RMP Underground Conduit System Installation Guide (Procedure 242)

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13 Padvaults - Customer ResponsibilityThe drawings and pictures in this section represent typical installations. If you haveany questions about any drawing or picture, please contact the Power Company.ProcedureFigure 13 shows properly installed equipment on padvaults.Switchgear on a Pad VaultThree Phase Transformer on a Pad VaultFigure 13 - Switchgear and Three Phase Transformer on a Padvault13.1 Padvault DimensionsThe Power Company will provide the stock item number and dimensions with the jobestimate.Pad vaults are used support switchgear in 600-ampere applications, and three-phasetransformers with four or more conduits on the secondary side of the transformer.Pad vaults may also be required in other select non typical 200-ampere applications.A pad vault is a two-part concrete box consisting of a pad and an open vault. Padvaults are used with closed conduit systems.J:\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. 56
ProcedureFigure 13.1 – Padvault13.2 Excavation – PadvaultsPad vaults are designed to be set such that the top of the pad is three inches abovethe final grade in non-pedestrian areas and flush with the final grade in pedestrianareas. Pad vaults should be level and supported by six inches of ¾-inch-minusgravel backfill, compacted to 90% of dry density, placed over undisturbed earth.Figure 13.2 - Excavation – PadvaultJ:\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. 57
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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 and 60: 11.2 Excavation - Secondary BoxNote
Page 61 and 62: 12 Concrete Flat Pads - Customer Re
Page 63: 12.2 Excavation, Flat Pad - Three P
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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