Heat-Radiating Mechanical Parts: Labelling And Safety Instructions; Table 9. Iec 950 -Table 16: Over Temperature Limits, Part 2 - Alcatel 1850 TSS-320 Technical Handbook

A.2.7 Heat-radiating Mechanical Parts: labelling and safety instructions
The presence of heat-radiating mechanical parts is indicated by the following warning label in compliancy
with IEC 417 Norm, Fig.5041:
As stated by IEC 950 Norm., para.1.4.7 mechanical parts which carry the above pictured label and that
could inadvertently be touched, have a temperature T established by the following formula:
where:
T
amb
T
max
DT
mra
T

Table 9. IEC 950 -Table 16: Over temperature limits, Part 2

Operator-accessible parts
Handle knob, ect., held or touched for
short periods
Handles, knobs, ect., regularly held
Outer surface of the equipment that
can be touched
Inner surface of the equipment that
can be touched
DANGER! Possibility of personal injury:
procedures for installation / turn-up and commissioning / maintenance of equipment parts where heat-
radiating mechanical parts are present, described in the relevant installation / turn-up and commissioning
/ maintenance documents and the following general rule:
a) Personal injury can be caused by heat. Avoid touching powered terminals with any exposed part of
your body.
Technical Handbook Common
Safety - EMC - ESD norms and labels
amb max
(T-T ) ± (DT
Temperature of the mechanical part measured at ambient temperature
Ambient temperature during the test
Value defined by IEC 60950 Norm, Table 16 part 2a, para.5.1, and specified in
the table below.
The maximum room ambient temperature permitted by the equipment
specification or 25×C, whichever is greater.
Metal
35
30
45
45
mra
+ 25× - T )
Maximum over temperature (
Glass,
porcelain
45
40
55
55
carefully observe the specific
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01
amb.
T
°
C)
Plastic,
rubber
60
50
70
70
235/270