3.5 Pre-Test Inspection
46
(4) Polarity check results
The wiring may not be configured for uninterrupted polarity
switching. Check the wiring.
• The grounding wire may be disconnected.
• The power supply may be a floating power supply.
• The power supply may be a single-phase, 3-wire power
source.
The polarities of the power supply are reversed.
Reverse the L and N wire connections on [LINE IN].
See "Connecting the power cord of the equipment under test" (p. 33)
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