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Construction & Engineering Standards

PRECorp is an RUS borrower and constructs its facilities in accordance with RUS requirements. PRECorp has modified some of its internal construction standards to accommodate avian safety, to more clearly designate units and assemblies, or to utilize unique or specific design constraints. The construction assembly drawings and standards listed here supplement RUS Bulletins and are intended for line design and construction professionals who are familiar with RUS construction standards and assemblies. Please consult RUS Bulletins 1728F-803, 1728F-806, or similar for more background information; or contact PRECorp Engineering at extension x3524 for detailed information. 

1728F-803 - Specifications and Drawings for 24.9/14.4kV Line Construction, December 1998

1728F-806 - Specifications and Drawings for Underground Electric Distribution, June 2000

1728F-806 - Specifications and Drawings for Underground Electric Distribution, October 2018

  • Process Standards
  • Overhead Standards
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  • Urgent Standards
Standard Revision Date Description
PRE-CNS-001 8/24/2011 Tying Guide for Underground Risers
PRE-CNS-002 9/9/2014 Pole Setting and Soil Probe Guidelines
PRE-STD-001 11/29/2023 Distribution Staking Guidelines
Single Phase Assemblies
Tangent Structures    
Standard Revision Date Description
VA1.1R 6/21/2011 Single Phase Tangent Single Support
VA1.1RG 6/16/2011 Guarded Single Phase Tangent Sing Support
VA2.0R 3/5/2008 Single Phase Tangent Double Support
VA2.0RG 10/31/2008 Guarded Single Phase Tangent Double Support
     
Angle Structures    
Standard Revision Date Description
VA2.1R 2/5/2013 Single Phase Double Primary Support
VA2.1RG 2/5/2013 Perch Deterred Single Phase Primary Support
VA3.1R 3/21/2008 Single Phase Suspension Angle
VA3.1RG 11/24/2008 Guarded Single Phase Suspension Angle
     
Dead Ends    
Standard Revision Date Description
VA4.1R 9/14/2009 Single Phase Deadend Angle
VA4.1RG 4/6/2009 Guarded Single Phase Deadend Angle
VA5.1R 9/14/2009 Single Phase Deadend
VA5.1RG 9/15/2020 Guarded Single Phase Deadend
VA5.2R 2/5/2013 Single Phase Deadend Tap
VA6.2R 7/17/2017 Single Phase Double Deadend
VA6.2RG 7/17/2017 Guarded Single Phase Double Deadend
VA6.22R 6/26/2015 Single phase double Deadend with Neutral on Crossarm
VA6.22RG 9/15/2020 Guarded Single Phase Double Deadend with Neutral on Crossarm
Three Phase Assemblies
Tangent Structures    
Standard Revision Date Description
VC1.11R 6/21/2011 Three Phase Tangent Single Support
VC1.11RG 11/10/2008 Guarded Three Phase Tangent Single Support
VC1.41R 4/8/2011 Three Phase Single Support w/ Neutral on Cross Arm
VC1.41RG 2/19/2011 Guarded Three Phase Single Support w/ Neutral on Cross Arm
VC2.20R 6/21/2011 Three Phase Tangent Double Support
VC2.20RG 4/28/2011 Guarded Three Phase Tangent Double Support
     
Angle Structures    
Standard Revision Date Description
VC2.21R 6/21/2011 Three Phase Double Support
VC2.21RG 1/20/2012 Guarded Three Phase Double Support
VC2.51R 5/5/2011 Three Phase Double Support w/ Neutral on Cross Arm
VC2.51RG 4/19/2011 Guarded Three Phase Double Support w/ Neutral on Cross Arm
VC2.52R 4/28/2011 Three Phase Double Support
VC2.52RG 4/28/2011 Guarded Three Phase Double Support
VC3.1R 3/16/2012 Three Phase Suspension Angle
VC3.1RG 9/15/2020 Guarded Three Phase Suspension Angle
     
