请教: 木的材料能当补充绝缘吗?
在2类灯中,线扣把单绝缘线压在木上,接受吗? 木材不能做为绝缘材料用的！ 引用第1楼susansun于2007-09-02 13:13发表的:木材不能做为绝缘材料用的！
这个问题我也很想知道，能指出在标准什么地方描述吗？ 电木算不算木材啊,另外,楼主的线是内部线吗?电源线会有单绝缘的? 电木实际是一种塑料的俗名,并不是木材.所以电要是绝缘材料. 1.2.23
class II luminaire
luminaire in which protection against electric shock does not rely on basic insulation only, but in
which additional safety precautions such as double insulation or reinforced insulation are
provided, there being no provision for protective earthing or reliance upon installation
conditions.
NOTE 1 Such a luminaire may be of one of the following types:
a) A luminaire having a durable and substantially continuous enclosure of insulating material which envelopes all
metal parts with the exception of small parts such as nameplates, screws and rivets which are isolated from live
parts by insulation at least equivalent to reinforced insulation. Such a luminaire is called an insulation encased
class II luminaire.
b) A luminaire having a substantially continuous enclosure of metal, in which double insulation is used throughout,
except for those parts where reinforced insulation is used because the application of double insulation is
manifestly impracticable. Such a luminaire is called a metal-encased class II luminaire.
c) A luminaire which is a combination of types a) and b) above.
NOTE 2 The enclosure of an insulation-encased class II luminaire may form a part or the whole of the
supplementary insulation or the reinforced insulation.
NOTE 3 If earthing is provided to assist starting, but is not connected to an accessible metal part, the luminaire
may still be deemed to be of class II. Accessible metal parts in compliance with the appropriate IEC lamp
specification and other metal parts not normally earthed and not normally accessible during normal use are not
regarded to be conductive parts which may cause an electric shock unless the tests of Annex A show them to be
live parts.
NOTE 4 If a luminaire with double insulation and/or reinforced insulation throughout has an earthing terminal or an
earthing contact, it is class I construction. However, a fixed class II luminaire intended for looping-in may have an
internal terminal for maintaining the electrical continuity of an earthing conductor not terminating in the luminaire,
provided that the terminal is insulated from accessible metal parts by class II insulation.
NOTE 5 Class II luminaires may have parts in which protection against electric shock relies on operation at safety
extra-low voltage (SELV). 照此看来，软电线，在要国标还是可以浸锡的了，但就是不能再用这种接线端子接了（是用螺丝来锁紧的） 引用第0楼John于2007-09-02 12:09发表的 请教: 木的材料能当补充绝缘吗? :
在2类灯中,线扣把单绝缘线压在木上,接受吗?
这个问题原来我也问过，在灯具的标准里没有具体的哪一条可以说明：木材不能作为绝缘材料
只有一条：载流部件不能直接接触木材！
当然，从安全的角度考虑，木材是不能用作绝缘材料的，经过特殊处理的除外！ 大家看看相关的CTL决议，可能对这个问题有帮助，转述如下：
Question: 1) In case a luminaire has decorative wooden parts in contact with current carrying
parts, can it be accepted?
2) Can wood be used as insulating material? (For class III luminaires too)?
Decision: 1) Not acceptable.
2) Wood can be accepted as supplementary insulation, if all relevant
requirements of the standard are comply with.
这是IEC 60598-1(ed.5)关于4.11.5的决议。具体内容我不翻译了，应该看起来没有问题。 因为木材在湿度状态下会受潮而带电,故不能用.
页:
[1]
2
