Specifications for Electrical Installations 2010

1 Specifications for Electrical InstallationsCovering National Grid s Service Areas inMA, NH, NY, and RI2010 Our assistance is just a phone call is as close as your phone. Call our local National Grid office for useful information and assistance whenever you have questions on information in this you re planning Electrical and mechanical systems for your next project, our representatives will work closelywith you and your ll provide detailed analysis or supplemental data on all types of Electrical ll give you valuable aid before final plans are made on heating, cooling, wiring and lighting. And most important, we will suggest ways to conserve call to National Grid will help you help yourself.

2 Call 24 hours a day, every dayAlso, check the following Web site for this and other National Grid information: Service CenterFaxMail AddressNon-English Speaking CustomersPara clients que hablan EspanolHearing/Speech-Impaired CustomersMassachusettsNew HampshireRhode IslandSpecialized Commercial & IndustrialBusiness GroupEmergency Numbers- does notreplace 911 emergency medical servicesLife-Threatening Electric EmergencyLife-Threatening Gas EmergencyPower OutagesNew Construction & Service UpgradesTo initiate a request for new or upgradedelectric serviceBy PhoneContractor ServiceBy FaxOnline by InternetFor assistance with pending electricservice requests, contact CustomerOrder FullfillmentFor electric inspectors.

3 To release amunicipal wiring inspectionDig Safe RequestsHazard Identification HotlineWhen working near power lines or high voltage lines1-800-642-427224 hours/7 days1-800-322-3223 Mon-Fri 7 - 7 7 - 5 (for newservice applications only)1-508-357-4730 National GridCustomer Service Center300 Erie Boulevard , NY 13202-4250 National GridCustomer Service CenterPO Box 960 Northborough, MA 01532-09601-800-561-66721-800-322-322371 11-800-664-6729 Mon-Fri 8 Applicable1-800-892-23451-800-465-12121- 800-233-53251-800-640-15951-800-465-1212 1-800-642-427224 hours/7 days1-800-664-6729 Mon-Fri 8 Safely NY1-888-DIGSAFE (1-888-344-7233)Dig Safe System systemonly for single meter service requests1-800-642-42721-888-625-37231-80 0-375-7405 Mon-Fri 8 (24 hr.)

4 Automated system forthcoming in mid-2010 only for single meter service requests)New York1-800-375-7405 Mon-Fri 8 Applicable1-888-266-80941-800-867-5222 Automated OnCallSM811 is the nation wide number; see Residential or CommercialDevelopments - To e-mail AutoCAD or MicroStation select the appropriate to the section For Technical and Construction Professionals1-800-882-0322 Using ElectricService Request FormFor the latest authorized version, please refer to the company s website at for Electrical InstallationsCovering National Grid s Service Areas inMA, NH, NY, and RI2010 National Grid / specification for Electrical Installations / April 2010 For the latest authorized version, please refer to the company s website at For the latest authorized version.

5 Please refer to the company s website at Grid / specification for Electrical Installations / April 2010 PREFACEThis April 2010 edition of the Specifications for Electrical Installations is effective as of June 2010. These Specifications consolidate and replace both the Electric System Bulletin No. 750 and Information and Requirements for Electric Service Green Book and are in effect for the following National Grid companies:Granite State Electric CompanyMassachusetts Electric CompanyNantucket Electric CompanyThe Narragansett Electric CompanyNiagara Mohawk Power CorporationThese Specifications , which protect the mutual interests of the Customer and Company, may be revised oramended from time to time in keeping with developments and progress of the industry.

6 For the latest official version of this document please visit the Company s web site address at: electricalspecifications. Printed copies of these Specifications are not document controlled and may be obtained from the Company by contacting the applicable Customer Service Center in Massachusetts for New England or Upstate New York. Therefore, the on-line version will always prevail over any uncontrolled printed referenced in tariffs by the National Grid companies, this new edition is synonymous with the designationsas ESB 750 Book or Information and Requirements Book and meets the same Grid / specification for Electrical Installations / April 2010 For the latest authorized version, please refer to the company s website at OF CONTENTSPREFACE.

7 1 TABLE OF CONTENTS ..2 PROCESS AND INFORMATION ..9 Obtaining Electric Service ..9 Electric Service Grid in Massachusetts: ..11 National Grid in New Hampshire:..13 National Grid in Upstate New York: ..14 National Grid in Rhode Island: ..20 Safety the A GENERAL INFORMATION .. INTRODUCTION .. SCHEDULE .. AND TIME REQUIREMENTS .. , STANDARDS, AND REFERENCES ..23 Figure Illustration Utility Electric Supply and Premises .. Company Specifications .. FOR S RESPONSIBILITY .. Customers .. served at voltages above 600 volts .. S RESPONSIBILITIES .. , WIRING ADEQUACY, AND ENFORCEMENT .. Approval .. of Electricity .. of Service .. Warranty OF COMPANY REQUIREMENTS.

8 Criteria .. of Electrical Energy .. 2-1: Typical Service installation Diagram Below 600 volts Excluding SERVICE CONNECTION REQUIREMENTS .. FOR SERVICE .. grants and special permits .. OF SERVICES .. Respect to Building and Delivered Through More Than One Meter .. Service Requests .. SERVICE ..363 For the latest authorized version, please refer to the company s website at Grid / specification for Electrical Installations / April 2010 Facilities .. OF EMPLOYEES .. OF SERVICE .. AVAILABLE .. Services ..37 Table - Available Services Below 600 Customers (Applicants) .. Customers .. Expansion .. Migration at Customer s Request.

9 Migration at Company s Request .. NO LONGER STANDARD .. BALANCE .. IN SERVICE .. ATTACHMENTS .. OF SERVICE ..40 PART B ELECTRIC SERVICE REQUIREMENTS .. , Easements .. , Routing and Location of Service Laterals or Service Lines .. of Service Laterals .. Voltage Drop .. Size-Single Phase Service Connections .. conductor Splicing .. of Metered and Unmetered Conductors .. Grease .. and Gas Meter Clearances ..43 Figure Electric Meter to Gas Meter Typical overhead Service Pole for Permanent or Temporary Service Below Temporary overhead Service Below 600 Temporary Underground Service Below 600 Alarm and Emergency Systems.

10 Fire Alarms .. Emergency Systems .. to Manufactured and Mobile Homes, Mobile Home Parks, and Recreational Vehicle Parks .. Service to Manufactured and Mobile Homes and Mobile Home Parks .. Service to Recreational Vehicle SECONDARY VOLTAGE SERVICE CONNECTION (UNDER 600V).. General ..48 Figure Typical overhead Service installation under Service Attachment, Location ..49 Figure Typical Residential overhead Service under 300 volts and 400 Customer-owned Service Pole ..504 National Grid / specification for Electrical Installations / April 2010 For the latest authorized version, please refer to the company s website at overhead Service Line Clearances.