60335单层内部线绝缘是否一定不可以当加强绝缘？

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IEC60335试验指甲

根据60335最新版标准条款23.5最后一句， 单层内部线绝缘不提供加强绝缘：
0 e# R+ L' p, s23.5 The insulation of internal wiring that is subjected to the supply mains voltage shall withstand the electrical stress likely to occur in normal use.

- [6 f  ]5 H" F9 ]$ n$ lThe basic insulation shall be electrically equivalent to the basic insulation of cords complying with IEC 60227 or IEC 60245 or comply with the following electric strength test.
* l; ^8 y/ _# u' N; Q+ V3 IA voltage of 2 000 V is applied for 15 min between the conductor and metal foil wrapped around the insulation. There shall be no breakdown.
NOTE 1 If the basic insulation of the conductor does not fulfil one of these conditions, the conductor is considered to be bare.
3 G  f: M4 b1 U9 i! y' P& fNOTE 2 For class II construction, the requirements for supplementary insulation and reinforced insulation apply except that the sheath of a cord complying with IEC 60227 or IEC 60245 may provide supplementary insulation.
A single layer of internal wiring insulation does not provide reinforced insulation.
; ]# q8 {: h/ f" }, `2 k/ G
* @3 p4 ^, V4 N/ A

7 [. r4 d; F2 P假如单层内部线绝缘的厚度达到了2mm, 也不可以当加强绝缘吗？表示极度疑惑。
. z  v8 ]( L( z: l; B+ r

ylgc123

现在标准的说法是不行ed5.1之后就明文规定了~