An HT1730 type 17 inch by 30 inch traffic rated concrete pullbox with an extension and steel diamond plate lid is set into finished grade with a surrounding concrete collar. The assembly is bedded in sand and native backfill, with a twelve inch layer of Class A or Class C backfill below. Single-bend galvanized rigid steel conduits without fittings route wiring from handhole HH-3 into the pullbox and onward to the panel rack. Below-grade splices are executed using crimp-type butt splices enclosed in waterproof shrink covering.
NEW ASPHALT NATIVE BACKFILL NATIVE SOIL 12" CLASS A OR CLASS C BACKFILL FROM HH-3 SAND SAND. FINISHED GRADE SINGLE-BEND GRS (NO FITTINGS) TO PANEL RACK 1. 2. 3. NOTES: HT1730 TYPE, 17 INCH X 30 INCH, TRAFFIC RATED CONCRETE PULLBOX, EXTENSION, AND STEEL DIAMOND PLATE LIDE. INCLUDE COVER BOLTS AND ACCESSORIES AS REQUIRED. MARK COVER TO READ 'ELECTRICAL'. ELECTRICAL HANDHOLE TO HAVE HEAVY DUTY BOLT-DOWN LID RATED FOR HEAVY EQUIPMENT (H25). ALL BELOW-GRADE SPLICES SHALL BE ACCOMPLISHED USING CRIMP-TYPE BUTT SPLICES WITH WATEPROOF SHRINK COVERING. PROVIDE CONCRETE COLLAR AROUND HANDHOLE LID
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