Dead Ends    
Standard Revision Date Description
VC4.1R 3/16/2012 Three Phase Deadend Angle
VC4.1RG 9/15/2020 Guarded Three Phase Deadend Angle
VC5.1 3/26/2008 Three Phase Vertical Deadend
VC5.1G 11/5/2008 Guarded Three Phase Vertical Deadend
VC5.31DR 10/27/2009 Three Phase Deadend on Crossarm Assembly, Small Conductor
VC5.31DRG 9/15/2020 Three Phase Deadend on Crossarm Assembly w/ Perch Guards, Small Conductor
VC6.1H 3/8/2011 24.9/14.4kV Double Deadend on H-Structure Assembly
VC6.51R 1/22/2013 24.9/14.4kV Three-Phase Double Deadend w/ Neutral on Crossarm
VC6.51RG 9/15/2020 Guarded Three-Phase Double Deadend  w/ Neutral on Crossarm
VC6.52R 1/22/2013 24.9/14.4kV Three-Phase Double Deadend w/ Neutral on Crossarm
VC6.52RG 9/15/2020 Guarded Three-Phase Double Deadend  w/ Neutral on Crossarm
VC6.1HG 3/7/2011 Guarded Double Deadend on H-Structure Assembly
VC6.21R 5/16/2011 3-Phase Double Deadend on Crossarm Assembly
VC6.21RG 5/19/2011 Guarded 3-Phase Double Deadend on Crossarm Assembly
Three Phase Large Conductor Assemblies
Tangent Structures    
Standard Revision Date Description
VC1.11LR 11/7/2017 Three Phase Tangent Single Support for Large Conductor
VC1.11LRG 11/7/2017 Guarded Three Phase Tangent Single Support for Large Conductor
VC2.20LR 11/7/2017 Three Phase Large Conductor Tangent Double Support
VC2.20LRG 11/7/2017 Guarded Three Phase Large Conductor Tangent Double Support
     
Angle Structures    
Standard Revision Date Description
VC2.21LR 11/7/2017 Three Phase Large Conductor Double Support
VC2.21LRG 11/7/2017 Guarded Three Phase Large Conductor Double Support
VC2.51LR 11/7/2017 Three Phase Large Conductor Double Support w/ Neutral on Cross Arm
VC2.51LRG 11/7/2017 Large Construction 3-Phase Double Support, Neutral on Crossarm
VC2.52LR 11/7/2017 Three Phase Large Conductor Double Primary Support
VC2.52LRG 11/7/2017 Guarded Three Phase Large Conductor Double Support w/Neutral on Cross Arm
VC3.2LR 3/16/2012 Large Conductor Three Phase Suspension Angle
VC3.2LRG 9/15/2020 Guarded Large Conductor Three Phase Suspension Angle
     
Dead Ends    
Standard Revision Date Description
VC4.2LR 10/24/2023 Large Conductor Three Phase Deadend Angle
VC4.2LRG 10/24/2023 Guarded Large Conductor Three Phase Deadend Angle    
VC5.71LR 10/27/2009 Three Phase Deadend on Crossarm Assembly, Large Conductor
VC5.71LRG 11/5/2009 Three Phase Deadend on Crossarm Assembly w/ Perch Guards, Large Conductor
VC6.21LR 3/28/2011 Large Construction 3-Phase Double Deadend on Crossarm Assembly
VC6.21LRG 3/30/2011 Guarded Large Construction 3-Phase Double Deadend on Crossarm Assembly
Double Circuit Assemblies
Tangent Structures    
Standard Revision Date Description
VD1.81LR 11/7/2017 24.9/14.4kV Double Circuit Tangent Large Conductor
VD1.81LRG 9/15/2020 Guarded Double Circuit Tangent Large Conductor
VD1_82LRG 4/3/2012 Guarded 24.9/14.4kV Double Circuit Tangent Large Conductor w Offset Neutral
VD2.90LR 11/7/2017 24.9/14.4kV Double Circuit Double Support Tangent
VD2.90LRG 9/15/2020 Guarded Double Circuit Double Support Tangent
     
Angle Structures    
Standard Revision Date Description
VD2.91LR 11/7/2017 24.9/14.4kV Double Circuit Double Support Tangent
VD2.91LRG 9/15/2020 Guarded Double Circuit Double Support Tangent
     
