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Date Posted: 09:54 09/18/09 Fri
Author: Phil DiCesare
Subject: UPS grounding

According to an equipment manual for our Liebert Uninterrupted Power Supplies for our IT and telecom systems they require an extra grounding conductor attched to the frame of the units (8AWG). They quote articles, 250-5d, 250-81, 250-83, and table 250-94. I don't see anywhere in these section (some which don't exist) the requirement. Has anyone heard of this requirement?

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