Century UL 1086 Manual page 54

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33.4 If a conductive surface other than metal is used for the enclosure or part of the enclosure, the
leakage current is to be measured using metal foil having an area of 10 by 20 centimeters in contact with
the surface. If the surface has an area less than 10 by 20 centimeters, the metal foil is to be the same
size as the surface. The metal foil is not to remain in place long enough to affect the temperature of the
appliance.
33.5 The measurement circuit for leakage current is to be as illustrated in Figure 33.1. The measurement
instrument is defined in (a) – (c). The meter that is actually used for a measurement need only indicate
the same numerical value for a particular measurement as would the defined instrument. The meter used
need not have all the attributes of the defined instrument.
a) The meter is to have an input impedance of 1500 ohms resistive shunted by a capacitance of
0.15 microfarad.
b) The meter is to indicate 1.11 times the average of the full-wave rectified composite waveform
of voltage across the resistor or current through the resistor.
c) Over a frequency range of 0 – 100 kilohertz, the measurement circuitry is to have a frequency
response – ratio of indicated to actual value of current – that is equal to the ratio of the impedance
of a 1500-ohm resistor shunted by a 0.15-microfarad capacitor to 1500 ohms. At an indication of
0.5 or 0.75 milliampere, the measurement is not to have an error of more than 5 percent at 60
hertz.
HOUSEHOLD TRASH COMPACTORS - UL 1086 FEBRUARY 1, 1996