Takeoffs
Standard Revision Date Description
VC5.31HT 3/26/2008 Three Phase Takeoff form Deadend Crossarm Assembly, Small Conductor
VC5.31RT 3/4/2011 Three Phase Takeoff, Small Conductor
VC5.31RTG 3/4/2011 Three Phase Takeoff w/ Perch Guards, Small Conductor
VC5.71HT 3/26/2008 Three Phase Takeoff form Deadend Crossarm Assembly, Large Conductor
VC5.71LRT 3/7/2011 Three Phase Takeoff , Large Conductor
VC5.71LRTG 3/4/2011 Three Phase Takeoff w/ Perch Guards, Large Conductor
VC5.11GR 6/13/2008 Single Phase Tap of Three Phase Structure Guide
VA5.5G 2/5/2013 Single Phase Tap from Single Phase Structure Guide
VC5.1VT 4/10/2008 Three Phase Vertical Tap
VC5.2VT 4/11/2008 Large Conductor Three Phase Vertical Tap
Neutral Assemblies
Standard Revision Date Description
N6 3/19/2008 Deadend Offset Neutral Assembly
Miscellaneous Protection, Grounding, & Guying
Standard Revision Date Description
VC1.014  3/22/2011 Horizontal Standoff Insulator
H1.1 3/7/2012 Pole Protection – Ground Rod Type
H1.1A 3/7/2012 Pole Protection – Adding Ground Rod Type to Existing Ground
H3.1 3/22/2012 Grounding Assembly – Ground Rod Type for Sectionalizing  Airbrake Switch
P2.1 3/22/2012 Pole Protection Assembly – Butt Plate Type
E2.2L 10/10/2023 Single Down Guy Pole Eye Plate Type
E4.0L 3/19/2008 Single Down Guy Thimble Eye    
Standard Revision Date Description
UA1R 6/2/2014 Single Phase Cable Terminal Pole
UC1R 6/2/2014 Three Phase Cable Terminal Pole
UM1-6C
7/16/2012
Three Phase Transformer Concrete Pad
Primary
Standard Revision Date Description
VQ4.2R 9/11/2018 24.9/14.4kV Primary Metering
VQ4.2M 9/11/2018 24.9/14.4kV Primary Metering Retrofit
UQ3.3P2-25kV 1/4/2021 25kV Three Phase Primary Pad-Mount Metering
UM8.7B-02 10/28/2008 2400/4160V 200A Primary Underground Meter
UM8.7B-02-06 10/28/2008 2400/4160V Primary Underground Meter Guide
UM8.7B-06 10/28/2008 2400/4160V 600A Primary Underground Meter
Overhead
120/240V    
Standard Revision Date Description
K4.2G-01SC 6/11/2008 120/240V 100 & 200 Amp Mast Type Service
Q1.1-01SC 5/31/2013 120/240V 100A Self-Contained 3-Wire Down Loop
Q1.1-02SC 5/31/2013 120/240V 200A Self-Contained 3-Wire Down Loop
Q1.1-03SC 5/31/2013 120/240V 400A (320A) Self-Contained 3-Wire Down Loop
Q1.1-04IR 5/31/2013 120/240V 400A Instrument Rated 3-Wire Down Loop
Q2.1-02SC 5/12/2008 120/240V 200A Self-Contained 4-Wire Down Loop (Open Delta)
Q2.1-04IR 5/12/2008 120/240V 400A Instrument Rated 4-Wire Down Loop (Open Delta)
Q3.1-02SC 5/19/2008 120/240V 200A Self Contained 4-Wire Down Loop (Delta)
     
120/208V    
Standard Revision Date Description
Q3.3-02SC 5/21/2008 120/208V 200A Self Contained 4-Wire Down Loop
Q3.3-04IR-06IR 6/26/2008 120/208V 400/600A Instrument Rated 4-Wire Down Loop
     
240/480V    
Standard Revision Date Description
Q1.2-02SC 5/31/2013 240/480V 200A Self-Contained 3-Wire Down Loop
Q2.2-02SC 5/17/2008 240/480V 200A Self Contained 4-Wire Down Loop (Open Delta)
Q3.2-02SC 5/27/2008 240/480V 200A Self Contained 4-Wire Down Loop (Delta)
     
