Download Standard for Electric Installation and Use

 Standard for Electric Installation and Use pdf

Standard for Electric Installation and Use – Xcel Energy is dedicated to providing safe, economical, and reliable service to its customers. It is the policy of the Company to serve all its customers in an orderly manner and assist in securing a more beneficial use of electricity. The “Xcel Energy Standard for Electric Installation and Use” contains the requirements and uniform standards necessary to achieve this policy.

Uniform enforcement of these standards throughout the Company will expedite service connections and treat each of our customers equally and fairly. Therefore, our employees are instructed and obligated to require adherence to these standards and procedures. The “Xcel Energy Standard for Electric Installation and Use” is a valuable timesaving publication that will help to determine the necessary requirements for customers’ wiring intended to be connected to the Company’s distribution system.

This publication will help you work more efficiently and aid in getting a utility connection established with minimum inconvenience. It also provides for the safety and reliability of our customers and safe working conditions for our personnel. The Company’s complete Rules and Regulations are contained in its tariffs as filed with the various state regulatory agencies. Service furnished by the Company is subject to the Company’s “Xcel Energy Standard for Electric Installation and Use”, the National Electrical Safety Code, and the Rules and Regulations of these Regulatory Commissions.

FOREWORD – Standard for Electric Installation and Use

This publication has been prepared to assist you in planning your electrical installation. The uniform standards contained in this publication are necessary to enable the Company to serve all its customers in an orderly manner and expedite service connections. New, rewired, altered, or repaired wiring installations intended for connection to the Company’s distribution system shall comply with the rules of the Company, the National Electrical Code® , and any other codes or regulations in effect in the area served. The Company does not assume the function of inspecting customers’ wiring for adequacy, safety, or compliance with the electrical codes. Such responsibility remains with the customer and inspectors. Questions concerning large and/or complicated electrical projects should be directed to the Company’s Builders Call Line in advance of construction and/or purchase of equipment @ 800.628.2121 or Meter Technical Support @ 800.422.0782. This will reduce the risk of project delays or expensive changes during construction. A Company Representative will discuss requests for exceptions to these standards with the customer. Only requests for exceptions based on extenuating circumstances will be evaluated. The exception request shall be submitted in writing in advance of construction and/or purchase or equipment. Exception requests are evaluated on a case-by-case basis and will be responded to in writing. Exceptions will not be granted verbally. The written response will indicate whether the request has been granted or denied. Exceptions shall be submitted to the following:

Table of Contents


INTRODUCTION…………………………………………………………………………………………………………5
FOREWORD………………………………………………………………………………………………………………6
EXCEPTION FORM…………………………………………………………………………………………………….7
REVISION FORM………………………………………………………………………………………………………..8

