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clause 4.7 有提到 * _+ D& h( [" h" Z' C* W$ |" E5 P
Examples of methods deemed efficient to prevent a wire from becoming detached are:
: |% V+ L6 h8 t: s" ^a) wires are retained by a cord anchorage adjacent to the terminals;
8 ] V1 \9 q8 l9 R7 I2 ab) conductor is clamped by a spring type screwless terminal;
, p; F6 q0 Z) _4 O7 Pc) the wire conductor is anchored to the tag before soldering, unless breakage close to the soldering place is
E2 X0 N- h: N$ Slikely to occur as a result of vibration;! D5 _. x( O" F" T
d) wires are twisted together in a reliable manner;
z) U4 W+ i* }) A; U- H1 b/ Qe) wires are fastened together by insulation tape, sleeves, or the like;9 F' m+ M7 p% `
f) the wire conductor is inserted into a hole in a printed board, bent and soldered, the hole having a diameter
/ z( Q7 I, b! Y: uslightly greater than the conductor;
5 b: M; p& J) M: ]g) the wire conductor is securely wrapped around the terminal by means of a special tool (see Figure 19);) ]- U$ {+ v$ o8 q* U% `2 C* `7 f1 y6 @
h) the wire conductor is crimped to the terminal by means of a special tool (see Figure 19).% C1 c' j; y$ O1 _* X
The methods under a) to h) apply to internal wiring and the methods under a) and b) to rewireable external flexible- ~3 |* m5 ?- |" x' z5 F
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