277/480V    
Standard Revision Date Description
Q3.4-04IR-06IR 6/26/2008 277/480V 400/600A Instrument Rated 4-Wire Down Loop
Q3.4-02SC 6/3/2008 277/480V 200A Self Contained 4-Wire Down Loop
Underground
Standard Revision Date Description
UM8-IR600-IR400-SC 5/15/2008 Metering Cabinets
     
120/240V    
Standard Revision Date Description
UM8-02SC 7/15/2022 120/240V 100A Self Contained 3-Wire Underground to Meter on Building
UM8-03SC 6/12/2008 120/240V 400A (Class 320) Self Contained 3-Wire Underground to Meter on Building
UM8-04IR 6/17/2008 120/240V 400A Instrument Rated 3-Wire Underground to Meter on Building
UM8.3-02SC 6/24/2008 120/240V 200A Self Contained 3-Wire Pedestal
UM8.4-02SC 6/28/2022 120/240V 200A Self Contained 3-Wire Post Structure
UM8.4-03SC 10/19/2009 120/240V 400A (Class 320) Self Contained 3-Wire Pedestal    
UM8.4-09IR-OB 12/14/2023 120/240V 900A Underground Single Phase Meter on Post Structure w/ Over the Bushing CTs    
UM8-O2SC-4X 4/5/2010 120/240V 200A Self Contained 4-Wire Underground to Quadplex Meter on Building    
         
120/208V    
Standard Revision Date Description
UM8.7-02SC 5/27/2008 120/208V 200A Self Contained 4-Wire Post Structure    
UM8.7-06IR 5/27/2008 120/208V 600A Instrument Rated 4-Wire Post Structure    
UM8.7-20IR 5/13/2008 120/208V 2000/3000A Instrument Rated 4-Wire CT Enclosure    
UM8.7-09IR-OB 12/14/2023 120/208V 900A Underground Three-Phase Meter on Post Structure w/ Over the Bushing CTs    
UM8.7-12IR-OB 12/14/2023 120/208V 1200-2000A Underground Three-Phase Meter on Post Structure w/ Over the Bushing CTs        
UM8.7A-02SC 12/6/2017 120/208V 200A Self Contained 4-Wire Underground to Meter on Building    
UM8.7A-06IR 4/27/2008 120/208V 600A Instrument Rated 4-Wire Underground to Meter on Building    
     
240/480V    
Standard Revision Date Description
UM8.7-04IR 5/27/2008 240/480V 400A Instrument Rated 4-Wire Post Structure
     
277/480V    
Standard Revision Date Description
UM8.8-02SC 2/8/2012 277/480V 200A Self Contained 4-Wire Post Structure
UM8.8-04IR 6/5/2008 277/480V 400A Instrument Rated 4-Wire Post Structure
UM8.8-06IR 10/29/2008 277/480V 600A Instrument Rated 4-Wire Post Structure
UM8.8-09IR 6/26/2008 277/480V 900A to 18000A Instrument Rated 4-Wire CT Enclosure    
UM8.8-09IR-OB 12/14/2023 277/480V 900A Underground Three-Phase Meter on Post Structure w/ Over the Bushing CTs    
UM8.8-12IR-OB 12/14/2023 277/480V 1200-2000A Underground Three-Phase Meter on Post Structure w/ Over the Bushing CTs    
UM8.7A-04IR 12/6/2017 277/480V 400A Instrument Rated 4-Wire Underground to Meter on Building    
     
Secondary     
Standard Revision Date Description
UJ4.1 1/18/2022 Secondary Handhole Single-Phase Grade Enclosure
UM5-5.R 8/21/2012 Pole Mounted Secondary Junction Box    
UM5-5.1R 8/21/2012 Additional Conduit for Pole Mounted Secondary Junction Box
     
