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have some part which not clear,so have a help.& _2 F- y- M- w" v* J) e
For portable light,please the following information(form UL153):% A! \8 q2 o& y
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6 x8 Z0 @# H- T$ T0 c8.4 When wires pass through a joint between sections of a portable luminaire that are separable for* ~: d W9 j, s% b- L, X
packing purposes, the joint shall be such that rotation of one section with respect to the other during the+ S7 U7 C9 J6 o/ |& J& i% R) g
assembly of the sections is limited to not more that 360 degrees. Friction alone does not meet the intent9 ~ {) C# {9 T# f; ^
of the requirement to prevent rotation.) f* ~! m& j0 N0 k
Exception: When all of the following conditions exist, rotation between sections of a portable luminaire is
+ F' e, P6 O) v$ nnot limited to 360 degrees:
3 W3 G X+ o( O8 ^a) The internal diameter of the tubing through which the wires pass is 1/2 inch (12.7 mm) or
- L" `9 i& `1 ~; \& P0 cmore or the Power Supply Cord Twist Test, Section 135A is conducted with acceptable results;9 o3 ]$ q! {0 s9 f1 r9 w
and' B) D: v5 X# s* Z# l4 s/ o) v
b) The rotation during assembly is limited to not more than one revolution for each 3 inches (763 g7 W* a1 I% W8 m! V- F* ?
mm) of unobstructed tubing length through which the wires pass, when such rotation does not k: v- j" M$ [
place any stress on the conductors; and7 n* i+ u5 L V) n0 \# D# c1 T/ R0 P
c) The conductors do not involve splices unless the splices are:
" A( p# t6 a; I$ a+ S. v1) Inaccessible during assembly in accordance with Accessibility of Live Parts, Section
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2) Secured and provided with strain relief that has been shown to be reliable and not" G. @1 b- q% U/ A3 ` k7 U1 P3 F7 D* G
easily defeated by the user.)
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有款落地的灯,它是由LAMP BASE,THREE TUBES,LAMPSHADE组成,为了方便装,分开来安装,只要用户按照说明书去安装,在这里就关系到线的问题,TUBE与TUBE 联接之间,就会导致线会旋转360 度,并且线径是小于12.7mm,在此想问一下如何解决这个问题。如果做了电源线扭曲测试,就不能免温升吗。。。请各位大侠提出意见。。。THANKS。。。( W( w/ B/ B+ y9 M6 @* X6 Q# B+ K4 K
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