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fasten 发表于 2019-1-19 09:39: w8 `! v6 n- Q: C
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ...
& R. _$ D- [) h- S9 H/ K5 ~49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 8. C0 _ R( A. Z. p3 i' A
inches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial3 z9 X5 K; C( L3 [
center of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles: q, b" p: T9 x
per minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,
/ `7 y+ y/ X, s. y1 G+ I6 L+ ]9 ]resulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of7 K4 b B" X3 G( [
the sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as
" A/ I' e5 G. U6 J9 Ireceived″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The
1 k' G! |, i7 j, yconditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
5 J; T/ x p, Q! Kflexing.
, R% c' Y% {2 `* O+ j- Z1 IException No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,( _3 E+ `5 p$ n5 C' J! |" H3 `; h
adjusted such that the cord is held taut and the intended flexing action is produced./ v/ d+ h3 `: m
Exception No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater$ C% {4 l1 Z" J2 |9 {8 y
than specified
7 m+ g5 q, Q0 U( r3 d
" H: i2 ^% b; }' b/ w3 f$ ~( [这里只是描述测试方法,没说转尾在线上吧? |
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