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WARNING
In order to test GFCI’s in a 2-wire system (no ground wire), the #61-175
ground continuity adapter must be used. Connect the ground lead on
the adapter to a ground, such as a metal water or gas pipe.
Optional Accessories
#61-175 Ground Continuity Adapter
This adapter allows the operator to verify that a cabinet or equipment chas-
sis has been properly connected to the power system ground. Plugging into
the #61-175 adapter will isolate the SureTest from the power source ground.
The Wiring Indicators of the unit will display a No Ground condition. If the
equipment is properly grounded, then touching the alligator clip from the
ground continuity adapter to the cabinet or equipment chassis should return
the circuit to a Normal condition.
WARNING
This is a static test and will not confirm the current carrying capacity
of the ground.
With the ST-1D, this adapter can be used to check the ground impedance of
a cabinet or equipment chasis. See the Ground Impedance Measurement
section for test instructions.
This adapter can also be used to test GFCI receptacles on 2-wire circuits.
Connect the ground lead on the adapter to a ground, such as a metal water
or gas pipe, prior to GFCI testing.
#61-176 Isolated Ground Adapter
This adapter allows the operator to verify that a receptacle is completely iso-
lated from the other grounds between the receptacle and the entry panel.
WARNING
The receptacle should be tested for proper grounding prior to testing
for ground insulation.
Test the ground impedance of the receptacle and make a note of the results.
See the section on ground impedance testing for details. Remove the
SureTest from the receptacle and plug it into the #61-176 adapter. Clip the
ground wire to the metal outlet, center receptacle screw, or the metal outlet
box. Press the display advance button, and re-insert the ST-1D into the
receptacle. Make a note of the result.
If the two resistance readings are the same, then the receptacle is not isolat-
ed. If the receptacle is isolated, the reading with the #61-176 will be lower.
A reading of half when the adapter is used is common, because a parallel
ground path has been introduced by attaching the ground wire to the
grounding point of the receptacle.
#61-177 Extension Cord
The ST-1 is supplied with an extension cord to make testing easier on hard-
to-reach outlets. Replacement extension cords can be purchased from your
authorized IDEAL distributor.
