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clause 4.7 有提到 : i- s- X d2 q/ G' y* ~# g: _% y
Examples of methods deemed efficient to prevent a wire from becoming detached are:( {: A: [4 Z2 m; U0 Z
a) wires are retained by a cord anchorage adjacent to the terminals;
5 t9 W V+ u0 D3 Db) conductor is clamped by a spring type screwless terminal;
; T" O- N( I! M) N# x: _c) the wire conductor is anchored to the tag before soldering, unless breakage close to the soldering place is* z( X: _6 e* m7 o9 P
likely to occur as a result of vibration;0 s: c5 w+ [4 \4 M; |
d) wires are twisted together in a reliable manner;1 N8 G* O- F7 j3 b, {1 V
e) wires are fastened together by insulation tape, sleeves, or the like; H/ C) e9 b l3 Z+ H0 \
f) the wire conductor is inserted into a hole in a printed board, bent and soldered, the hole having a diameter- y1 A" W7 g" m, W
slightly greater than the conductor;6 f0 J# a1 z' G! m7 ^, l3 E
g) the wire conductor is securely wrapped around the terminal by means of a special tool (see Figure 19);
/ b+ E3 F. q. c! q, q5 b# ]$ E7 hh) the wire conductor is crimped to the terminal by means of a special tool (see Figure 19)., B3 l/ j; [& z
The methods under a) to h) apply to internal wiring and the methods under a) and b) to rewireable external flexible# y& o( r% F+ D- @/ q7 x" {
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