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May 2010

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Subject:
From:
Drew meyer <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Drew meyer <[log in to unmask]>
Date:
Fri, 21 May 2010 06:26:15 -0500
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Inge,

Would you mean the Ground Fault Interrupter (GFI) outlet?  A fascinating 
device.  In simple terms in monitors the hot lead current flow and the neutral 
lead current flow.  If there is a small difference, I've heard 20mA as a number, 
the outlet is interrupted.  If 20ma more is flowing through the hot lead than 
the return it means that the current flow has found another way to complete 
the circuit.  The most likely path in that case is you! So if an outlet is within 
6ft of water or a potential location for water it must be protected by GFI.

Drew

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