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PN 074-550-P1D
SQC-310 Operating Manual
Never interrupt the protective earth circuit.
This symbol indicates where the protective earth ground
is connected inside SQC-310.
Never unscrew or loosen this connection.
Disconnecting the protective earth terminal or
interrupting the protective earth circuit, whether inside or
outside of SQC-310, may render SQC-310 dangerous.
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