Amendment 0004_ESB No. 750.pdf

Also, visit https://www.nationalgridus.com for this and other National Grid information

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Customer Service Center New York Massachusetts

Phone Number and

Hours of Operation

1-800-642-4272

Mon-Fri 7:00 am – 7:00 pm

After 7:00 pm & Wknds – Emergency only

1-800-322-3223

Mon-Fri 7:00 am – 7:00 pm

Saturday 7:00 am – 5:00 pm

Fax 1-315-460-9270 (for new service applications only)

1-508-357-4730

Mailing Address

National Grid

Customer Service Center

300 Erie Boulevard W.

Syracuse, NY 13202-4250

National Grid

Customer Service Center

PO Box 960

Northborough, MA 01532-0960

Non-English-Speaking Customers

Para Clients que habian Espanol 1-800-561-6672 1-800-322-3223

Hearing/Speech-Impaired Customers

Specialized Commercial & Industrial Business Group

1-800-664-6729

Mon-Fri 8:00 am – 5:00 pm Not Applicable

Emergency Numbers – does not replace 911 emergency medical services

Life-Threatening Electric Emergency 1-800-892-2345

1-800-465-1212

Life-Threatening Gas Emergency 1-800-233-5325

Power Outages 1-800-867-5222 1-800-465-1212

Contractor Services

For Order Initiation and Inspection Release

1-800-260-0054

1-315-350-3967 Fax https://ngrid.com/eportal customerelectricconnectionsuny@nationalgrid.com

Mon-Fri 7:30 am – 5:00 pm

By Phone 1-800-375-7405

Mon-Fri 8:00 am – 4:30 pm

View/Upgrade/Demo and Inspection Release Portal https://ngrid.com/eportal

By Fax 1-800-882-0322 Using Electric

Service Request Form 1-888-266-8094

Online by Internet https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

Customer Order Fulfillment 1-800-664-6729 or 1-800-260-0054 (for assistance with pending electric service requests)

For Electric Inspectors, to release a municipal wiring inspection

1-800-375-7405 NE Only; 1-800-664-6729 NY

Mon-Fri 8:00 am – 4:30pm

24-hour automated system. *For single service requests only.

New Residential or Commercial Developments customerelectricconnectionsuny@nationalgrid.com

(To e-mail AutoCAD or MicroStation drawings – NY Only) workrequest@nationalgrid.com

(MA)

Dig Safe Requests

1-800-962-7692 or 811

Dig Safely NY

1-888-DIGSAFE (1-888-344-7233) or 811

Dig Safe System Inc.

811 is the nationwide number; see http://www.call811.com/state-specific.aspx

Hazard Identification Hotline

When working near power lines or high voltage lines

1-800-642-4272 1-888-625-3723 https://www.nationalgridus.com/ https://ngrid.com/eportal mailto:customerelectricconnectionsuny@nationalgrid.com mailto:customerelectricconnectionsuny@nationalgrid.com https://ngrid.com/eportal https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications mailto:customerelectricconnectionsuny@nationalgrid.com mailto:workrequest@nationalgrid.com http://www.call811.com/state-specific.aspx

Specifications for Electrical Installations

Covering National Grid’s Service Areas in

Massachusetts (MA) and New York (NY)

Electrical Service Bulletin (ESB) 750

National Grid / Specifications for Electrical Installations / 2022

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

PREFACE

These 2022 specifications consolidate and replace the “Specification for Electrical Installation 2021, and are in effect for the following National Grid companies:

• Massachusetts Electric Company

• Nantucket Electric Company

• Niagara Mohawk Power Corporation

These specifications, which protect the mutual interests of the Customer and Company, may be revised or amended from time to time in keeping with developments and progress of the industry. For the latest official version of this document please visit the Company’s web site address at:

https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications.

Printed copies of these specifications are not document controlled and may be obtained from the

Company by contacting the applicable Company representative. Therefore, the online version will always prevail over any uncontrolled printed documents. The 2022 version incorporates the ESB 750 Series

Errata and Revisions issued in January 2021.

Where referenced in tariffs by the National Grid companies, this new edition is synonymous with the designations as “ESB 750 Book” or “Information and Requirements Book” and meets the same requirements.

