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+ n/ u8 O" o/ k! r% Q0 IQuestion:
6 g" i5 B$ u( P$ K6 rWhat are the test conditions for appliances that are normally ceiling mounted ?; N& g i5 u5 s# g5 {( B
Rationale:
# O' I' o; A9 S0 \# QSee question.3 v B& r- q2 p5 W$ d
Decision:
: q7 x8 I. @* O. C' Y* _Ceiling mounted appliances are mounted in accordance with IEC 60335-1/1991, sub-clause
0 c; @9 V6 `# X8 Q: z" |- M) o15.1.2, as for appliances fixed to a wall. Ceiling mounted appliances are mounted in their( d: q9 p* K& ~" F- E% F
operating position. The rear part shall be covered and sealed around the mounting plate.; Y( i5 ]' E1 g4 h
The requirements for IPX4 are checked in accordance with IEC 60529, sub-clause 14.2.4.
% }* s2 E1 p# r7 V! s dThe requirements for IPX3 are checked in accordance with IEC 60529, sub-clause 14.2.3,! z1 `* I' k! D2 {+ x
but the oscillating tube is oscillated as for IPX4, detailed in IEC 60529, sub-clause 14.2.4.
& k4 n3 b/ L8 R' l( FAlternatively, IPX3 and IPX4 requirements can be made using figure 5 of IEC 60529.+ _/ L2 ?/ }1 \
IPX2 requirements are not applicable for ceiling mounted appliances.
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, Q k9 {7 }% I8 w' M8 `* w" S, L) z+ ?. G6 S( I r1 v
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发表于 2012-9-9 17:23
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