Seaward Supernova XE - Manual (Page 89)

Substitute Leakage Test
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supply plug. The Tester displays the resistance measured and allows
the user to confirm sufficient insulation exists.
For Class 2 appliances, the Earth Bond Test clip can be used for an
earth return lead.
For appliances which incorporate over-voltage protection, a 250V DC
test voltage is provided to allow a reading to be taken without the
protection devices generating a false failure.
Substitute Leakage Test
The substitute leakage test applies a nominal voltage of 40V AC RMS
to the appliance and is applied between the earth pin and both the
live and neutral pins of the supply plug. For Class II appliances,
connect the Earth Bond test clip to the appliance as a substitute for
the Earth.
The Tester measures the current that flows and scales the result to
display a guide to the current that would flow if the test voltage had
been the nominal mains supply voltage, scaled for the applicable
socket.
Please note that values for Substitute Leakage may differ
substantially from that of conventional Earth Leakage tests because
of the way that the test is performed (e.g. it will be affected by the
presence of Neutral-to-Earth suppression capacitors).
This test can prove useful in situations where neither conventional
Insulation nor Flash tests are acceptable methods of testing the
insulation of the appliance.
IEC Lead Test
This test confirms the electrical safety of 230V IEC leads.
The IEC test performs a continuity and polarity check on the Live and
Neutral conductors and confirming that there are no breaks or cross
wiring in these conductors.