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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:3 i, L; e0 w, S5 X {0 y" I9 p
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 \6 ^3 a- B( G A3 u1 ^( R; Z
另外在Clause 12.1下的兩項Exception No.1 and No. 2; 1 s4 d' w( q) c; C3 s4 W
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.# O& T* N0 j( _2 s
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).; V" c; v- f4 s
Exception No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed., T; @5 }' C8 Y, P2 T- t9 d8 k
+ a1 O3 }- q; U* K7 N; ZTable 12.1 Cord sizes
n) c$ v- m6 c9 W8 HAdapter input fuse rating, Amps Minimum cord conductor size, AWG
0 T* q& V5 _0 V4 D( i, c% F10 A and less 18a
( A+ W% h- R3 b( `12 17" E6 W+ i Q6 F; f" U0 R) f
13 16
+ q4 A1 z8 E5 K" w0 N18 14
6 z/ S7 i# o- x1 N# m+ ^20 12
5 u% d3 Q4 p) V/ C4 T. G9 jRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.# @1 `0 }5 \1 S0 q9 h# E
8 q6 S& m: L7 T4 o& m$ s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 [* \- J/ w# U1). 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;
3 I2 s8 z; w% A6 Y; U# v2). 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?: }# G7 S. G0 |* o( c4 F
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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