|
關於車載充電器UL2089,閱讀在條文中有提到對線材的規定:+ L& I0 v0 v5 p$ j* ^- l1 Y
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;
* ]8 M8 _& C2 h) {6 r 另外在Clause 12.1下的兩項Exception No.1 and No. 2;
& B; F* o+ A# D: F' N0 ^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.
& S' D, R4 Q) b2 R" P+ w, Y0 ]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).
4 B0 W2 r/ R0 e% q0 E- Y- t- c# uException No. 2: For units rated 10 A or less, an equivalent style appliance wiring material (AWM) may be employed./ A: p3 `7 C+ b4 A
* P( }% {/ Q( g; p
Table 12.1 Cord sizes9 G( z0 P G/ S2 U& P
Adapter input fuse rating, Amps Minimum cord conductor size, AWG& i7 ]3 Q1 \9 W; g
10 A and less 18a5 M2 {5 F, z4 Q, D6 y0 u- ], s
12 17+ {/ W; |" Y9 `
13 16
# U: d5 |* e$ M0 M' r U, M4 b18 14
9 M) \7 j$ {, I20 12
; ]8 w; @% E& q. h+ c1 sRemark a: Size not specified for conductors in Class 2 or Low Voltage Limited Energy Circuits.
. b- _, w" x1 ~' P9 i" H) u l9 X$ r1 h/ b+ [4 Z, D' r9 j
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 b- h! d( `: d' A5 F4 [
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;) R1 H1 n( ]4 N: N, R h1 n; \0 s
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?9 S; H3 K& {$ 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) |
|