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|  DSH 508
7 C$ i2 ?* [/ @: F- X
4 c5 m H* q' U1 L/ d | Moisture resistance
; f0 G" u" p' l, @) k, S" \ f | 15.1.2+ s' t, [" a) ^5 o7 M) o [/ N
| 60335-1(ed.3)
7 B* F! R' d; G' y; E* l |
! a3 a$ b; B% g# bQuestion:- J4 n! T5 t$ {% }4 O
What are the test conditions for appliances that are normally ceiling mounted ?$ g& i, |% z9 q& h; U+ V) n
Rationale:
% J) N# ?% Q3 R5 [ y QSee question.
9 n* ^5 X9 \% {Decision:6 d- D, a6 j( W
Ceiling mounted appliances are mounted in accordance with IEC 60335-1/1991, sub-clause U0 M; ]1 P! {: A z; @! ]' V' G
15.1.2, as for appliances fixed to a wall. Ceiling mounted appliances are mounted in their
6 n- s! E, O8 p+ h4 P/ Z* g, x$ Roperating position. The rear part shall be covered and sealed around the mounting plate.
9 ?5 L' B+ g# `! k" k5 U, A1 ]The requirements for IPX4 are checked in accordance with IEC 60529, sub-clause 14.2.4.
! w% E) a4 ]7 f, \/ h% w3 aThe requirements for IPX3 are checked in accordance with IEC 60529, sub-clause 14.2.3,- t8 `1 ], |4 _3 c. k
but the oscillating tube is oscillated as for IPX4, detailed in IEC 60529, sub-clause 14.2.4.
# i" V5 r9 n( I) n* y6 xAlternatively, IPX3 and IPX4 requirements can be made using figure 5 of IEC 60529.
0 O- b8 g1 K0 nIPX2 requirements are not applicable for ceiling mounted appliances.1 u( y+ s6 s9 R
9 g7 i: m7 ^. ]& F
7 J$ Z9 F# k& ]1 ]
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发表于 2012-9-9 17:23
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