Electric Service Requirements (ESR)

Standards for materials and construction.

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

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Online ESR

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Copyright Notice (Proprietary Material)
Comment Form
Summary of Revisions – 2017
Additions and Revisions – Monthly


General Information – 100

Number Title
1.00 Title Blocks and Logos
1.01 Important Telephones and Numbers
1.01 New Construction Offices
1.01 Customer Service
1.01A UES-Nogales Contact Numbers
1.01A UES New Construction Offices
1.01A UES Nogales Customer Service
1.02-1.03 Definitions

Application for Service

Number Title
1.04-1.05 Type of Service & Limitations
1.06 Preliminary Notification
1.06 Obtaining Information
1.06 Removal of Facilities
1.06 Service Scheduling
1.07 Government Contacts
1.13 Residential/Commercial New Construction Application
1.13A Service Removal Request
1.14 Answers to Commonly Asked Questions
1.15 Outline for Project Completion - Residential
1.16 Outline for Project Completion - Commercial

Customer Information

Number Title
1.17 Codes and Regulations
1.17 Customer Installations
1.17 Access to Premises
1.17 Employee Identification
1.18 Employee Compensation
1.18 Tampering
1.18 Protection of TEP Property
1.18 Design of Customer's Equipment
1.19 Interruptions
1.19 Defaults
1.19 One Call/Access

Customer Installation

Number Title
1.20-1.21 Customer Installation of Standby and Alternate Generation Sources
1.22 ESRs for Small Interconnected Distributed Generation Sources
1.23 ESR for Medium-Sized Commercial Interconnected Distributed Generation Sources
1.24 Unmetered Energy
1.24 Resale of Energy
1.24 Attachments to TEP Facilitites
1.24 Access to Pad Mounted Equipment
1.24 Trimming Trees

Misc. Requirements

Number Title
1.25 Right-of-Way
1.25 Prior to Excavation
1.25 High-Voltage Power Lines and Safety Restrictions
1.25 Damage to TEP Facilities
1.25 Grade Changes
1.25 Relocation of Electric Facilities
1.25 Power Outage Request
1.26 Requirements for Legal Description, Exhibit Drawing and Electronic File for Easement

Line Extensions/Civil – 200

Line Extensions – General
Number Title
2.01 Overhead and Underground Line Extensions
2.02 High Density Development Designs
2.02 Additional Charges
2.03 New Subdivisions — Provisions for Service
2.03 Ducts for Road Crossing
Single-Phase Underground Line Extensions
Number Title
2.04 Requirements
Three-Phase Underground Line Extensions
Number Title
2.04 Requirements
205 Duct and Concrete Installation
207 Trench, Backfill
208 Site Preparation for Equipment Pads on Sloping Grades
209 Trenching, Underground Residential Distribution (URD)
210 Sleeve Installation
212 Trench and Duct Encasement, Drainageway Crossings
215 Trenching 2.5-inch, 4-inch, and 6-inch Duct Installation
218 Duct Stub Detail
220 Underground Riser, Customer Installed
221 Riser Details — TELCO/CATV/CAP
225 Distribution Pullbox with Manhole
226 Pullbox 15 kV with Lid (Reference Only)
230 Equipment Barrier, Protective
232 Excavation and Duct Placement for 3Ø Fused Junction Cabinet (F2)
233 Transformer Pad Underground 3Ø
234 Excavation and Duct Placement for 3Ø Junction Cabinet (J2)
235 Excavation and Duct Plasement for 1Ø Junction Cabinet (J1)
240 Box Pad Installation
241 Capacitor Installation
242 Gas Insulated Switch Installation

Services – 300

Number Title
3.01 Load Balancing
3.01 Typical Service Entrances
3.01 Socket Wiring

Electric Service Lines

Number Title
3.01 Overhead Service Lines
3.01 Underground Service Lines
3.01 Service Trenches
304 Overhead or Underground Service and Meter Location
305 Service Entrance with Conduit Riser Overhead
307 Service Entrance on a Pole
308 Single-Phase 401A-600A, Three-phase Underground Service from Overhead, 600A
308A Single-phase Underground Service from Overhead, 0-400A
309 Three-phase Underground Service from Pad-mounted Transformer
310 Service Entrance Underground
312 Trenching, Service Single-phase
314 Service Entrance Temporary, Underground

Metering Installations – 400

Number Title
405 General Requirements
Requirements for Residential Socket Interiors
Meter Enclosures and Clear Working Space
408 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
409 Non-residential Service Pedestal (including Traffic Signals) 0-200A/0-600V
410 Commercial Service, 3W or 4W, 1Ø and 3Ø, 0-200A
412 Residential or Commercial Service, 3W, 1Ø, 201-400A
414 Socket Requirements - 1Ø w/Instrument Transformers
414 Socket Requirements - 3Ø w/Instrument Transformers
418 Residential and Commercial Multi-Metering Installations
420 Meter Protective Cabinets
422 Current Transformer Installations in Cabinets
423 Meter Socket and Conduit Installation Detail for Primary Metered Service
424 Remote Meter Cabinet for primary metered service, 201 - 800A
425 Terminating Box or Section
426 Combination Terminating Box and Main Disconnect
430 Current Transformer Installations in Switchgear
431 Metering Remote
432 Low Profile Switchboards
433 CT Compartment, 401-800A, 1Ø
434 CT Compartment, 201-1000A, 3Ø
435 CT Compartment, 1001-3000A, 3Ø
436 CT Compartment, 3001A-4000A, 3Ø
437 Enclosed Meter Panel in Raintight Switchgear
438 Switchboard Meter Panels
439 Removable Bus Links and CT Supports
451 Primary Metering Overhead and Underground
452 Approved Metering and Service Equipment
453 Grounding and Bonding

Short Circuit Protection – 500

Number Title
510 Short Circuit Protection

GIS Land Drawings – 600

Number Title
601 Overhead
601 Single Phase Underground
601 Three Phase Underground

Distributed Generation Interconnection Requirements (DGIRs)

View and download the DGIRs.