https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

TABLE OF CONTENTS

PREFACE

TABLE OF CONTENTS

PROCESS AND INFORMATION

Obtaining Electric Services

Safety Information

PART A – GENERAL INFORMATION

1.0 INTRODUCTION

1.1 Purpose

1.2 Scope

1.3 Rate Schedule

1.4 Cooperation and Time Requirements

1.5 Codes, Standards, and References

1.5.1 References

1.5.2 Supplemental Company Specifications

1.6 Requests for Information

1.7 Customer’s Responsibility

1.7.1 All Customers

1.7.2 Customers Served at Voltages Above 600V

1.7.2.1 Design Acceptance

1.7.2.2 Operation and Maintenance

1.8 Company’s Responsibility

1.9 Inspection, Wiring Adequacy, and Enforcement

1.10 Disclaimer

1.10.1 Company Approval

1.10.2 Use of Electricity

1.10.3 Condition of Service

1.10.4 Company Warranty Statement

1.11 Enforcement of Company Requirements

1.11.1 Enforcement Criteria

1.11.2 Diversion of Electrical Energy

1.11.3 Unauthorized Attachment

2.0 DEFINITIONS

3.0 GENERAL SERVICE CONNECTION REQUIREMENTS

3.1 Application for Service

3.1.1 Application

3.1.2 Public Grants and Special Permits

3.1.3 Easements

3.2 Number of Services

3.2.1 With Respect to Building and Premise

3.2.2 Electricity Delivered Through More Than One Meter

3.2.3 Multiple Service Requests

3.3 Temporary Service

3.3.1 Company Facilities

3.3.2 Location

3.3.3 Equipment

3.3.4 Duration

3.3.5 Cost

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

3.4 Access

3.5 Identification of Employees

3.6 Character of Service

3.7 Voltages Available

3.7.1 Available Services

Table 3.7.1-1: Available Services Below 600V

3.7.2 New Customers (Applicants)

3.7.3 Existing Customers

3.7.3.1 Customer Expansion

3.7.3.2 Voltage Migration at Customer’s Request

3.7.3.3 Voltage Migration at Company’s Request

3.8 Service No Longer Standard

3.9 Load Balance

3.10 Increase in Service

3.11 Discontinuance of Service

PART B – ELECTRIC SERVICE REQUIREMENTS

4.0 SERVICE CONNECTIONS

4.1 General

4.1.1 Rights-of-Way, Easements

4.1.2 Number, Routing and Location of Service Laterals or Service Lines

4.1.3 Relocation of Services

4.1.4 Voltage Drop Considerations

4.1.5 Minimum Size Single-Phase Service Connections

4.1.6 Service Conductor Splicing

4.1.7 Routing of Metered and Unmetered Conductors Within a Building

4.1.8 Temporary Service

4.1.9 Service to Manufactured and Mobile Homes, Mobile Home Parks, and Recreational

Vehicle Parks

4.1.9.1 Service to Manufactured and Mobile Homes and Mobile Home Parks

4.1.9.2 Service to Recreational Parks

4.1.9.3 Service to Tiny Homes

4.2 Overhead Secondary Voltage Service Connection (Under 600V)

4.2.1 General

4.2.2 Service Attachment, Location

4.2.3 Customer-Owned Service Pole

4.2.4 Overhead Service Line Clearances

4.2.4.1 General Overhead Service Line Clearances

Table 4.2.4.1-1: Overhead Service Line Clearance Requirements

4.2.4.2 Clearances to Swimming Pools

4.2.4.3 Service to Low Building

4.2.4.4 Riser Mast Requirements

Table 4.2.4.4-1: Galvanized Riser Mast Bracing Requirements

4.2.5 Service Drop and Connection to Service Conductors

4.2.6 Residential Overhead Service Upgrade

4.3 Overhead Primary Voltage Service Connection (2.4kV to 46kV inclusive)

4.4 Overhead Transmission Voltage Service Connection

4.5 Underground Secondary Service Voltage Connection (Under 600V)

4.5.1 General

4.5.2 Facilities in Shared Trench

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

4.5.3 Conduit System

4.5.4 Underground Secondary Service Connection from the Company’s Overhead

Distribution Supply Line

4.5.4.1 Customer-Owned Underground Secondary Service Conductors

4.5.4.2 Company Riser Pole Attachments

4.5.5 Underground Secondary Service Connection from the Company’s Underground

Supply Lines

4.5.5.1 General

4.5.5.2 Radial Fed Underground Secondary Services

4.5.5.2.1 General

4.5.5.2.2 Termination at Two-Foot Line

4.5.5.2.3 Termination at Termination Box Inside Customer Building

4.5.5.3 Network Areas and Underground Lines

4.5.6 Underground Residential Distribution (URD) Areas

4.5.7 Underground Secondary Service Connection

4.5.7.1 Underground Secondary Service to Meter Pedestals and Meter Posts

4.5.7.2 From a Company-Owned Primary Underground Service Lateral

4.5.7.3 From an Outdoor Single-Phase Pad Mounted Transformer

4.5.7.4 From an Outdoor Three-Phase Pad Mounted Transformer

4.5.7.5 Service to Buildings Requiring Multiple Meter Rooms or Multiple Meter Locations

4.6 Underground Primary Voltage Service Connection (from 2.4kV to 46kV inclusive)

4.7 Underground Transmission Voltage Service Connection

4.8 Access Roads

5.0 SERVICE EQUIPMENT

5.1 General

5.1.1 Service Equipment Required

5.1.2 Service Equipment Minimum Continuous Current Rating

5.1.3 Service Equipment Minimum Short Circuit Withstand Capability

5.1.4 Routing of Metered and Unmetered Conductors

5.1.5 Taps Ahead of Main Service Equipment

5.1.6 When Service Equipment Ahead of Metering is Required

5.1.7 Service Equipment on Service Poles, Pedestals, or Posts

5.1.8 Service Equipment Arrangement

