|
|
關於車載充電器UL2089,閱讀在條文中有提到對線材的規定:
- s E E( w+ @4 y/ V1. 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;' G( C; [5 S( i. S
另外在Clause 12.1下的兩項Exception No.1 and No. 2;
; Y% E1 B) y! b) W9 W8 I% p12.1 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., {' e) i; i5 w0 F
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).) j; _; _# v% K/ l3 ~! ?
Exception No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed.
% Z# x- ~/ i, @# J
6 {: e- d1 b& R, OTable 12.1 Cord sizes4 s4 ^7 A: T; t O# L1 i
Adapter input fuse rating, Amps Minimum cord conductor size, AWG4 C4 U7 Z) V# l9 s
10 A and less 18a& W5 X' [/ T. \
12 17! }% S# @3 V$ p( f
13 16
) ~6 n9 G4 O* ]18 14/ d; x5 \7 u9 T
20 12
$ v8 i7 r% w* WRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.4 _( E! p% J# h! t) p
: E( S9 r0 S1 A8 V$ ~) Q* m" H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; M6 |1 o% A0 X( p
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;
- i: n) r! ]: [/ ^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 {9 K8 r. H* H/ 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) |
|