UL COPYRIGHTED MATERIAL –
NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
DISTRIBUTION WITHOUT PERMISSION FROM UL
Table 52.1
Temperatures, oven-aging
Maximum temperature during normal temperature test of
surface to which applied
Oven temperature
°C °F °C °F
60 140 or less 87 189
80 176 or less 105 221
100 212 or less 121 250
125 257 or less 150 302
150 302 or less 180 356
Over 150 Over 302 a
a
A label that is applied to a surface attaining a temperature greater than 150°C (302°F), during the normal temperature test, is
to be oven-aged at a temperature representative of the temperatures attained by the appliance during normal and abnormal
operation.
52.4 IMMERSION TEST – Three samples of the label, applied to test surfaces as in the intended
application, are to be placed for 24 hours in a controlled atmosphere maintained at a temperature of 23
±2°C (73 ±4°F) at a relative humidity of 50 ±5 percent. The samples are then to be immersed in water for
48 hours at a temperature of 21 ±2°C (70 ±4°F).
52.5 STANDARD ATMOSPHERE TEST – Three samples of the label, applied to test surfaces as in the
intended application, are to be placed for 72 hours in a controlled atmosphere maintained at a
temperature of 23 ±2°C (73 ±4°F) at a relative humidity of 50 ±5 percent.
52.6 UNUSUAL CONDITION EXPOSURE TEST – If the labels are exposed to unusual conditions in
service, such as oil, grease, cleaning solutions, or the like, three samples of the label applied to test
surfaces as in the intended application are to be placed for 24 hours in a controlled atmosphere
maintained at a temperature of 23 ±2°C (73 ±4°F) at a relative humidity of 50 ±5 percent. The samples
are then to be immersed for 48 hours in a solution representative of service use maintained at the
temperature the solution would attain in service, but in no case less than 23 ±2°C.
MANUFACTURING AND PRODUCTION TESTS
53 Dielectric Voltage-Withstand Test
53.1 Each converter shall withstand without electrical breakdown, as a routine production-line test, the
application of a potential at a frequency within the range of 40 – 70 hertz, between the primary wiring,
including connected components, and accessible dead metal parts that are likely to become energized,
and between primary wiring and accessible low-voltage (42.4 volts peak or less) metal parts, including
terminals.
53.2 The production-line test shall be in accordance with either condition A or condition B of Table 53.1.
53.2.1 A dc potential of 1.414 times the rms value of the ac potential specified in Table 53.1 may be used
instead of the ac potential.
53.2.1 added January 27, 1995
JANUARY 27, 1995 UL 458 71
To Next Page
Loading...