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BS EN60335-1:2002 cl15.1& u8 S& e6 a3 O% ?, T, \; O
For IPX4 appliances, the horizontal centre line of the appliance is aligned with the pivot axis
6 f: r! }# p6 s+ f& E& {8 sof the oscillating tube. However, for appliances normally used on the floor or table, the
6 W- q4 |0 u- xmovement is limited to two times 90° from the vertical for a period of 5 min, the support being# O# x0 d6 H q8 I& P: J
placed at the level of the pivot axis of the oscillating tube.
% c( d K: d# ~2 PIf the instructions for wall-mounted appliances state that the appliance is to be placed close to7 I- G s1 b2 l k
the floor level and specifies a distance, a board is placed under the appliance at that
6 S" [9 _7 n/ i5 p2 \+ `8 gdistance. The dimensions of the board are 15 cm more than the horizontal projection of the
+ I0 F& r1 _4 T$ p9 R2 @8 Eappliance.
, B0 q* |) l8 A' n3 r/ L1 {Appliances normally fixed to a ceiling are mounted underneath a horizontal unperforated
% e b' h9 j. \support that is constructed to prevent water spraying onto its top surface. The pivot axis of the
; L, g8 o n7 s! _. Z' Zoscillating tube is located at the same level as the underside of the support and aligned* o' ^& e! U M% S W
centrally with the appliance. The spray is directed upwards.
5 B+ m8 m- r2 hFor IPX4 appliances, the movement of the tube is limited to two times 90º from the vertical for
8 K g( F Y- la period of 5 min.
( n& r$ s6 v: k; G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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