Service Transformer Assemblies
Standard Revision Date Description
VG1.01/VG1.02 4/28/2022 Overhead Pole Mount Conventional and CSP Transformers
UG1.02 3/25/2022 Single Phase Padmount Loop Feed Transformers
UG3.02 4/12/2022 Three Phase Padmount Loop Feed Transformers
Overhead Transformer Construction Standards
Standard Revision Date Description
VG1.2R 3/3/2017 Single Phase CSP Transformer on Tangent
VG1.3R 2/16/2017 Single Phase CSP Transformer on Dead-End
VG1.4R 2/27/2019 Single Phase Conventional Transformer
VG3.3R & VG3.4R 5/24/2021 Three Phase Transformer Bank – Grnd Y-Y
VG3.4P 5/8/2008 Three Phase Overhead Transformer Platform: 277Y/480V
VG3.4PG 5/8/2008 Three Phase Overhead Transformer Platform: 277Y/480V
VG3.5 6/11/2008 4160 Primary Delivery Transformer Platform
VG3.5G 3/17/2009 4160 Primary Delivery Transformer Platform
VG3.5R 4/18/2008 4160 Primary Delivery Transformer Platform
Arrester Assemblies
Standard Revision Date Description
VP1.3R 6/29/2011 24.9/14.4kV, Three Phase Lightning Arrester
VP1.3RG 6/29/2011 24.9/14.4kV, Three Phase Lightning Arrester
Standard Revision Date Description
VS1.01R 6/20/2018 Miscellaneous Cutouts
VS1.1R 6/20/2018 Cutout – Single Phase
VS1.1R-LB 6/20/2018 Load Break Cutout – Single Phase
VS1.3R 6/20/2018 Cutout – Three Phase
VS1.3R-LB 6/20/2018 Load Break Cutout – Three Phase
VS2.31R 3/15/2008 Disconnect Switch – Three Phase
VS2.31LR 3/15/2008 Disconnect Switches – Three Phase Large Conductor
VS2.32R 3/26/2008 Disconnect Switch – Three Phase Horizontal GOAB
VS2.32V 5/27/2008 Disconnect Switch – Three Phase Vertical GOAB
VR1.03- 1/25/2025 Cutout Mounted Vacuum Interrupter Recloser (TripSaverII)
VR1.2R 7/17/2017 Single Phase Oil Circuit Recloser
VR1.3- 1/25/2025 Single Phase Cutout Mounted V.I. Recloser (TripSaverII)
VR3.2R 1/22/2013 Three Phase Oil Circuit Recloser w/ Bypass Switch
VR3.3R 3/22/2016 Three Phase Electronic Recloser w/ Bypass Switch
VR3.3- 1/25/2025 Three Phase Cutout Mounted V.I. Recloser (TripSaverII)
Standard Revision Date Description
VY1.0 9/22/2023 24.9/14.4kV and 12.5/7.2kV Voltage Regulators    
VY1.3 4/10/2008 24.9/14.4kV Three-Phase Voltage Regulator Platform
VY1.3G 4/10/2008 Guarded 24.9/14.4kV Three-Phase Voltage Regulator Platform
VY2.0 9/13/2023 Autotransformers & Line Step Transformers    
VY2.3 4/10/2008 Three-Phase Autotransformer Platform
VY3.3AR 9/17/2009 24.9/14.4kV Three-Phase 900kVAR Auto-Controlled Capacitor Bank
VY3.3R 8/10/2010 24.9/14.4kV Three Phase Capacitor Bank
Standard Revision Date Description
HRSM 12/20/2022 Heat Rate Sub-Metering Guides
Standard Revision Date Description
W1.1GR 3/28/2008 Pole Framing Guide
Standard Revision Date Description
DTR-1-7,-1-8,-2-7,-2-8 8/5/2015 Single and Double Distribution Pole Truss Support
Process
Standard Revision Date Description
PRE-CNS-000 4/29/2023 Retrofitting Existing Facilities for Avian Protection
AMI Retrofit Assemblies
Standard Revision Date Description
AP-AMI-1 6/3/2019 Perch Deterrents for AMI Relay Assembly
AP-AMI-2 6/3/2019 Perch Deterrent Assembly for AMI Relay with 277:120V Control Transformer
Overhead Retrofit Assemblies
