Electrical · E-99W66

Underground Utilities Warning Tape

Materials

Elements

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Detectable warning tape runs continuously from manhole to manhole, positioned a minimum of 12 inches above electrical conduits and underground utilities. The tape consists of a polyethylene film six inches wide and 0.004 inches thick with a minimum strength of 1,750 PSI, featuring a foil backing or wires for metal detector location up to a depth of 5 feet. Parallel runs are placed with one strip on each side of the trench spaced not less than 12 inches on center across the trench width. Three feet of slack is rolled up at each end inside the vaults or pullboxes and locations are recorded on as-built drawings. Color coding is specified as red for electric and orange for phone and signal.

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