5.1.9 Service Equipment Minimum Attributes

5.1.9.1 Interrupting Rating

5.1.9.2 Inductive Heating

5.1.9.3 Metering Transformer Space

5.1.9.4 Bonding

5.1.9.5 Spare Fuses

5.1.9.6 Circuit Breaker

5.1.9.6.1 Control Circuit Protection

5.1.10 Instrumentation and Control Wiring

5.2 Residential

5.3 Network Service

5.3.1 General

5.4 Multiple Occupancy Building Service

5.5 Service Equipment Above 600V

6.0 GROUNDING

6.1 General

6.2 Equipment to Be Grounded

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

6.3 Grounding Methods

6.4 Grounding Restrictions

6.5 Ground Fault Protections

7.0 METERING

7.1 General

7.1.1 Meter Location and Access for New or Upgraded Services

7.1.2 Working Clearances

7.1.2.1 Indoor Installations

7.1.2.2 Outdoor Installations

7.1.2.3 Electric and Gas Meter Clearances

7.1.3 Physical Protection

7.1.4 Violations

7.1.5 Security of Unmetered Wiring

7.1.6 Taps Ahead of Metering

7.1.7 Group Metering

7.1.8 Shared Metering (for NY only)

7.2 Meter Application and Requirements 600V and Less

Table 7.2-1: Self-Contained and Transformer-Rated Meter Applications

Table 7.2-2: Self-Contained Meter Socket Enclosure Requirements

Table 7.2-3: Meter Socket Enclosure Minimum Short Circuit Withstand Capability

Table 7.2-4: Number of Terminals for Self-Contained Meter Enclosures by Service

Voltage

Table 7.2-5: General Self-Contained Meter Socket Enclosure Installation

Responsibilities Checklist

Table 7.2-6: 320 A Meter Socket Applications

7.3 Self-Contained Meter Socket Installations

7.4 Transformer-Rated Metering 600V and Less, 400 A and Above

7.4.1 Instrument Transformers and Enclosures

7.4.2 Meter Socket Enclosure

7.4.3 Sequence for Complex Metering

7.4.4 Instrument Transformer Secondaries

7.4.5 Pad-Mounted Transformer Service Metering

7.4.6 Metal-Enclosed Free-Standing Service Cubicles Rated 600V or Less (Secondary

Voltage Installations)

7.4.6.1 General

7.4.6.2 Metering Sequence

7.4.6.3 Unmetered Supply Conductors

7.4.6.4 Meter Location

7.4.6.5 Customer’s Auxiliary Equipment

7.4.6.6 Metering Transformer Equipment Compartment

7.5 Metering Above 600V

7.6 Metering Pulse Signals

7.7 Meter Boards and Supports

7.7.1 Meter Mounting

7.7.2 Meter Mounted on the Exterior of a Building

7.7.3 Meter Mounted on a Free-Standing Support

7.7.4 Meter Installed Interior to a Building

8.0 MOTORS AND ELECTRIC VEHICLE (EV) CHARGERS

8.1 General

8.2 Single-Phase Motors

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

8.2.1 Single-Phase Motor Limitations

Table 8.2.1-1: Recommended Limitations for Single-Phase Motors

8.2.2 Maximum Locked-Rotor Currents

8.2.3 Single-Phase Motors on Three-Phase Service

8.3 Three-Phase Motors

8.3.1 Size of Motors

8.3.2 Maximum Locked-Motor Currents

8.3.3 Maximum Permitted Starting Current

Table 8.3.3-1 – Three-Phase Motor Starting Current

8.4 Motor Protection

8.4.1 Overload Protection

8.4.2 Protection Against Single-Phase Operation

8.4.3 Reverse Phase Protection

8.4.4 Undervoltage Protection

8.5 Motor-Starting Requirements

8.5.1 Objectionable Voltage Variation

8.5.2 Current Inrush Limitation

8.5.3 Favorable Locations

8.5.4 Company Notification of 3 HP Single-Phase and 10 HP Three-Phase Applications

8.6 Electric Vehicle (EV) Chargers

9.0 TRANSFORMER INSTALLATIONS ON CUSTOMER PREMISES

9.1 General

9.2 Installations

9.2.1 Overhead Transformers

9.2.1.1 Recommended Application

9.2.1.2 Company Furnishes

9.2.1.3 Customer Furnishes

9.2.2 Outdoor Single-Phase Pad Mounted Transformer

9.2.3 Outdoor Three-Phase Pad Mounted Transformer

9.2.4 Transformer Vault in Non-Network Area

9.2.5 Mat and Fence Substation

9.3 Available Fault Current

9.3.1 Network Services

9.3.2 Single-Phase Transformers

Table 9.3.2-1: Single-Phase Transformers Available Fault Current

9.3.3 Three-Phase Overhead Transformers

Table 9.3.3-1: Three-Phase Overhead Transformers Available Fault Current

9.3.4 Three-Phase Pad Mounted Transformers

Table 9.3.4-1: Three-Phase Pad Mounted Transformers Available Fault Current

10.0 DISTURBANCES AND POWER QUALITY

10.1 General

10.2 Motors

10.3 Devices with Intermittent High Current

10.4 Automatic Reclosing

10.5 Harmonic and Other Distortion

10.6 Power Supply to Voltage Sensitive Equipment Computers and Sensitive Equipment ... 65

10.7 Isolation Transformer

Table 10.7-1: Minimum Number of Single-Phase Transformers to Service

Reduced-Voltage Load on a Three-Phase, 3-Wire Service

10.8 Electric Vehicles (EV) Chargers

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

11.0 CUSTOMER-OWNED ELECTRIC SOURCES – INCLUDING STANDBY

GENERATORS

11.1 General

11.2 Emergency and Standby Electric Sources

11.2.1 Compliance Criteria

11.2.2 Electric Source Type and Installation Method

11.2.2.1 Separately Derived Systems

11.2.2.2 Temporary Emergency Connections

11.2.3 Transfer Systems

11.2.3.1 Service Equipment Rated Transfer Switches

11.2.3.2 Open-Transition Transfer

11.2.3.3 Closed Transition and Auto Transfer

Table 11.2.3.3-1: Relay Settings to Parallel Standby or Emergency Generators with the Company System

