Earthing and Class I Appliances
Class I appliances and cables must always have an earth
wire tted for safety.
It is a critical safety feature of class I appliances and a class
I cable that the earth wire is connected.
As well as the insulation test the miniPAT will also verify that
the resistance between the earth chassis of the appliance
and the earth conductor (at the plug) connected to the
appliance is less than 0.3Ω (ohms).
If this is not the case, the earth bond LED will illuminate red,
showing a likely continuity fault between the earth at the
plug and the chassis of the appliance.
If the earth result is under 0.3Ω the earth LED will light up
green.
Overall Result ‒ Class I Appliances and Cables
When the insulation and the earth LED test results have
passed, the class I overall result LED will light up green,
showing that the appliance has passed the predetermined
tests.
Please note that due to the fact that this checker uses less
than 10V for its test, faulty voltage-dependent devices could
be undetected, such as surge protected extension leads.
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