Standard Revision Date Description
PRC-CNS-000 Fig. 1 04/29/20322 Miscellaneous Avian Protection Assemblies
VC1.11MA-1 10/1/2010 Single Support Crossarm Avian Safety Retrofit
VC1.41MA-1 10/1/2010 Single Support w/ Neutral on Crossarm Avian Safety Retrofit
VC2MA-1 2/12/2016 Double Support Crossarm Avian Safety Retrofit
VC2.5MA-1 2/12/2016 Double Support Crossarm Avian Safety Retrofit
VC5MA-1 9/21/2010 Single Deadend on Crossarm Avian Safety Retrofit
VC6MA-1 1/29/2016 Double Deadend Crossarm Avian Safety Retrofit
VC5TMA-1 9/21/2010 Three Phase Crossarm Tap Avian Safety Retrofit
VC1.11MAG-1 10/22/2010 Single Support Crossarm Avian Safety/Sage Grouse Retrofit
VC1.11MAG-2 4/24/2012 Single Support Crossarm Avian Safety/Sage Grouse Retrofit
VC2MAG-1 10/26/2010 Double Support Crossarm Avian Safety/Sage Grouse Retrofit
VC2.5MAG-1 10/26/2010 Double Support Crossarm Avian Safety/Sage Grouse Retrofit
VC5MAG-1 10/22/2010 Single Deadend on Crossarm Avian Safety/Sage Grouse Retrofit
VC5MAG-2 & 3 5/29/2013 Single Deadend on Two or Three Crossarms Avian Safety/Sage Grouse Retrofit
VC6MAG-1 10/22/2010 Double Deadend on Crossarm Avian Safety/Sage Grouse Retrofit
VC5TMAG-1 11/18/2010 Three Phase Fiberglass Crossarm Tap Avian Safety Retrofit
VC5TMAG-2
2/12/2016
Three Phase Fiberglass Crossarm Tap Avian Safety Retrofit
Transformer Retrofit Assemblies
Standard Revision Date Description
VG2MAG-1 5/31/2013 Two Phase Bank Avian Safety/Sage Grouse Retrofit
VG3MAG-1 3/2/2021 Total Three-Phase Bank Single Crossarm Avian Safety/Sage Grouse Retrofit
VG3MA(G)-2 3/2/2021 Cover Up Three-Phase Bank Single Crossarm Avian Safety/Sage Grouse Retrofit
VG3MAG-3 3/1/2021 Total Three-Phase Bank Double Crossarm Avian Safety/Sage Grouse Retrofit
VG3MAG-3A 3/1/2021 Total Three-Phase Bank Double Crossarm Avian Safety/Sage Grouse Retrofit
VG3MA(G)-4 3/1/2021 Three-Phase Bank Double Crossarm Avian Safety/Sage Grouse Retrofit
Other Retrofit Assemblies
Standard Revision Date Description
VP1.3MA-1 10/5/2010 Surge Arrestor Assembly Avian Safety Retrofit
VP1.3MAG-1 6/28/2011 Surge Arrestor Assembly Avian Safety/Sage Grouse Retrofit
VS1.3MA-1 10/5/2010 Three Cutout Retrofit Avian Safety Retrofit
Standard Revision Date Description
SL-1 10/21/2010 Street Light
U01.60LED.A8 01/24/2022 Underground LED Street Light
U01.RC 01/24/2022 120VAC Outlet for Underground
U02.60LED.A8 01/24/2022 Overhead LED Street Light
U02.RC 01/24/2022 120 VAC Outlet for Overhead
Standard Revision Date Description
AMI2.1 2/27/2019 Relay Assembly for AMI System
AMI2.2 7/15/2022 AMI Meter Relay
AMI2.3 6/3/2019 AMI Relay w/50VA 277:120V control transformer
AMI2.4 11/5/2019 AMI Relay Solar Option

 

Standard Revision Date Description
TS-3W 11/10/2020 3-Way GOAB Switch
RUS 1728F-803 Table 1
RUS 1728F-803 Table 2
RUS 1728F-803 Table 3
RUS 1728F-803 Table 4
RUS 1728F-803 Table 5
RUS 1728F-803 Table 6
RUS 1728F-803 Table 7
Standard Revision Date Description
UQ1.1P2-Alt 6/29/2022 Meter Fiberglass Pedestal 120/240V 200A - 25kVA
     
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      • Restoration Process
      • Social Media & Weather