2022 Electric Requirements
The intent of this manual is to clarify electric service requirements for Pacific Power and Rocky Mountain Power customers prior to and during construction. This manual may require different electrical
NEC Working Clearance Requirements: A Visual Guide
A visual guide to NEC 110.26 working space requirements. Understand the required depth, width, and height clearances for panels, switchgear, and transformers.
Secondary distribution substations
This section contains the relevant documents for designing 11kV to Low Voltage Distribution Substations
How to Plan and Install a Sub Panel
Planning to add a secondary electrical panel? Learn the essential capacity calculations and critical safety separation codes.
Design guidelines for substation and power distribution
No wall enclosure for transformer required and substation space
Communications Distribution System Requirements
Where a panel board for telecommunications is located in the same room or space as the SBB, that panel''s ground bus or the enclosure must be bonded to the SBB. If one is not present in the same
Unit Substations
Space and room requirements for unit substations shall be determined and accounted for during the Schematic Design Phase. Provide rear access to all unit substations. Working space for rear access
Clearances and Location Requirements for Enclosures, Pads, and
Clear and level work areas are required around underground equipment and enclosures to provide an adequate safe working space for operation or maintenance. Obstructions and elevation changes,
UFC 3-520-01 Interior Electrical Systems
Distribution and branch circuit panelboards should be of the wall-mounted, dead-front type, equipped with bolt-on circuit breakers. Load center style panelboards, with plug-in breakers should be used
NEC Requirements for Panelboards and Load Centers
In case of dump or wet locations, there be at least a 6 mm (1⁄4 inches) air space between the wall and a surface mounted enclosure to account the moisture and prevent the rusting and damaging of
Secondary unit substations design guide
As a result of locating power transformers and their close-coupled secondary switchboards as close as possible to the areas of load concentra tion, the secondary distribution
Guide for Electric Service and Meter Installations
Space and clearance requirements for indoor metering installations are the same as for outdoor metering. Except for mobile home overhead services described in Section 5, meters will be mounted
Design guidelines for substation and power distribution systems
No wall enclosure for transformer required and substation space requirement is reduced. For example, with VCB HT Panel, dry transformers, the substation layout can be one hall.
Micro-Modular & Edge DC
Prefabricated micro-modular data centers and edge pods, scalable from 5 to 50 racks, ready for 5G and edge AI workloads.
Immersion & Liquid Cooling
Single-phase immersion cooling tanks and direct-to-chip liquid cooling switches, achieving PUE below 1.1.
AI Servers & Racks
GPU-accelerated AI servers, high-density server racks, and network cabinets optimized for AI/ML workloads.
DCIM/EMS & Cable Bridge
Real-time data center infrastructure management, plus overhead cable trays and fiber bridges for structured cabling.