裸露内部线
本帖最后由 hzd014250 于 2012-12-11 17:05 编辑各位大侠，美规标准下，我们有一壁炉产品是上下部分结构的，电源线是从下部分进入，然后连接到上面加热部分，在上下连接的内部线（加强绝缘）有一段是裸露在外可以触摸到的，且此内部线在进入上面发热部分五金外壳处没有加线扣固定，我想问下此裸露内部线和发热部分五金外壳处没有加线扣固定这种结构可以吗？没有加固定线扣那里会不会受到外界的拉力的影响？如果有受到拉力的印象，那受到多大力。或者说，要用线扣固定的话，需要经过多大的静力测试？ 对美标不熟，请指教！ 参考一下UL2021：
15.2 Protection of wiring
15.2.1 The wiring and connections between parts of a heater shall be protected or enclosed, except that
a length of flexible cord may be employed for external connections, or for internal connections that may
be exposed during servicing, if flexibility of the wiring is essential.
15.2.2 The internal wiring of a heater in the vicinity of a lampholder that accepts either an infrared lamp
or an ordinary lamp:
a) Shall be a jacketed type at least equivalent to Type SP-2 flexible cord. Asbestos-insulated
wiring and appliance wiring material is not acceptable unless provided with sleeving or tubing.
b) Shall be routed along the metal surface of the heater enclosure and shall be so secured as
to minimize the likelihood of its being hooked or grasped.
15.2.3 A conductor utilizing beads for insulation shall not be used outside an enclosure.
15.2.4 Internal wiring that is exposed through an opening in the enclosure of a heater is considered to be
protected as required in 15.2.1 – 15.2.3 if, when judged as though it were film-coated wire, the wiring
would be acceptable according to 7.17– 7.20. Internal wiring within an enclosure is acceptable if, even
though it can be touched with the probe, it is so protected or guarded that it cannot be grasped or hooked
in such a manner that it could be subjected to stress. 基本: 内部线不能碰到发热组件,运动部件(要固定),锐边,角 ,外部电源线进入电器端要有防拉装置(线扣,或压线码)经受35lbs 拉力. fasten 发表于 2012-12-11 16:50 http://bbs.angui.org/static/image/common/back.gif
参考一下UL2021：
15.2 Protection of wiring
15.2.1 The wiring and connections between parts of a heater shall be protected or enclosed, except that
a length of flexible cord may be ...
我这个是室内加热器 EVERGREEN21 发表于 2012-12-11 18:08 static/image/common/back.gif
基本: 内部线不能碰到发热组件,运动部件(要固定),锐边,角 ,外部电源线进入电器端要有防拉装置(线扣,或压线码 ...
问题是结构补允许加线扣，因为有太多线装不下 兄弟从你这个图片看上去，这个产品是由木架与发热器组装而成的，你的问题点是发热器的电源线怎么通过木架来达到产品的布线合理化，
只要考虑整体产品的电源线（即木架外面露出的线的拉力测试合格即可），至于木架里面的线，可以固定在木架上，不能接触发热器，避免产生脆化或老化，
过95n的拉力就好了
个人观点，仅供参考！ 图片不是全影图，但外露的线有固定的，并且进入器具内部的地方要防止被擦伤或磨伤。如果如LZ所说的那样结构不允许加固定装置，那就要考虑改善结构，使内部线不外露。（如果内部线外露就不能称为内部导线了，只能算是连接线了） fasten 发表于 2012-12-11 20:24 static/image/common/back.gif
我贴的条款难道是室外加热器的要求？看懂条款吧
UL2021标准 hzd014250 发表于 2012-12-12 09:38 static/image/common/back.gif
UL2021标准
UL2021有类似条款，已经给你更新，这一节基本都一样。 shinylee 发表于 2012-12-12 08:10 static/image/common/back.gif
图片不是全影图，但外露的线有固定的，并且进入器具内部的地方要防止被擦伤或磨伤。如果如LZ所说的那样结构 ...
如果线路板的排线/信号线也是内部的，但是裸露的，也算是连接线吗？
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