DSH 410 Use of DC supply

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DSH 410 2 A7 p# A( K. r8 o

Use of DC supply

16, 20, 19.2 & s# v6 |6 l2 Q: P% }8 u

60601-1(ed.2);am1;am2

Standard(s)- (year and edition):
) y" a: ?: v& i/ L; o3 bIEC 60601-1:1988 Ed.2 Am1+Am2
Sub clause(s): 16, 20, 19.2
: S: X- z4 @* D2 [2 vSheet n°: DSH-410
Subject: Use of dc supply
4 K, h+ H+ J0 o! \Key words: dc supply, enclosure
Confirmed by CTL at its 39th meeting, in Cologne
( g( S9 M! w! n) r: n* J0 M, G5 _Question:
" ?- T% @3 B6 i9 mSome EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.
/ }1 w' a. x7 P" F9 k7 Qsupply.with the negative side of the supply connected to the enclosure. Is this acceptable?
/ [1 X7 C/ i* y6 |Decision:
! Y! }7 \6 H& k+ e+ V  O- ~Connection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.
4 {' w/ H6 C1 K2 p/ AThe insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a1
and A-a2.
Note: Vehicle chassis is considered to be protective earth.


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