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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:- }% ]9 f" @7 T
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;4 F6 f: [) d2 O& U) b: |' ^
另外在Clause 12.1下的兩項Exception No.1 and No. 2;
0 r0 z' n" d N9 e12.1 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 12.1.5 _* w$ s4 r/ C" H& x. t( A
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).
! H! w: \5 T2 V. OException No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.
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9 J8 N+ F. i# F9 Q: r+ `Table 12.1 Cord sizes% Y2 X/ e; ]! ^5 T! k+ V0 |* p
Adapter input fuse rating, Amps Minimum cord conductor size, AWG
: ~/ Q& i3 h: f+ O10 A and less 18a3 V; [% h4 Q# A" b7 H4 d
12 17
$ n% S# H$ ?3 J7 e13 16
, F& x# a; P* \5 H0 E5 j n' ~! b18 145 o6 f$ i, |7 { o- a1 ]: H2 d
20 123 Y# ?7 g& O# r$ C: @. }$ D# W
Remark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.1 B, h4 G" {8 [, @1 _1 C2 w: \
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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;1 i: J! A2 f3 A2 [' H
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;; e- V7 j8 e8 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?+ S8 v- v) w- Y, 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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