RMP Underground Conduit System Installation Guide (Procedure 242)

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Notes:For each conduit run:•2’ of trench left open•90° elbow permanentlyattached to each conduit runExcavation depth should be 10” plus thesize of the largest conduit (3” – 4”).2'LegendOpen ExcavationBackfillConduit3/4” minus leftfor levelingProcedureNot drawn to scale4'TrenchConduit90° elbow2’4'Figure 11.4.1 - Top View - Secondary BoxNotes:All conduits need to come up into the center of theexcavation where the pad box will be placed.The Power Company will cut the elbows as needed.Final GradeMinimum depth =10” + conduitdiameterFigure 11.4.2 - Side View - Conduit Placement - Secondary BoxJ:\Publications\FPP\DIS\PRO\242-RMP Underground Conduit Systems.docx R6, 5/13/14This document is posted online at rockymountainpower.net, and at engineering’s intranet site for distribution procedures.Modification of this document must be authorized by PacifiCorp engineering publications, (503) 813-5293. 52
12 Concrete Flat Pads - Customer ResponsibilityThe drawings and pictures in this section represent typical installations. If you havequestions about any drawing or picture, please contact the Power Company.The left picture in Figure 12 shows a properly installed three phase transformercabinet. Flat pads are limited to three phase transformers with no more than threeruns of conduit on the secondary side.ProcedureToo many conduits on the secondaryside for a flat pad. A vault should beused.Three Phase Transformer on a Flat PadFigure 12 - Three Phase Transformer Flat PadJ:\Publications\FPP\DIS\PRO\242-RMP Underground Conduit Systems.docx R6, 5/13/14This document is posted online at rockymountainpower.net, and at engineering’s intranet site for distribution procedures.Modification of this document must be authorized by PacifiCorp engineering publications, (503) 813-5293. 53
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ProcedureUnderground Conduit System
Page 7 and 8:
Figure 6.5.2 - Joint Use Separation
Page 9 and 10: Underground Conduit Systemsfor Prim
Page 12 and 13: Any conduit system or any part of a
Page 14 and 15: ProcedureFiberglass conduit and swe
Page 16 and 17: 2.2.7 Conduit ProofingAll undergrou
Page 18 and 19: The following list of requirements
Page 20 and 21: ProcedureFigure 2.3.6.1 - Joint Use
Page 22: A padvault is a two-part concrete b
Page 25 and 26: 3.4 Secondary BoxesSecondary boxes,
Page 27 and 28: ProcedureFigure 4.2 - Clearances be
Page 29 and 30: Company is required to return to th
Page 31 and 32: 6 Installation Guidelines - Conduit
Page 33 and 34: 6.3 Installing Conduit through Pave
Page 35 and 36: 6.5 Joint Use SeparationFor joint u
Page 37 and 38: 6.6 Transition from Overhead to Und
Page 39 and 40: • Site accessibility. The site lo
Page 41 and 42: ProcedureFigure 7.6.1 - Barrier Pos
Page 43 and 44: 8 Three Phase Sectionalizing Cabine
Page 45 and 46: Notes:For each conduit run:•One 4
Page 47 and 48: Notes:For each conduit run:•Leave
Page 49 and 50: 9.2 Excavation - Single Phase Secti
Page 51 and 52: 3” Final Grade6-10”3 - 6”45°
Page 53: ProcedureFigure 10 - Single Phase T
Page 57 and 58: 10.4 Power Company Installs Pad Box
Page 59: 11.2 Excavation - Secondary BoxNote
Page 63 and 64: 12.2 Excavation, Flat Pad - Three P
Page 65 and 66: ProcedureFigure 13.1 - Padvault13.2
Page 67 and 68: Pad vault must be set at proper ele
Page 69: UG CONDUIT SYSTEMS Rev. 6 May 2014E
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RMP Underground Conduit System Installation Guide (Procedure 242)

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