This guideline covers recommendations for the selection@ handling and installation of underground single bore rigid nonmetallic conduit (RNC) or raceway for power@ lighting@ signaling@ and communications applications. For this guideline@ RNC refers to PE@ PVC or RTRC conduit and duct. Corrugated coilable utility duct is not covered in this guideline; details on storage@ handling@ and installation are covered in NEMA TCB 3. Guidelines for HDPE conduit are covered in NEMA TCB 4. Although not specifically mentioned in this guideline@ variations of the products discussed may occasionally be specified. Users should follow installation recommendations of the manufacturer.