Chapter 2: Electrical Safety Tests
LS 06311-002US Rev A
19
2.3
Earth Leakage and Touch Current
Earth Leakage Current is defined in IEC 60101-1 subclause 8.7.3. Measure Earth Leakage Current as
shown in Figure 2-4.
Figure 2-4 The measurement of earth leakage current (
Open the “APPIED PART” switch
)
Ensure that Resistance has been tested per §2.2 and Earth Leakages are also tested and meet
acceptance criteria prior to testing touch current. Personnel safety may be compromised if the
grounding conductor is not intact and the leakage (or touch) current is high.
Measure touch current as described below. Conditions of test include:
•
Normal polarity
•
Ground wire disconnected (SFC)
The cart is the only conductive surface accessible to the operator or patient when in normal use
position. Therefore, the touch leakage current is measured between the PE post located on the rear
of the cart and Grounding contact as shown in Figure 2-5.
