4
Paragraph 10.2.13.4: Leakage
Current from Appliance to Ground
1.
Connect the LCT-601 to the EUT using
the female attachment plug cap pigtail.
2.
Connect the LCT-601 to mains power
using the male attachment plug cap
pigtail.
3.
Set the MEAS POINT Switch to the
CHASSIS MEAS POINT (left) position.
4.
Set the EARTH switch (second switch
from the top) to the EARTH-CHASSIS
CONNECTED (left) position.
5.
Set the NEUTRAL switch (third switch
from the top) to the NEUTRAL
CONNECTED position.
6.
Regarding the POLARITY switch; the
test is to be conducted with the
POLARITY switch in both positions.
7.
Connect a calibrated voltage meter
across the RED and GREEN LEAKAGE
banana plugs on the LCT -601. Set it to
read ~300uV for cord-connected
products, or ~5mV for permanently
connected products.
8.
Connect a lead between the RED
LEAKAGE banana plug on the LCT-601
and exposed grounded metal on the
EUT.
9.
If the EUT does not have exposed metal,
connect the probe to a 10x20cm metal
foil piece placed in contact with the
exposed surface of the EUT.
10. Regarding the power switch of the EUT,
the test is to be conducted with the EUT
power switch in both the ON and OFF
positions.
11. Read the current meter for all four
conditions above. A passing result is
<300uA
(<300uV on the meter
connected to the LCT-601) for cord-
connected products in the patient care
vicinity and < 5mA (<5mV on the meter
connected to the LCT-601) for
permanently connected products in the
patient care facility.
12. See Figure 2 and Table 2 for a Test
Setup synopsis. This section is based
on NFPA 99 Fig. 10.2.13.4.1, see below.
Please note the EUT in Figure 2
displayed a failing result.
Figure 2 Leakage Current from Appliance to
Ground
Table 2 Leakage Current from Appliance to
Ground
Jack/Switch
Position
FEMALE Cordset
To EUT
MALE Cordset
To Mains Power
RED LEAKAGE Jack
To voltage meter
and EUT chassis
GREEN LEAKAGE Jack
To voltage meter
RED RESISTANCE jack
N/C
MEAS. POINT Switch
CHASSIS
EARTH Switch
OPEN
NEUTRAL Switch
CONNECTED
POLARITY Switch
TEST IN BOTH
POSITIONS
EUT Power Switch
TEST IN BOTH
POSITIONS
PASS Result:
<300uA cord;
<5mA permanent
FIGURE 10.2.13.4.1 Test Circuit for Measuring
Leakage Current from Exposed Conductive
Surfaces.
Summary of Contents for LCT-601
Page 1: ...LCT 601 NFPA 99 Leakage Current Tester Instruction Manual COMPLIANCE WESTUSA...
Page 3: ...ii Rev 1 1 May 20 2005...
Page 15: ......
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