|
( Y7 a, b" R/ ~1 C% g! o7 t28.2Electrical connections and connections providing earthing continuity shall be5 E! f, ?, |, b/ N+ v1 e2 O
constructed so that contact pressure is not transmitted through insulating material that is6 X- Z/ k: u1 s5 L! d" y% {( ?
liable to shrink or to distort unless there is sufficient resiliency in the metallic parts to
/ k5 S8 X7 f9 s' y; W4 n# `compensate for any possible shrinkage or distortion of the insulating material.
$ G- L' P6 \2 U$ U+ X8 i/ hNOTE Ceramic material is not liable to shrink or to distort.+ R, m) y# C0 d4 { Z! w
% T9 D% z! x$ R& M- y4 a3 C% D2 c' [- G4 D+ g
用塑料来达到这个要求恐怕很难,标准里说陶瓷可以满足要求。 |
|