11.2.4 Identification and Clearances

11.3 Parallel Electric Power Production

11.3.1 Inverters

12.0 UTILIZATION AND SPECIAL EQUIPMENT

12.1 Electric Fences

12.2 Signs and Automatically Controlled Lighting

12.3 Lightning and Surge Protection

12.4 Power Factor Correction, Capacitors

12.4.1 Capacitor Installation

12.4.2 Static VAR Compensators (SVC)

12.5 Radio and Television

12.5.1 Transmitting Station, Repeater, or High Frequency Equipment

12.5.2 Antennas

12.5.3 Eliminator or Trap

12.6 Carrier Current Systems

13.0 REVISION HISTORY

FIGURES

1.5-1 Utility Electric Supply and Premise Wiring Illustration

2-1 Typical Service Installation Diagram Below 600V – Excluding Network

4.1.8-1 Typical Overhead Service Pole for Permanent or Temporary Service Below 600V

4.1.8-2 Alternate Temporary Overhead Service Below 600V

4.1.8-3 Typical Post Installation for Permanent or Temporary Underground Service

4.1.9.1-1 Typical Service to Manufactured and Mobile Homes and Mobile Home Parks

4.2.1-1 Typical Overhead Service Arrangement Under 600V

4.2.2-1 Typical Residential Overhead Service Under 300V and 400 A

4.2.4.4-1 Overhead Service Attachment and Riser Mast Requirements

4.5.1-1 Typical Underground Service Arrangement Under 600 V

4.5.1-2 Underground Secondary Service Residential Meter Connection Conduit or Direct

Buried

4.5.4.2-1 Underground Secondary Service Riser Pole

4.5.6-1 Underground Residential Distribution Details

4.5.7.5-1 Typical Service to Multiple Occupancy Building

7.1.2-1 Electric Meter Working Clearances

7.1.2.3-1 Electric Meter to Gas Meter Clearances

7.3-1 Residential or Commercial Single-Phase Service (120/240V, 120/208V and 277/480V

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

3-Wire, 100 or 200 A; 4 and 5 Terminal Meter Socket; Meter Form – 12S and 2S)

7.3-2 Residential URD (Direct Buried) Single-Phase Service

7.3-3 Residential or Commercial Single-Phase Service (120/240V, 3-Wire, 320 A; 4 Terminal

Meter Socket Enclosure Form 2S)

7.3-4 Commercial Three-Phase Service (208Y/120V and 480Y/277V, 4-Wire, 100 A or

200 A; 7 Terminal Meter Socket; Meter Form – 16S)

7.3-5 Commercial Three-Phase Service (208Y/120V and 480Y/277V, 4-Wire, 320 A; 7

Terminal Meter Socket; Meter Form – 16S)

7.3-6 Residential or Commercial 2-to-6 Ganged Single-Phase Service (120/240V 3-Wire per

Position; 4 and 5 Terminal Meter Socket; Meter Form – 2S and 12S)

7.3-7 Service Pedestal Single-Phase Service (120/240V 200 A and 120/208V 100 A, 3-Wire; 4 and 5 Terminal Meter Socket; Meter Form – 2S and 12S)

7.3-8 Residential or Commercial Meter Center (More Than 6 Meters; 4 and 5 Terminal Meter

Socket; Meter Form – 2S and 12S and 16S)

7.3-9 Residential Ganged for up to 4 Mobile Homes Single-Phase Service (120/240V

3-Wire per Position; 4 and 5 Terminal Meter Socket; Meter Form 2S and 12S)

7.3-10 Typical Three-Phase and Single-Phase Cold Sequenced Metering Arrangement

7.4.1-1 Transformer Rated Metering Cabinet (Secondary Metering Installation; 120/240V, Single-Phase (Maximum 400 A); 208Y/120V and 480Y/277V Three-Phase (400 A through 800 A)

7.4.1-2 Typical Commercial Installation 2 to 6 Meters

7.4.1-3 Typical Outdoor Transformer Rated Meter Installation from Customer Service Pole ... 101

7.4.6.2-1 Instrument Transformer Metering Sequence (Service Cubicles – 600V Rating)

7.4.6.6-1 Metering Instrument Transformer Compartment in Service Cubicles Rated 600V

11.2.1-1 Standby Generator Transfer Switch Arrangements

PART C – APPENDICES

APPENDIX 1 – OVERHEAD ATTACHMENT METHODS

Table App1-1: Company Accepted Attachment Materials

Figure App1-1: Illustrated Details of Overhead Service Attachment Methods

APPENDIX 2 – TRAFFIC CONTROL METERED SERVICE REQUIREMENTS

Figure App2-1: Typical Traffic Control Metered Service Installation

APPENDIX 3 – SWIMMING POOL CLEARANCE CRITERIA

Figure App 3-1: Swimming Pool Perimeter

Table App 3-1: Clearances Over or Near Swimming Pools

Figure App 3-2: Swimming Pool Clearance References

APPENDIX 4 – ELECTRIC SERVICE AREAS

4.1 National Grid in Massachusetts

MA Service Areas

4.2 National Grid in Upstate New York

NY Western Division Service Areas

NY Central Division Service Areas

NY Eastern Division Service Areas

CHANGE PROPOSAL FOR NATIONAL GRID

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

PROCESS AND INFORMATION

Obtaining Electric Service

Please refer to the inside front cover of this book for Company contact information by phone, facsimile, mail, or internet.

How to Obtain Electric Service (less than 600V) – Applicants and Existing Customers

Step 1 – Pre-Plan

✓ Review the Service Territory Map in the following pages of this book to determine the availability of electric service where application is made.

✓ Determine the amperage size and voltage of service needed; see the applicable National Electrical Code.

✓ Determine the type of service desired as permitted.

✓ If heating with electricity, determine the total square footage of the area to be heated.

Determine the desired date electric service is to be energized (provide for applicable planning, material order, and construction schedules). A Company Customer representative will make contact to confirm if the desired date can be met by the Company.

