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clause 4.7 有提到 1 x# u+ V5 X! D, y
Examples of methods deemed efficient to prevent a wire from becoming detached are:0 J# O# D: X! `0 p% X
a) wires are retained by a cord anchorage adjacent to the terminals;: J. e& O9 v! b1 N/ D/ |
b) conductor is clamped by a spring type screwless terminal;
/ C3 p' h" \8 I/ l/ ac) the wire conductor is anchored to the tag before soldering, unless breakage close to the soldering place is7 p9 f0 ]# L" \1 @$ j( {
likely to occur as a result of vibration;' l5 w- S& a& t, w( b8 a
d) wires are twisted together in a reliable manner;8 U- Z0 A. N$ ?! [
e) wires are fastened together by insulation tape, sleeves, or the like;9 s+ ]5 C" c9 {* U- j
f) the wire conductor is inserted into a hole in a printed board, bent and soldered, the hole having a diameter7 p3 n$ R4 x' D
slightly greater than the conductor;2 o2 F+ p8 B6 Y! \2 z1 z# M
g) the wire conductor is securely wrapped around the terminal by means of a special tool (see Figure 19);! X* y9 B3 n& _+ H" Q" `
h) the wire conductor is crimped to the terminal by means of a special tool (see Figure 19).4 J+ L v5 ~/ c
The methods under a) to h) apply to internal wiring and the methods under a) and b) to rewireable external flexible C, X0 L! [0 G" u; r8 a
cords. |
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