RMP Underground Conduit System Installation Guide (Procedure 242)

4.3 Firewalls• The customer shall conform to all local building codes and/or ordinancesaffecting the equipment location.• Combustible/non-combustible construction types are defined byrespective state building codes.At locations where the space separation is inadequate to provide fire protection, afirewall may be constructed. The firewall shall be constructed such that the heat andflame from a dynamic event are deflected away from the storage tank.The firewall shall be approved by local authorities. Contact the Power Company forinformation on firewalls. Also see ESR White Paper 5—Firewalls athttp://www.rockymountainpower.net/esr.Procedure•Figure 4.3 – Typical Firewall4.4 Power Company Equipment in Enclosed SpacesThe Power Company requires 24-hour access to equipment in gated and enclosedspaces. If a single- or three-phase transformer, padmounted piece of equipment, orpedestal is to be placed in a gated or enclosed space, the Power Company shall begranted proper access prior to installation. For more information, see ESR WhitePaper 5—Gated and Enclosed Spaces at http://www.rockymountainpower.net/esr.5 Installation Guidelines – Trenches and BackfillThe customer is responsible for providing all trenches, backfill, and compaction. Thecustomer shall meet the requirements described in this procedure to complete constructionfor underground installation. The customer is responsible for ensuring that all conduitsystem installations comply with Power Company requirements.During development/construction, the customer is responsible for ensuring that allsubsequent contractors in the vincinity of Power Company facilities exercise care tomaintain the integrity of the conduit system (conduit and equipment bases). If the PowerJ:\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. 20