Step 2 – Request

✓ Applicants for a new electric service:

▪ The individual or entity who will be responsible for the electric bill must apply for service by contacting the Company’s state-applicable Customer Service Center.

▪ Applicants may be required to submit written application and provide a security deposit according to the applicable Company tariff, which will be conveyed at the time the Applicant contacts the Company to request a new service in their name.

▪ The Applicant or their designated representative may initiate the service order by mail, facsimile, internet or telephone.

When applying by mail or facsimile, an electric service request form is available from the Company’s state-applicable Customer Service Center. Fill out the form providing the following information:

✓ Customer name, mailing address, phone number and daytime contact information

✓ The address where electric service is to be delivered and specific directions, including the nearest intersection

✓ The name, address and telephone number of the electrical contractor, if one will be used

✓ The specifics about type and size of service as defined above

✓ The proposed date for electric service (may require re-negotiation once Company work scope is defined)

When applying by internet, go to http://www.nationalgridus.com/ProNet/. Click “Learn More” under “New/Upgraded Service” section in the middle of the page, then proceed to the appropriate state to download the form applicable to the request type.

✓ To request an upgrade, relocation or rewire of an existing electric service, the Customer or their designated licensed electrical contractor may initiate the request by mail, facsimile, internet or telephone. Contact the Company’s state-applicable Customer Service Center. For residential single-phase services, information which will assist in potentially expediting the request includes: the service location, service pole, and meter location if the service remains at the same location and if there are no clearance violations caused by unsuitable locations such as those referenced in Section 4.2.4 and Section 7.1.1. Where there is a clearance issue or if the attachment is inaccessible by ladder from the ground, the Company designates the service location.

✓ To request a temporary service, the request should be made by the individual or entity responsible for payment of charges associated with the temporary service. Payment is required in advance of scheduling the installation of a temporary service according to the applicable Company tariff.

If an easement is required, the Applicant or Customer completes an Easement Application Form.

http://www.nationalgridus.com/ProNet/

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

How to Obtain Electric Service (less than 600V) – Applicants and Existing Customers – Continued

Step 3 – Plan

▪ Consult the Company regarding the type of service available and typical scheduling before plans are completed, the equipment is purchased, and construction is started.

▪ For residential developments, commercial, and industrial applications, an AutoCAD or Microstation (if available) electronic copy of the site plan, with grades and curb cuts may be e-mailed to the Company.

▪ For 400 A services and larger and distributed generation and standby generator proposed installations, a one-line diagram shall be submitted to the Company. Show service voltage; rating of main switch(es) and main overcurrent device(s); number, size, and type of conductors; number, size, and material of conduits; and location of all utility billing meters, and whether they are self-contained or transformer rated. The diagram must include information from the service attachment point to the main disconnect switch and overcurrent device (i.e. service equipment) and all utility billing meters.

▪ Secure appropriate property rights (easements, licenses, permits, etc.) prior to the installation of any electrical service.

▪ Contribute to the cost of the service installation and connection to the Company’s distribution system if the line on private property exceeds the allowance as provided in the Company’s applicable tariff.

Step 4 – Installation

✓ The Company’s work can be scheduled only after the Company has received all documents and payment toward construction, if required.

✓ Complete the electrical wiring.

✓ Obtain any required electrical permits and arrange electrical inspection.

✓ Provide a completed “Certificate of Electrical Inspection” to the Company.

✓ Follow the Company’s disconnect/reconnect policy for rewires/upgrades for less than 200 A single-phase overhead residential services only.

Note: Licensed electricians or qualified electrical contractors have several options to perform this work, providing they are using the same Point of Attachment. Contact the Company for a representative to review the details for the available policy in your area.

✓ Provide a completed “Certificate of Compliance to Minimum Insulation Standards” to the Company if an existing home is converted to electric heat.

✓ Provide appropriate property rights for the Company’s facilities, as required.

✓ Pay any charges that might be required by the Company according to its applicable tariff.

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

Safety Information

National Grid is committed to the pursuit of safety excellence through compliance with all OSHA. State, and Regulatory requirements. We encourage the Customer or its Contractor to comply with the same requirements and for safe trenching.

For worker safety precautions as applicable for the installation, please refer to:

• NESC ANSI C2;

• NFPA 70E;

• OSHA and

• any other state and local requirements.

811 is the nationwide number for utility locate requests before trenching:

http://www.call811.com

In New England States: http://www.digsafe.com

For Utility Locate Requests:

• Call 1-888-DIGSAFE (344-7233) or 811

• Submit Online

In Upstate New York:

http://www.digsafelynewyork.com

For Dig Safely NY Utility Locate Requests:

• Call 1-800-962-7962 or 811

• Submit Online

The Electrical Safety Foundation

International (ESFI):

http://www.esfi.org https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications http://www.call811.com/ http://www.digsafe.com/ http://www.digsafelynewyork.com/ http://www.esfi.org/

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

PART A – GENERAL INFORMATION

Note: The information provided in Part A contains common general conditions of electric service based upon state laws and regulations that govern the authority of utilities to provide electric service under applicable tariffs. While each utility's requirements may vary from state-to-state, most states have adopted some form of the National Electrical Safety Code (NESC). The NESC is an adoptable code promulgated by IEEE through the ANSI standards-making process.

1.0 INTRODUCTION

1.1 Purpose

The purpose of this document is to provide National Grid’s general electric service rules for basic requirements essential for maintaining satisfactory service or interconnection compatibility with National

Grid’s electric power system (EPS). In addition, these rules are intended to properly protect the safety and interests of National Grid’s Customers and others served by the EPS operated by the utility. Where the term “Company” is used, it refers to the applicable serving utility within National Grid’s service territories. These basic rules are supplemented by the applicable tariffs in effect in each of the Company’s service territories; as such tariffs may be amended from time to time.

