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fasten 发表于 2019-1-19 09:39
~6 u. A. f6 r0 \# a; l) F42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ...
49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 8
' S( k6 W! y5 |6 o! r# h3 l) Uinches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial9 |+ a8 J. r/ ?( |6 I' g2 W) L
center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles
3 u) j* {; q& R* fper minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,
( h4 Z2 v. |$ W& U% b) E) e* m, \resulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of
$ k8 @+ _+ G; P5 R# A z0 D* sthe sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as0 w# d8 U7 {& ~0 j8 b9 O
received″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The
& n( Q* `5 H$ ^/ @! Cconditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
& Y8 C6 ^( N: r7 @flexing.
5 J! G, R7 f" c) ?8 G8 L" YException No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,
0 f$ R; w9 y+ e7 f/ \adjusted such that the cord is held taut and the intended flexing action is produced.6 o' |; n9 C" K# s, Q
Exception No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater% b4 a4 g' s/ e3 H$ E
than specified& y) R9 W( M9 U; t- M( U. C- n
% k8 m* @. n7 K+ y' ]这里只是描述测试方法，没说转尾在线上吧？ |
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发表于 2019-1-19 09:39