No.1 and No. 2; 1 I- A% o: U! O" K2 t$ y b
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.! a" L$ X/ \) S3 {4 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).
* z: u) `, ^; v9 u. K+ x0 KException No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.6 }" V B+ u0 S& X, C: F
3 x. z) T+ z7 x5 J9 oTable 12.1 Cord sizes
0 ^ y! F6 z* ZAdapter input fuse rating, Amps Minimum cord conductor size, AWG
) \$ {! e* C7 }, b' D# e2 Y10 A and less 18a$ {" F( q/ p$ b5 p' T
12 17
! g( Q5 n' s# S. L' B6 v$ C13 16
& P' U; d% p# z4 K1 N8 h6 Z18 14
% s0 _% Y0 z; ~8 d. T20 12$ a" m/ O$ q7 Z( o) l
Remark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.% m) J3 _8 P9 w3 Y4 S
+ V* C. R, v) I7 p1 e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;
* ^; P& g2 W2 s1). 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;- P$ R5 G, m9 f! X8 G5 Z/ f
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?
( V0 p* c7 }0 A; r0 t4 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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