/ q/ x3 k z9 M* g" w4 g下面这些都需防火外壳: 4 k* B* a9 O" I% `6 u– components in PRIMARY CIRCUITS;$ s8 C/ a) Y' N: f+ X% e
– components in SECONDARY CIRCUITS supplied by power sources that exceed the limits$ F) ~6 y, S6 } t
specifie in 2.5; 2 T! f" t5 R. U6 h– components in SECONDARY CIRCUITS supplied by limited power sources as specifie in/ t6 k; l! q: F- f; W$ B8 f6 p
2.5, but not mounted on material of V-1 CLASS MATERIAL; $ f5 s$ R4 g& q1 ?5 d* Z; I( y– components within a power supply unit or assembly having a limited power output 3 O" d' a2 S6 y, x4 ?& R/ ~as specifie in 2.5, including overcurrent protective devices, limiting impedances,: h# `0 Z- x" o4 D8 }
regulating networks and wiring, up to the point where the limited power source output 0 _1 f* L& M$ k2 {0 _& \8 Lcriteria are met;: o' O; z4 k5 g% I+ o
– components having unenclosed arcing parts, such as open switch and relay ) N+ C5 }: p1 D' G+ Bcontacts and commutators, in a circuit at HAZARDOUS VOLTAGE or at a HAZARDOUS ENERGY2 R2 V8 Y, Z( s5 v
LEVEL; and w( j' B; l1 q' c2 A' r
– insulated wiring.作者: sherryxj 时间: 2013-6-22 21:14
要看你的产品是哪类别的,ClassI/ClassII/ClassII