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Oct 31, 2017 · In a MDF or IDF there must be no less than two 4x8 foot fire retardant sheets of plywood mounted vertically side by side of one another and the minimum size for these rooms shall be 6’x 8’. All racks, raceways, and lightning protection must be grounded with at least a #6 awg and every telecommunication room must have either a ... ................
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