Seaward Europa Pac Plus - Manual (Page 52)

Test Limits
46
Appendix
Test Limits
The following test values are recommended by the Institute of
Electrical Engineers as suitable limits for in-service testing in most
applications. Note that these are for guidance only, test engineers
must use their knowledge and common sense in each practical
application.
Earth Continuity Limit
The IEE ‘Code of Practice for In –Service Inspection and Testing of
Electrical Equipment’ defines the pass limit for earth continuity as:
< 0.1 + R*
* where R is the resistance of the protective conductor of the supply
cord –cables of 2 metre or less should be less than 0.1
Ω
Note that actual readings depend on good connection to the Earth
Continuity Clip and to the Earth Pin.
Insulation Resistance Limits
Appliance Class Insulation Resistance
Class I heating equipment with a
rating
≥ 3 kW
0.3M Ω
All other Class I equipment 1.0M Ω
Class II equipment 2.0M Ω
Class III equipment 0.25M Ω