|
大部分标准只显示18AWG 以上的(比如UL507,但其也是摘录NFPA 70),所以等待高手提供22AWG以下的载流量的标准依据,也许是大部分产品的内部引线都有标准规定不低于AWG及其长度的限值,所以可以承受比较大的电流,而对于电源线则需要根据产品的额定参数来选择对应的AWG。
. F6 L& X/ c' z) w. N. J/ E; |! w* }4 Z% l$ l3 Q3 s
NFPA 70 National Electrical Code 都查不到24AWG与22AWG的载流量,可参考以下:
7 a4 Y& q) W: Q* z0 D. ]
" e: C! q* C ^, o6 b% j( p! A2 F, _& Y( e! T4 t
*Tinsel cord.& a" a1 ~' o1 p2 \
**Elevator cables only.
: b* E7 A) g2 S0 _) T***7 amperes for elevator cables only; 2 amperes for other types.
. ~9 Z/ r3 @" c7 L$ i+ g/ t1 T+The allowable currents under Column A apply to 3-conductor cords and other multiconductor cords
; I' d# ~' l1 o% e/ P8 Nconnected to utilization equipment so that only 3 conductors are current-carrying. The allowable currents- M9 m1 T8 y, `+ P- X' e6 i
under Column B apply to 2-conductor cords and other multiconductor cords connected to utilization equipment
" d% z, P% i! Z* r4 ~/ pso that only 2 conductors are current carrying.7 A) N! n" }3 m/ G% k
|
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有帐号?注册安规
x
评分
-
查看全部评分
|