  1. DEFINITIONS……………………………………………………………………………………………………….9
  2. GENERAL INFORMATION…………………………………………………………………………………..15
    2.1 EFFECTIVE DATE ……………………………………………………………………………………………….15
    2.2 INTENT ………………………………………………………………………………………………………………15
    2.3 APPLICATION FOR SERVICE……………………………………………………………………………….16
    2.4 RATE SCHEDULES……………………………………………………………………………………………..19
    2.5 SERVICE AND LIMITATIONS ………………………………………………………………………………..19
    2.6 CLOSED LOOP / FLAT TAP / JUMPERED……………………………………………………………….19
    2.7 CONNECTION …………………………………………………………………………………………………….19
    2.8 CUSTOMER-OWNED METER EQUIPMENT RESTRICTIONS…………………………………… 19
    2.9 DIVERSION OF ELECTRICITY………………………………………………………………………………20
    2.10 EASEMENTS FOR COMPANY’S FACILITIES ………………………………………………………….20
    2.11 CUSTOMER’S RESPONSIBILITY…………………………………………………………………………..20
    2.12 CUSTOMER-OWNED FACILITIES …………………………………………………………………………21
    2.13 SAFETY……………………………………………………………………………………………………………..22
    2.14 XCEL ENERGY LIMITED TELEPHONE DIRECTORY………………………………………………..25 CHARACTER OF SERVICE AVAILABLE………………………………………………………………27
  3. 3.1 TYPES OF SERVICE ……………………………………………………………………………………………27
  4. 3.2 METER SOCKETS FOR TYPES OF SERVICE …………………………………………………………28
  5. 3.3 DISTRIBUTION (PRIMARY) SERVICE ……………………………………………………………………28
  6. 3.4 TRANSMISSION SERVICE……………………………………………………………………………………28
  7. SERVICE FACILITIES …………………………………………………………………………………………29
  8. 4.1 SERVICES………………………………………………………………………………………………………….29
  9. 4.2 OVERHEAD SERVICE………………………………………………………………………………………….30
  10. 4.3 UNDERGROUND SERVICE ………………………………………………………………………………….32
  11. 4.4 SERVICE LATERAL SIZES (FOR BALANCED LOAD):…………………………………………………….35
  12. 4.5 CONDUIT SIZING CHART: ……………………………………………………………………………………35
  13. 4.6 TRANSFORMER INSTALLATIONS – NETWORK VAULTS ………………………………………..36
  14. 4.7 TRANSFORMER INSTALLATIONS – PAD-MOUNTED………………………………………………37
  15. 4.8 POINT OF DELIVERY…………………………………………………………………………………………..37
  16. 4.9 CUSTOMER-OWNED SERVICE CONDUCTORS……………………………………………………..38
  17. 4.10 METERING …………………………………………………………………………………………………………39
  18. 4.11 METER SOCKETS……………………………………………………………………………………………….44
  19. 4.12 INSTRUMENT TRANSFORMER COMPARTMENTS…………………………………………………47
  20. 4.13 PRIMARY METER INSTALLATIONS ………………………………………………………………………50
  21. 4.14 METER LOCATION AND INSTALLATION………………………………………………………………..51
  22. 4.15 METER MOUNTING HEIGHTS………………………………………………………………………………53
  23. 4.16 METER CLEARANCES…………………………………………………………………………………………54
  24. 4.17 COLD SEQUENCE METERING ……………………………………………………………………………..55
  25. 4.18 HOT SEQUENCE METERING ……………………………………………………………………………….56
  1. TRANSFORMERS ………………………………………………………………………………………………59
    5.1 GROUNDING………………………………………………………………………………………………………59
    5.2 SPECIAL RULES …………………………………………………………………………………………………59
    5.3 FAULT CURRENT………………………………………………………………………………………………..60
    5.4 ARC FLASH ………………………………………………………………………………………………………..60
  2. UTILIZATION EQUIPMENT ………………………………………………………………………………….69
    6.1 THREE PHASE VOLTAGE UNBALANCE ………………………………………………………………..69
    6.2 HARMONICS ………………………………………………………………………………………………………69
    6.3 POWER FACTOR ADJUSTMENT…………………………………………………………………………..71
    6.4 MOTORS ……………………………………………………………………………………………………………71
    6.5 NON-LINEAR LOADS …………………………………………………………………………………………..73
    6.6 WATER PIPE THAWING……………………………………………………………………………………….74
    6.7 SPECIAL APPARATUS…………………………………………………………………………………………74
    6.8 LOAD BALANCE………………………………………………………………………………………………….74
  3. SPECIAL TYPES OF SERVICE…………………………………………………………………………….75
    7.1 NON-STANDARD CONSTRUCTION ………………………………………………………………………75
    7.2 DATA PULSES…………………………………………………………………………………………………….75
  4. DISTRIBUTED ENERGY RESOURCES…………………………………………………………………77
    8.1 INTERCONNECTION REQUIREMENTS …………………………………………………………………77
    8.2 LABELING/PLACARD REQUIRMENTS …………………………………………………………………..77
    8.3 METERING REQUIREMENTS……………………………………………………………………………….78
    8.4 TELEMETRY REQUIREMENTS …………………………………………………………………………….79
    Drawings
    Section SC: Self-Contained Metering Drawings………………………………………………………..1.1-1.35
    Section TR: Transformer Rated Metering Drawings……………………………………………………2.1-2.8
    Section PM: Primary Metering Drawings…………………………………………………………………..3.1-3.8
    Section TM: Temporary Metering Drawings………………………………………………………………4.1-4.6
    Section IR: Interruptible Rate Drawings…………………………………………………………………….5.1-5.6

Section EV: Electric Vehicles………………………………………………………………….5.7-5.12
Section CC: Connection Cabinet Drawings……………………………………………………………….6.0-6.6
Section CC: Transformer Pad Drawings……………………………………………………………….6.7-6.106
Section CR: Clearance Requirements Drawings……………………………………………………..7.1-7.13

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