Electric Service Requirements (ESR)

The information contained on this page comprises the Electric Standards Requirements book distributed by Ƶ as a reference and a guide for regulations and practices regarding the connection and supply of electric service for Ƶ and UES Santa Cruz County.

For more information, see .

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Online ESR

Download the annual print-version . (published January 2024)
Please Note: The printed version does not include revisions past the yearly publication date.

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General Information – 100

Number Title
Title Block and Logos
Important Contact Information
One Call — Bluestake, Tree Trimming and Overhead Protection
Application for Service
Type of Service & Limitations
Preliminary Notification
Obtaining Information
Residential/Commercial New Construction
Application for Removal
Service, Power Kill and Access Scheduling
Scheduling Reminders
Access to Company Pad Mounted Equipment
Power Kill Request
Line Extensions
Qualifications for Three-Phase Service
Overhead Line Extensions
Underground Line Extensions
Subdivision Line Extensions (Single & Three Phase Requirements)
High Density Development Designs
Additional Charges
New Subdivisions - Provisions for Service
New Subdivisions - Ducts for Road Crossing
Rights-of-Way and Easements
Registered Land Surveyor Information
Legal Description
Exhibit Drawing
Electronic File for Easement
Outline for Project Completion, Residential & Commercial
Additional Information
Codes & Regulations
Customer Installations
Access to Premises
Employee Identification
Protection of Company Property
Customer's Equipment
Resale of Energy
Attachments to Company Facilities
Energy Diversion
Un-metered Energy

Civil Installations– 200

Number Title
Duct and Concrete Installation
Tracer Wire Installation, 46kV Underground
Trench, Backfill
Site Preparation for Equipment Pads on Sloping Grades
Trenching, Underground Residential Distribution (URD)
Sleeve Installation
Trench and Duct Encasement, Drainageway Crossings
Trenching 2.5-inch, 4-inch, and 6-inch Conduit Installation
Duct Stub Detail
Underground Riser, Customer Installed
Distribution Pullbox with Manhole
Pullbox 15 kV with Lid (Reference Only)
Equipment Barrier, Protective
Excavation and Duct Placement for 3-Phase Fused Junction Cabinet (F2)
Transformer Pad Underground 3-Phase
Excavation and Duct Placement for 3-Phase Junction Cabinet (J2)
Excavation and Duct Plasement for 1-Phase Junction Cabinet (J1)
Excavation and Duct Plasement for 3-Phase Junction Cabinet (J6)
Excavation and Duct Placement for Switchgear Box Pad (PME)
Excavation and Duct Placement for Pad-Mounted Capacitor
Excavation and Duct Placement for Gas Insulated Switchgear Box Pad (Vista)
Equipment at Grade in Open Air Alcove

Service Installations – 300

Number Title
Entrance Facilities: Load Balancing, Typical Service Entrances, Socket Wiring
Electric Service Lines: Overhead Service Lines, Underground Service Lines, Service Trenches
Overhead or Underground Service and Meter Location
Service Entrance with Conduit Riser Overhead
Service Entrance on a Pole
Three-Phase Underground Service from Overhead, 600A or Less
Single-Phase Underground Service from Overhead, 400A
Three-Phase Underground Service from Pad-Mounted Transformer
Service Entrance Underground
Trenching, Service Single-Phase 
Service Entrance Temporary, Underground

Metering Installations – 400

Number Title
General Requirements
Requirements for Residential Socket Interiors
Meter Enclosures and Clear Working Space
Residential or Commercial (Restricted) Service 0-100A, 3W, 1Ø, Overhead and 0-30A, 2W, 1Ø Overhead or Underground
Residential Overhead Service, 3W, 1Ø, 101-200A
Residential Underground Service, 3W, 1Ø, 0-200A
Residential Service, 3W, 1Ø, 0-200A Combination Meter Socket and Distribution Section
Meter Post - Underground Service to Mobile Home
Service Pedestal for Use in Common Public Area & Right-of-Way, 0-200A, 0-600V
Commercial Service, 3W or 4W, 1Ø and 3Ø, 0-200A
Residential or Commercial Service, 3W, 1Ø, 201-400A
Socket Requirements - 1Ø w/Instrument Transformers
Socket Requirements - 3Ø w/Instrument Transformers
Residential and Commercial Multi-Metering Installations
Residential, High-Rise Building, Individually Metered Units
Meter Protective Cabinets
Current Transformer Installations in Cabinets
Meter Socket and Conduit Installation Detail for Primary Metered Service
Remote Meter Cabinet for primary metered service, 201 - 800A
Terminating Box or Section
Combination Terminating Box and Main Disconnect
Commercial CT Power and Control Cabinet, 400-800A
Current Transformer Installations in Switchgear
Metering Remote
Low Profile Switchboards
CT Compartment, 401-800A, 1Ø
CT Compartment, 201-1000A, 3Ø
CT Compartment, 1001-3000A, 3Ø
CT Compartment, 3001A-4000A, 3Ø
Enclosed Meter Panel in Raintight Switchgear
Switchboard Meter Panels
Removable Bus Links and CT Supports
Primary Metering Overhead and Underground
Approved Metering and Service Equipment

Short Circuit Protection – 500

Number Title
Short Circuit Protection

Grounding and Bonding– 600

Number Title
General Information, Introduction, NFPA 70 NEC, Grounding, Bonding (Unfused Areas)
Minimum Size of Bonding/Equipment Grounding/Grounding Electrode Conductors and Grounding Bus
Concrete Encased Electrode (Ufer Ground)
Single Phase Meter Pedestal
Single Phase Overhead Residential Service (Meter Socket and Load Center)
Single Phase Overhead or Underground Service (All in One)
Single Phase Overhead or Underground (Multi-Pak Service)
Single or Three Phase Overhead Service(Meter Socket and Disconnects)
Three-Phase Service Overhead or Underground (Pull Section, Raceway and Sockets)
Transformer Rated Service With CT CAN Overhead or Underground
Transformer Rated Service Switchgear Overhead or Underground

Customer Technologies - 700

Number Title
Installation and Operation of Interconnected Distributed Generation Sources (Including Emergency and Standby Systems)
Electric Service Requirements For Small Interconnected Distributed Generation Sources
Electric Service Requirements For Medium-Sized Commercial Interconnected Distributed Generation Sources
Metering Requirements for Distributed Generation Facilities Larger Than 300kW
Backup Generator Connection Requirements
Interconnection Requirements – Distributed Energy Storage Systems, Single-Phase

Telecommunication, Wireless & Cable TV Pole Attachments - 800

For complete information, visit the Telecommunication Pole Attachments page.

Number Title
General Attachment Specifications
Pole Details
Anchor & Guying Details
Telecommunications and Fiber Identification
Pole Mounted Small Cell Equipment
Stranded Mounted Small Cell Equipment
Service Entrance on Customer Owned Small Wireless Facility (SWF) or Light Pole
Riser Details, Telco/CATV

Clearances - 900

Number Title
Design Principles for Overhead Distribution Lines Near Public Facilities
Service Entrance Clearance from Gas Meter Regulator or Extension Vent

GIS Drawing Legend

Number Title
Overhead/Underground Mapping Legend

Distributed Generation Interconnection Requirements (DGIRs)

View and download the DGIRs.

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