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发表于 2011-12-7 16:20
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附UL2556标准相关章节:/ u4 X5 A' S0 j' z1 m
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4 Insulation and jacket materials tests4 |0 i6 [ E( I5 {" r- N
4.1 Thickness5 v5 A1 Y" N- p& R
: d7 W8 ^9 o1 u. f1 U2 x& B3 T4.1.4.2.1 Averaging method
# f- F1 R+ m A' T- [- W/ j9 h$ t0 mThe minimum and maximum thickness shall be determined using the procedures described in Clause6 j5 ]2 y- h4 V1 r, P6 N2 w" y( W
4.1.4.1.1 or 4.1.4.1.2. For insulation, measurements shall be made within the irregularities resulting from" F$ t6 ?% ~, R
conductor stranding. For extruded-to-fill jackets, all measurements shall be made within the irregularities
8 u/ r" F( M9 _1 e2 q* W! jresulting from the conductors. If the pin described in Clause 4.1.4.1.1 does not fit within the irregularities,' x: S, n$ ?6 z+ S9 d
this method is not applicable. |
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