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Standard(s)- (year and edition):5 S4 H# w# M7 u/ x9 |
IEC 60601-1:1988 Ed.2 Am1+Am2, i( ^- d6 D5 Q& H$ z4 C0 D/ |* p
Sub clause(s): 16, 20, 19.2
7 O! e( Q$ t% dSheet n°: DSH-410
1 q* o* J4 d. QSubject: Use of dc supply
! k* N: i3 M7 `: K" eKey words: dc supply, enclosure
$ u! O* P3 |0 JConfirmed by CTL at its 39th meeting, in Cologne9 @( f, Z5 E" s! y
Question:
$ y" A8 b+ x7 ?4 z" wSome EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.: Y2 ]9 Q2 H; J7 W2 j1 g- o! Z
supply.with the negative side of the supply connected to the enclosure. Is this acceptable?3 |& P# P" W9 \! k
Decision:; ^$ m% w$ L( n3 Y. d. J3 ~1 _
Connection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.% Q; O" ]# E9 c) ^
The insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a1
- B/ { l3 n, Uand A-a2.
- B& B+ |. P9 lNote: Vehicle chassis is considered to be protective earth.3 ^5 Y8 N4 L5 N: ~ n, X! Y
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