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|  DSH 410
' M9 u+ [, N2 x/ J) Y! Y4 ?/ I" G& }8 M9 ~! _' {5 u5 F5 L6 Y
| Use of DC supply
1 y$ ^, L. z: i% V" @* E! ~& p | 16, 20, 19.28 R4 L, u6 B) l& Q: P$ P. K$ P
| 60601-1(ed.2);am1;am24 { m9 g; R3 p* n- T6 d: z
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Standard(s)- (year and edition):1 A! m6 M/ F! m- n) p( N2 L( b" t
IEC 60601-1:1988 Ed.2 Am1+Am2
+ U* b( t, b H7 fSub clause(s): 16, 20, 19.2& A& t. \2 o- u2 f: W- j& O0 ^
Sheet n°: DSH-410
$ J. o4 b& X/ z$ TSubject: Use of dc supply9 q: g% e" D0 z) S
Key words: dc supply, enclosure
" \" r) ]9 q0 H, D" V& FConfirmed by CTL at its 39th meeting, in Cologne
+ _9 H% `' `5 A9 } WQuestion:( U' W+ ?) x+ h T" s& ^
Some EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.
9 f4 o9 j' B m" _supply.with the negative side of the supply connected to the enclosure. Is this acceptable?
2 p- l3 i( S5 w# T5 L4 nDecision:! x) Y8 T D, R: Q
Connection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.
! m9 A0 L+ j: R5 lThe insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a1
4 K6 ~( J7 V; z- v1 M: Y7 Fand A-a2.
' Y" U% T; C3 X; rNote: Vehicle chassis is considered to be protective earth.) c& |% [* }! u2 s: u7 [' Z- |( Q' `- r8 b
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