DSH 431 Flexible shafts

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DSH 431 # T. d5 J! f$ V( c- A5 x" r: r 9 L. J  g& G* o9 N3 K

Flexible shafts

17, 17c) 1 l8 Q; y  x- L; u& D# w; U) G

60601-1(ed.2);am1;am2 % T5 J  \3 t- ]; K0 r$ Z( L" O

Standard(s)- (year and edition):
- r6 g& }9 E4 O+ O; w. tIEC 60601-1:1988 Ed.2 Am1+Am2
* a% b& c# E" ]8 }Sub clause(s): 17, 17c)
Sheet n°: DSH-431
Subject: Flexible shafts
; l1 f6 q# M; yKey words: Shaft, accessible, applied part
Confirmed by CTL at its 39th meeting, in Cologne
" c8 @& G8 K/ a7 N) g8 a2 C. }  X; GQuestion:
8 W9 ?) V! o# \  [: bHand held flexible shafts driven APPLIED PARTS may have parts of the flexible shaft which
2 r  H' p& T7 O, v! Jare accessible and not connected to PROTECTIVE EARTH.
This particularly applies to the termination of the flexible shaft which is normally of metal for
. K8 M! N& B2 X) ]& r" a( j0 [$ Ldurability and strength.
Decision:
Hand-held flexible shafts driving an APPLIED PART, e.g. Surgical or Dental drill, may be
0 q. t1 K: j/ p% B" n" h9 Vconsidered part of the APPLIED PART and therefore the requirements of Sub-clause 17c) will
9 e4 F4 b- v. i3 J2 u# Wnot apply to the ACCESSIBLE PARTS of that flexible shaft. 17d) shall apply
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