1.2 Scope

These electric service requirements cover conductors and equipment connecting the Company’s EPS at the Customer’s service point. These also include other topics associated with the supply of electricity that are of mutual interest to the Company, Customers, design professionals, and qualified installers. It should be noted that this is not intended to be a complete set of rules governing the electrical premises wiring and equipment.

1.3 Rate Schedule

Electric tariffs and associated rules and regulations are on file with the applicable state regulatory agencies and are also available for download from the Company’s website for each state. The following are the associated National Grid tariffs for these specifications, as such tariffs may be amended from time to time:

• In Massachusetts, “Terms and Conditions for Distribution Service”

• In New York, P.S.C. No. 220, “Schedule for Electric Service”

1.4 Cooperation and Time Requirements

The Customer, its authorized agent and/or design professional is responsible for cooperating with the

Company and permitting a thorough and proper technical review by the Company for acceptance and timely delivery of the Company’s services. Preliminary information leading to new or increased electric service requirements shall be submitted to the Company early in the planning stages. This will ensure proper design and scheduling coordination of the work associated with the service connection.

1.5 Codes, Standards, and References

These rules supplement and may exceed standards of safety regarding the Customer’s electrical installation set forth in the National Electrical Code (NEC), the National Electrical Safety Code (NESC) and other applicable codes. These rules are not a substitute for the NEC, NESC, municipal codes, or any other authority having jurisdiction.

The Company requires that the Customer’s premises wiring installations be made in accordance with all applicable codes and these rules. Service shall be denied if these codes and the Company’s rules are not met. The Company accepts no liability for direct or indirect damages resulting from the Company’s

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications refusal to energize a service or the Company’s termination of a service that does not meet these rules and all other applicable codes.

Figure 1.5-1 is a general illustration of where the Company’s electric supply and the Customer’s premises wiring meet for what is covered and what is not covered by the NEC as described in NEC Section 90.2.

Local conditions of service may permit the Company’s metering to be installed at any point on either side of the service point; see 90.2(B)(5) in the NEC. Conditions of electric service are based on governmental laws or regulations that determine the Company’s authority to provide electric service under their tariffs.

These conditions of electric service affect the location of the service point and facilities under the

Company’s exclusive control.

1.5.1 References

NFPA 70 National Electrical Code

NFPA 70B

Recommended Practice for Electrical Equipment Maintenance

NFPA 70E Standard for Electrical Safety in the Workplace

ANSI/IEEE C2 National Electrical Safety Code

Building Code States of MA and NY

Massachusetts General Laws:

Chapter 82, Section 40A Chapter 164, Section 127 & 127A Chapter 166, Sections 21A-21G Chapter 266, Section 30 Chapter 266, Section 127

New York State Laws:

Public Service Law, Chapter 48 of the Consolidated Laws High Voltage Proximity Act, contained in Labor Law, Chapter 31 of the Consolidated Laws, Section 202-h 16 NYCRR, Rules and Regulations of the Department of Public Service

Federal Occupational Safety and Health Administration (OSHA)

29 CFR 1926.550(a)(15) 29 CFR 1926.651 (b)(1)(2) 29 CFR 1910.333 (c)

Excavation Notification Requirements - Dig Safe

In MA: 1-888-DIGSAFE (344-7233) In NY: 1-800-962-7962 811 is the nationwide number; see

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

1.5.2 Supplemental Company Specifications

*ESB’s designated with an asterisk are applicable only in New York

Specifications for Electrical Installations and Supplements Errata and Revisions

ESB No. 751* General Requirements Above 600V Service

ESB No. 752* Service above 15,000V

ESB No. 753* Primary Meter Pole

ESB No. 755* Operation & Maintenance Requirements for Service Above 600V

ESB No. 756 General Requirements for Parallel Generation Connected to a National Grid Owned EPS

- Appendix A Requirements for Parallel Generation Connected to National Grid Facilities in

NY

- Appendix B Requirements for DG Connected to National Grid’s Radial Distribution per the

NYS SIR

- Appendix C Requirements for Parallel Generation Connected to National Grid Facilities in Massachusetts

ESB No. 757 Network Services

ESB No. 758* Primary Service to Metal Enclosed Gear

ESB No. 759A Underground Residential Distribution (URD) Installation and Responsibility Guide

ESB No. 759B Underground Commercial Distribution (UCD) Installation and Responsibility Guide

See these Electric System Bulletins at http://www.nationalgridus.com/electricalspecifications.

1.6 Requests for Information

The Company invites inquiries and will assist the Customer with the application of these rules. Refer to the “Process and Information” section in the beginning of this book.

1.7 Customer’s Responsibility

1.7.1 All Customers

The Customer shall provide the service entrance, in accordance with the Company’s requirements, and all premises wiring on the load side of the service point. At all times, the Customer is responsible for ensuring that its electrical interconnection facilities attached to the Company’s EPS are designed, installed, operated, and maintained in accordance with all applicable codes, standards, rules, regulations, statutes, governmental ordinances, and third-party permits (collectively referred to as all applicable requirements). The Customer is responsible for contacting all third parties and obtaining all applicable permits (including environmental if required), approvals and inspections, and underground facility locating services for its premises wiring installation. Documentation substantiating the completion of such activities shall be furnished to the Company upon request.

