UL Listed

Northwest Envirofan
File: E68698
Project: 88RT2693A
Issued: 03-03-89
Current: 03-19-97
Page T1-7 **


METHOD: The fan was mounted as intended and connected to 120 v, 60 Hz source of supply of an isolating transformer. The fan was operated at low speed. The leakage current meter was connected between the appliance frame and the supply with means for switching to either side of the supply. The fan was then subjected to a simulated driving rain for a period of four hours during which, and for one-half hour after cessation of the rain, the leakage current was monitored. When the rain was shut off the fan was also stopped using a switch in the control circuit. A Dielectric Strength Test, 1,000 V for one minute, was conducted immediately after cessation of the rain and one-half hour later. (Test set-up was in accordance with Section 36, UL 507, Sixth Edition.)

RESULTS: Passed. The “as-received” sample, maximum leakage current, was measured at 0.175 milliamps. During the rain the maximum leakage current was measured at 0.175 milliamps, and after the rain cessation and for one-half hour later, the maximum leakage current was 0.18 milliamps. There was no dielectric breakdown immediately after the rain test and there was no dielectric breakdown one-half hour after the rain test. After one-half hour, the maximum leakage current was recorded at 0.165 milliamps.

Page T1-4 **


METHOD: A sample of the appliance was heated to a temperature just above 34 C. for six hours to reduce the likelihood of condensation of moisture during conditioning. The heated sample was then placed in a humidity chamber and conditioned for 48 hours in air having a relative humidity of 88 +/- 2 percent and at a temperature of 32 +/- 2 C. Following the conditioning, the sample was then subjected to a Leakage Current Test which was continued under the leakage current until the leakage stabilized or decreased. Following the Leakage Current Test, the Dielectric Voltage Withstand Test was repeated

RESULTS: Passed. The leakage current was measured at 0.076 milliamps. There was no dielectric breakdown as a result of the applied potential.

** copied word for word in its entirety by Northwest Envirofan