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BS EN60335-1：2002 cl15.1& D( v. L D# q$ X
For IPX4 appliances, the horizontal centre line of the appliance is aligned with the pivot axis7 a/ Z- t! S3 k+ E4 L
of the oscillating tube. However, for appliances normally used on the floor or table, the. p- k0 y# u9 }. \; _
movement is limited to two times 90° from the vertical for a period of 5 min, the support being
$ w% H( j3 a" X, ~+ N) [placed at the level of the pivot axis of the oscillating tube.# ~9 P+ p* J' Y# V% m# F
If the instructions for wall-mounted appliances state that the appliance is to be placed close to# a& P6 p) U! Z+ }8 P
the floor level and specifies a distance, a board is placed under the appliance at that
) R* |/ k/ f* g( \) Tdistance. The dimensions of the board are 15 cm more than the horizontal projection of the
4 E% W. I1 D K/ N; H( Iappliance.* r0 l/ Z1 Z+ b# ?2 H/ R
Appliances normally fixed to a ceiling are mounted underneath a horizontal unperforated
" w" q$ b- R# g- N0 ~. Ksupport that is constructed to prevent water spraying onto its top surface. The pivot axis of the# c5 n$ u, R$ d4 U
oscillating tube is located at the same level as the underside of the support and aligned$ g+ Z/ j6 f0 P) \/ u1 V
centrally with the appliance. The spray is directed upwards.: f4 e- Q6 P# G+ k
For IPX4 appliances, the movement of the tube is limited to two times 90º from the vertical for# L+ B. s9 a- F/ k; V
a period of 5 min.) y! e5 j3 M1 M* y: G( n
标准写的很清楚角度应该是左右各90度。那个正负180是指的一个周期 |
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