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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:
1 `, n& h7 p* @' L3 M6 O+ 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;
8 z. {8 n9 L: W, o, t 另外在Clause 12.1下的兩項Exception No.1 and No. 2;
2 Q5 p2 l. D( J% J& N- K1 o; H' y12.1 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 12.1.2 D8 U" ?! n$ N# q/ T; b
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).. M) K: m9 |5 W: l- W0 {
Exception No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.
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( U8 h$ C4 e2 h- o G0 kTable 12.1 Cord sizes- A) g) c8 `! F3 C, K( z* V
Adapter input fuse rating, Amps Minimum cord conductor size, AWG% `/ l+ X9 U- C% j( q8 N
10 A and less 18a4 W3 S8 i& A j ]8 n8 a2 N
12 17
! ]; b. E' {9 m$ @; L" m5 u+ L, ^) l13 16
5 j4 ?$ i( ?6 }5 E) m x18 143 u/ U$ s7 u( x& d" Z
20 12
7 V. X8 @4 _* f3 g& i- aRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.8 X7 J5 ]% u4 _" ^8 s$ u6 _4 U
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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 s: I8 s+ C" V0 q. 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;. D' Z& |- ?$ A
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?
8 J; p& a8 \' F6 f1 M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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