The Customer shall assume or delegate, to an authorized representative, the primary responsibility for approval and acceptance of its equipment and the timing of its installation. The Company cannot accept any responsibility for the condition of the Customer's premises wiring and equipment. The Customer is responsible for the cost of on-going compliance with all applicable requirements noted above as well as any and all system design and operating changes to its installation.

http://www.nationalgridus.com/electricalspecifications

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

1.7.2 Customers Served at Voltages Above 600V

1.7.2.1 Design Acceptance

The planning and design of electric service equipment at voltages above 600V requires skilled application of engineering principles and data to ensure proper interconnection and functionality with the utility electric supply system. Therefore, a Professional Engineer, licensed in the state where service is made, shall prepare all documents submitted to the Company in connection with all electric service equipment above 600V. (Reference ESB 751 for details.)

1.7.2.2 Operation and Maintenance

Customers owning electric service equipment above 600V shall operate and maintain such equipment in accordance with Company supplied operating instructions and specifically ESB 755, “Operation and

Maintenance Requirements for Services above 600V.”

1.8 Company’s Responsibilities

The electric supply and service installation provisions and costs shall be in accordance with the

Company’s filed tariffs.

These specifications are subject to revision without notice. They may be revised or amended as the

Company shall determine, or as required by developments of the industry to protect the mutual interests of the Customer and Company. The latest revision shall be used. Additional copies of these specifications and any errata can be obtained from the Company; also see Section 1.5.2 for Company supplemental specifications.

1.9 Inspection, Wiring Adequacy, And Enforcement

The Company requires the Customer to furnish satisfactory evidence of the safe condition of its wiring before any service is connected. This will be in the form of an electrical inspection approval certificate from the authority having jurisdiction (AHJ) or an inspection agency approved by the AHJ and the

Company. Inspections shall confirm compliance with the National Electrical Code, any applicable municipal codes, and any specific utility service rules that are in addition to the aforementioned codes.

The Company and its accepted inspection organizations have the authority for enforcement of these rules. An inspection approval sticker shall be placed on the right side of the meter socket enclosure to assure compliance.

The Company requires certificates of inspection:

• On all new services and

• To re-energize any existing service that has been de-energized by any disconnect method (cutting service drop or lateral conductors at pole or weatherhead, or padmount transformer, meter removal, etc.) for any of the reasons or durations listed below:

1. An emergency as a result of accidental damage, fire, flood, weather, or earth related catastrophes.

2. Theft of service.

3. De-energization of service duration exceeding twelve months.

4. Following 36 months of service inactivity.

5. Anytime the Company severs electric service for the purpose of the premise wiring system being replaced, altered or extended beyond the service point up to and including the service equipment.

6. Unsafe condition by any AHJ mandate or by the Company.

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

1.10 Disclaimer

1.10.1 Company Approval

The Company’s approval of the Customer’s installation constitutes the Company’s acceptance of the

Customer’s proposed arrangement and equipment as meeting the Company’s minimum requirements under these rules and does not relieve the Customer from the obligation of complying with all applicable codes, statutes, rules or regulations.

1.10.2 Use of Electricity

Unless otherwise specified in the applicable regulatory tariff, the Company shall not be liable for damage to the person or property of the Customer or any other persons resulting from the use of electricity or the presence of the Company’s equipment on the Customer's premises.

Relative to any information supplied by the Company in connection with a Customer, it must be understood that the Company’s EPS is a dynamic system that changes from moment to moment as operating demands are made to the system. Furthermore, permanent changes to the system are common which will change the information provided to Customers or their Agents. Although the

Company makes every reasonable effort to obtain reliable information and proper calculations, the

Company provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of data furnished to Customers or their Agents. National Grid reserves the right to make improvements, upgrades or other changes to the electric system without notice. Such changes may invalidate any information provided.

1.10.3 Condition of Service

The Company shall not be liable for, or in any way in respect of, any interruption, abnormal voltage, discontinuance, or reversal of its service, due to causes beyond its immediate control whether accident, labor difficulties, condition of fuel supply, the decision of any public authority, or failure to receive any electricity for which in any manner it has contracted, or due to the operation in accordance with good utility practice of any emergency load reduction program by the Company or one with whom it has contracted for a supply of electricity, or inability for any other reason to maintain uninterrupted and continuous service; provided, however, that under the terms of the Company’s applicable tariff if the

Company is unable for any of the causes enumerated above to supply electricity for a continuous period of two (2) days or more, then upon request of the Customer, the Demand Charge, if any, shall be suspended for the duration of such inability.

1.10.4 Company Warranty Statement

For all voltages and services, the Company will cooperate with its Customers or their representatives.

However, neither by inspection, nor by the rendering of advisory service, nor in any other way, does the

Company give any warranty, expressed or implied, as to the adequacy, safety, or other characteristics of any equipment, wires, appliances, or devices owned, used, or maintained by Customers.

1.11 Enforcement of Company Requirements

1.11.1 Enforcement Criteria

The Company, the AHJ, and their accepted inspection organization have the authority for enforcement of the Company specifications. The Company’s Specifications for Electrical Installations Committee has the responsibility for: making interpretations of the rules, deciding upon the approval* of equipment and materials, and granting the special permissions contemplated in a number of the rules.

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications

Alternative construction methods not covered in these specifications must be submitted to the Company in writing and be approved* by the Company prior to purchase and/or installation of equipment. The

Company shall only grant deviations from these specifications in writing.

Exceptions from the NEC or other codes shall only be granted in writing by the local code authority exercising jurisdiction and filed with the Company.

