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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:
7 ?1 P7 S: @1 D1. 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;& w; d/ |& ~7 }5 N2 r
另外在Clause 12.1下的兩項Exception No.1 and No. 2; $ c) n, k/ Q% R& r: q3 q
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.
# B* [, a6 E) U* M* mException 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).6 p: T6 a" n# Z
Exception No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.: p0 T7 b# h! c$ B3 ?9 _$ W4 f
! w! J% A1 ]5 m1 h9 LTable 12.1 Cord sizes/ }) z; ^5 f" R& G' h+ T1 N! o
Adapter input fuse rating, Amps Minimum cord conductor size, AWG
! {! g+ K. R! O# n- i' x1 m10 A and less 18a
3 i) Z* o, i e& X0 Q. S9 [12 17
+ l* l& j3 l0 ~13 16
0 A3 g/ B* A& y18 14# l* } U/ T" M9 n# D2 F% }
20 12
- ^ E: i' D$ ]" ]0 _4 LRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.
- K& Q K& C2 o$ V+ o7 N9 T
& y: Z7 D8 u6 ?/ {9 j! e2 B' C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;. X, ?, B0 n5 Z$ ~( t
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;# V0 n' @( B6 w5 q
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?/ }: _4 b( k; v$ I
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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