Padvault & Flat Pad Information for Suppliers

Vault suppliers please review our detailed vault requirements below. These documents apply to Rocky Mountain Power underground distribution systems.

If you are a vault or flat pad manufacturer, and your company wishes to become a PacifiCorp-approved supplier, see the detailed requirements defined in PacifiCorp’s Underground Material Specifications posted below, and send an e-mail to with the following information:

  • Company name
  • Contact person
  • Website
  • E-mail address
  • Address
  • Phone number
  • Service area / locations for delivery
  • Types of vaults produced
  • Any attachments relevant to your product(s)

PDF Procedure 251 - Padvault Manufacturer Approval Process

PDF GV 001 Equipment Bases and Enclosures – General Information

PDF ZG 301 General Equipment Base and Enclosure Requirements

PDF ZG 311 Concrete Requirements

PDF ZG 321 Non-concrete Requirements

PDF ZG 421 Single Phase Sectionalizing Box Pad

PDF ZG 501 Padvault — Single-Phase Residential, 4'x4' (48"x48")

PDF ZG 521 Padvault – Three-Phase Transformer

PDF ZG 532 Flat Pad - Three-Phase Transformer

PDF ZG 551 Padvault - Three-Phase Fusing Cabinet

PDF ZG 562 Padvault, 7’ x 12’ (94” x 155”), for 600-Amp, Dead-Front Switchgear

PDF ZG 616 Padvault--4' x 6' (48" x 72")

PDF ZG 621 Padvault - 5'x7' (56”x 84”), for Three-Phase, Sectionalizing Cabinets and Metering

PDF ZG 622 Padvault – 7-Foot by 9-Foot (84"x108"), for Three-Phase, 15kV Padmounted Switchgear

PDF ZG 631 Manhole--7-Foot by 7-Foot (84”x 84”)

PDF ZG 641 Vault--Shallow, 7-Foot by 7-Foot (84” x 84”)

PDF ZG 701 Manhole--7-Foot by 12-Foot (94" x 155")

PDF ZG 711 Vault--Shallow, 7' x 12' (94" x 155")

PDF ZG 715 Sleeve--15, 25 and 35 kV, 600-Amp, Deadfront Switchgear, Padvault

When creating a vault, approved suppliers shall also follow local waste control and compaction regulations for the installation location.

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