*Note: See Section 2 for the definition of the term “Company approval”. The Company does not

"approve" all aspects of the Customer's equipment or premises wiring installation.

1.11.2 Diversion of Electrical Energy

A diversion of electrical energy is any method or device used by any person that prevents an electric meter from duly registering the quantity of electrical energy supplied by the Company and/or the taking of any electrical current without the Company’s consent.

Where there is evidence of meter tampering or theft of electrical energy, the responsible person or persons shall be liable for prosecution under penalty of law.

1.11.3 Unauthorized Attachment

The Company forbids any unauthorized attachments to its poles and towers, such as banners, signs, clothes lines, antennas, basketball hoops, lighting fixtures, etc. It forbids the use of any of its facilities for placards or other advertising materials. The Company will remove any such unauthorized attachments without notice and may prosecute such trespassing.

The Company forbids any work by contractors on or in any of its facilities without prior written authorization by the Company.

The attachment of antenna systems to Customer-owned electric service masts or poles carrying the

Company’s conductors is strictly prohibited due to the possibility of serious results from accidental contacts. Such attachments will be removed immediately upon discovery by the Company, and the removal will be at the Customer’s expense.

2.0 DEFINITIONS

Notes:

1. The following are terms defined as used in this publication.

2. For graphical relationship of defined components and section references in this book, see

Figure 2-1.

Applicant: Any entity (individual, firm, partnership, corporation, association, municipality, or governmental body) requesting a new service from the Company for their own use and not for resale or delivery to others.

Note: The Company must be consulted for specific Applicant rules as they apply in the Company’s applicable tariff.

Area Lighting (Utility): A utility lighting distribution system that provides lumens on public or private property. (See NEC 90.2(A) where area lighting is not under the exclusive control of utilities and see the

NESC for information that covers area lighting under the exclusive control of utilities.)

Authority Having Jurisdiction (AHJ): An organization, office, or individual responsible for enforcing requirements of a code or standard, or for approving equipment, materials, an installation, or a procedure.

(See also NEC Article 100.)

Back-up Service: A service type provided during an unscheduled outage of the Customer’s facility.

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Building: A structure which stands alone or which is cut off from adjoining structures by approved fire walls with all openings therein protected by approved fire doors.

Clearance: Required separation mandated by codes or the Company.

Closed Transition Transfer: A “make-before-break” transfer of electrical power sources which makes momentary contact with both synchronized power sources before it breaks contact with one of the two sources. It allows momentary paralleling of the generator and utility system under specific conditions.

One example is a closed transition automatic transfer switch (ATS).

Cold Sequence metering: Metering equipment located on the Customer’s side of the service equipment.

(See definition for service equipment.)

Company: The electric utility companies doing business as National Grid to which these requirements apply are:

• Massachusetts Electric Company

• Nantucket Electric Company

• Niagara Mohawk Power Corporation

Company Approval: Acceptance for the minimum requirements of National Grid exclusive of the

Customer’s obligation of complying with all applicable codes, statutes, rules or regulations. (See Section

1.10.1.)

Customer: An existing user of recurring electric service. (A contractor or developer performing work on behalf of a Customer is considered an agent of the Customer.)

Seasonal Customer: A Customer who applied for and receives the Company’s service periodically each year, intermittently during the year, or at other irregular intervals.

Design Professional: A Professional Engineer (PE) licensed to practice in the state where service is being installed and who is directly retained by the Customer for that purpose. (If the state licensed PE is representing a multi-member design firm, the firm shall have state certification to practice professional engineering and a copy of such license must be provided to the Company upon request. Any Company requested design professional certification proof must be submitted to the Company in writing upon initial design submission.)

Distribution Line: A distribution line is an electric line, either overhead or underground, including the necessary and ancillary accessories to distribute electric energy, which may provide service to more than one Customer. A distribution line may be located (1) in a street, highway, alley, or (2) on private right-of-way when used or useful to supply two or more Customers at separate premises.

Drip Loop: Individual conductors formed to prevent the entrance of moisture, and which provide adequate length to meet the Company’s and applicable code requirements.

Electrical Inspector: Inspectors external to the Company who are approved by the municipality in which they are working and recognized by the Company. Electrical Inspectors are responsible for ensuring that

For the latest authorized version, please refer to the Company’s website at https://www.nationalgridus.com/ProNet/Technical-Resources/Electric-Specifications the installation complies with all applicable codes and Company requirements, service equipment, material, installations, and/or procedures.

Electric Service: Maintenance by the Company of the appropriate voltage and frequency at the point of delivery shall constitute the delivery of electric service to the Customer. (See definition for Service.)

Emergency: An unplanned natural or accidental event that affects existing electric service.

Emergency Power System: A system legally required and classed as emergency by codes or any governmental agency having jurisdiction that automatically provides an independent reserve source of electricity, upon failure or outage of the normal power source, to elements of a power system essential to the safety of human life.

Exclusive Control: Generally, covers installation, ownership, restricted access, operation, and maintenance by qualified and authorized persons.

Good Utility Practice: is as defined by the NY and MA tariffs.

Hot Sequence Metering: Metering equipment located on the Company’s side of the service equipment.

(See definition for Service Equipment.)

Life Safety System: Those Life Safety Systems legally required by local, municipal, state, federal, or other codes or jurisdictions which may include, but not be limited to fire pumps, that are tapped ahead of the main service equipment and require utility metering.

Line: A system of poles, conduit, wires, cables, transformers, fixtures and accessory equipment used for the distribution of electricity to the public. A line may be located: (1) in a street, highway, alley; or (2) on a private right-of-way when used or useful to supply two or more Customers at separate…