Nisca PR53FS, Руководство по эксплуатации

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About connecting the grounding line
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Grounding line must be connected. If the
equipment is not grounded and there is
an electric leakage, it may cause electric
shock or fire.
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Grounding line may be connected to the following points.
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Grounding terminal on the electric outlet
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T he line connected to an copper rod which is buried in the ground at the
depth of 65cm(26inch) or deeper.
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Grounding line may not be connected to the following points.
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Gas pipe ( There is a danger of fire and/or explosion. )
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Water faucet or pipe ( It does not lead to the ground as plastic pipe
may be used. However, it can be connected if it is marked as possible
grounding facility.)
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Grounding line of telephone or lightning rod ( It is dangerous as large
e l e c t r i c c u r r e n t w ill run when hit by lightning. )