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have some part which not clear,so have a help.! w* X( D7 d* h4 ~/ z
For portable light,please the following information(form UL153):
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8.4 When wires pass through a joint between sections of a portable luminaire that are separable for2 `- w: C3 \& N6 S9 J1 ~
packing purposes, the joint shall be such that rotation of one section with respect to the other during the0 F" I9 ^8 N- }" S8 h
assembly of the sections is limited to not more that 360 degrees. Friction alone does not meet the intent4 ?4 F" U1 o# K0 u7 O4 G5 L
of the requirement to prevent rotation." n' i9 Q" L$ A' ~3 D; N& J9 a
Exception: When all of the following conditions exist, rotation between sections of a portable luminaire is
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a) The internal diameter of the tubing through which the wires pass is 1/2 inch (12.7 mm) or
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and2 B4 ~1 U2 }" o$ N
b) The rotation during assembly is limited to not more than one revolution for each 3 inches (76
3 h R* a' }% i3 Smm) of unobstructed tubing length through which the wires pass, when such rotation does not1 |; x3 H7 D. r8 j {
place any stress on the conductors; and! v% `0 E! G! Z2 E. s: F) E1 `
c) The conductors do not involve splices unless the splices are:+ Z5 Z6 s- o% S7 F# l; U" m
1) Inaccessible during assembly in accordance with Accessibility of Live Parts, Section/ M( i. n, u8 x2 h# g: C2 c$ B- c
23; and
( R, P( ~0 M, a$ g# C9 j; d4 p2) Secured and provided with strain relief that has been shown to be reliable and not
6 Q- i, J) F5 ~& c: S" ceasily defeated by the user.)
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$ e. `1 F/ R7 s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。。。
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