GE HEALTHCARE
DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL
Chapter 10 - Care & Maintenance 10 - 13
10-7-2 GEHC Leakage Current Limits
The following limits are summarized for NFPA 99/UL2601-1/UL60601-1 (for USA) and IEC 60601-1
Medical Equipment Safety Standards. These limits are GEHC standards and in some cases are lower
than the above standards listed.
NOTE: *Mains Applied refers to the sink leakage test where mains (supply) voltage is applied to the
part to determine the amount of current that will pass (or sink) to ground if a patient contacted
mains voltage.
The following tests are performed at the factory and should be performed at the site. These tests are:
grounding continuity, chassis leakage current, probe leakage current, and ECG leakage current. All
measurements are made with an electrical safety analyzer.
Table 10-12 Chassis Leakage Current Limits—Accessible Metal Surfaces
Country Normal Condition Open Ground Reverse Polarity Open Neutral
USA
N/A
0.3 mA 0.3 mA N/A
Other
0.1 mA
0.5 mA 0.5 mA 0.5 mA
Table 10-13 Type BF Patient Leakage Limits - Non-Conductive (Floating) Surface and Cavity
Probes
Country
Normal
Condition Open Ground Reverse Polarity Open Neutral *Mains Applied
USA
0.1 mA
0.5 mA 0.5 mA 0.5 mA 5.0 mA
Other
0.1 mA
0.5 mA 0.5 mA 0.5 mA 5.0 mA
Table 10-14 Type CF Patient Leakage Limits - Surgical Probes and ECG Connections
Country
Normal
Condition Open Ground Reverse Polarity Open Neutral *Mains Applied
USA
0.01 mA
0.05mA 0.05 mA N/A 0.05 mA
Other
0.01 mA
0.05 mA 0.05 mA 0.05 mA 0.05 mA
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