NIAGARA MOHAWK POWER CORPORATION D/b/a

PSC NO: 220 ELECTRICITYNIAGARA MOHAWK POWER CORPORATIONINITIAL EFFECTIVE DATE: APRIL 27, 2009LEAF: 1REVISION: 0SUPERSEDING REVISION:P.S.C. No. 220 ElectricitySUPERSEDING P.S.C. No. 207NIAGARA MOHAWK POWER CORPORATIONd/b/a NATIONAL GRIDSCHEDULEFORELECTRIC SERVICEAPPLICABLEINALL TERRITORY SERVED BY THIS COMPANYP.S.C. No. 220 Schedule for Electric Service ("P.S.C. No. 220 Electricity Tariff") supersedes and replaces formerP.S.C. No. 207 Schedule for Electric Service ("P.S.C. No. 207 Electricity Tariff") effective April 27, 2009 ("EffectiveDate"). As of the Effective Date, all references to P.S.C. No. 207 Electricity Tariff in agreements existing as of theEffective Date shall be construed as references to P.S.C. No. 220 Electricity Tariff.The Rule Numbers, Forms, and Service Classifications in P.S.C. No. 220 Electricity Tariff as of the Effective Date areidentical to those of P.S.C. No. 207 Electricity Tariff as of the day immediately prior to the Effective Date, but LeafNumbers may differ. To avoid any possible ambiguity resulting from this change, references to Leaf Numbers inP.S.C. No. 207 Electricity Tariff in agreements existing as of the Effective Date shall be construed as references to theequivalent Leaf Numbers for the same Rule Numbers, Forms, and Service Classifications in P.S.C. No. 220 ElectricityTariff.For detailed description of Territory, See General Information Leaf, Paragraph 1(Note: It will not be necessary to replace this title page in case at a laterdate the Schedule is made to apply to additional territory or area.)Subsequent changes will be effective as shown on individual leaves.Issued by Thomas B. King, President, Syracuse, NY

PSC NO: 220 ELECTRICITYNIAGARA MOHAWK POWER CORPORATIONINITIAL EFFECTIVE DATE: SEPTEMBER 19, 2009LEAF: 2REVISION: 1SUPERSEDING REVISION: 0TABLE OF CONTENTSGENERAL 32.33.34.35.36.37.38.39.40.41.42.TERRITORY TO WHICH SCHEDULE APPLIESRULES AND REGULATIONSDefinitions and AbbreviationsHow Service May Be ObtainedLimitation of the Service OfferCustomer Use of ServiceDisturbancesHighly Fluctuating LoadsMaintenance of Power Factor Corrective EquipmentResale, Remetering or SubmeteringService Re-establishment and Disconnection ChargesShort-term and Temporary ServiceDual ServiceStandby Service-CanceledAccess to PremisesDiscontinuance and Complaint Procedures and the Withholding of ServiceExtension of Overhead Electric LinesUnderground DistributionUnderground Extensions to Non-Residential DevelopmentsSubmarine Cable ExtensionsNetwork Area ServiceNon-Network Voltage in a Network AreaService Laterals - Below 15,000 VoltsService Laterals - Above 15,000 VoltsTransformer Vaults and SubstationsService Entrance and Building WiringMeterBilling, Meter Reading and CollectionsRevisionsSpecial Services Performed by Company for Customer at a ChargeDelivery Charge AdjustmentShared MetersAdditional Rules and Regulations - 25 Hertz Service-CanceledIncrease in Rates Applicable in Municipality Where Service is SuppliedPayment of Interest on Customer OverchargesEconomic Development ProgramsElectric Distribution Pole Attachment RatesNet Metering For Solar and Farm Waste Electric Generating EquipmentNet Metering for Wind Electric Generating EquipmentRenewable Energy Marketing ProgramRule 39 - Retail Access ProgramAdjustments to Charges Pursuant to the New York PowerAuthority Hydropower Benefit Reconciliation MechanismAdjustment of Charges Pursuant to the System Benefits ChargeCustomer Service Backout Credit MechanismIssued by Thomas B. King, President, Syracuse, NYLeaf 03209218221222

PSC NO: 220 ELECTRICITYLEAF: 3NIAGARA MOHAWK POWER CORPORATIONREVISION: 1INITIAL EFFECTIVE DATE: JULY 1, 2009SUPERSEDING REVISION: 0STAMPS: Issued in Compliance with Order of PSC in Case No. 09-M-0311 dated 6/19/09TABLE OF CONTENTSGENERAL 56.Transmission Revenue AdjustmentSpecification of Delivery VoltageNuclear Retirement Adjustment ClauseElectricity Supply CostAggregation of Electric Delivery ServiceAdministration of Standard Rate Service and Market Rate ServiceRenewable Portfolio SurchargeRetail Access Pilot Program-CanceledLocal Distribution Service-CanceledLump Sum Payment of Transition Costs by Customers TotallyBypassing the Company's Retail Distribution SystemStandard Interconnection Requirements and Application Process for New Distributed Generators2 MW or Less Connected in Parallel with Utility Distribution SystemsEmergency Demand Response Curtailment Program OfferingsDay-Ahead Demand Response Program OfferingsIncremental State Assessment Surcharge (“ISAS”)Leaf VICE FORMSService Application Form "A"Application for Electric Overhead Line Extension Form "B"Application for Electric Underground Line Extension Form "D"Application for Service Form - Form "C"Special Provision RiderRider for Separate MeterRider for Combined Metering and BillingNon-Residential Service ApplicationNon-Residential Deferred Payment AgreementSurety BondNon-Residential Customer Promise to Pay Bills Upon ReceiptResidential Deferred Payment AgreementApplication for Electric Standby Service Form "G"Service Classification No. 11 Agreement Extension Form "H"Customer Service Agreement for Service Classification No. 12 - Form "I"Standardized Contract for Interconnection of New Distributed Generation Units With Capacityof 2 MW or Less Connected in Parallel with Utility Distribution Systems - Form "K"Voluntary Emergency Demand Response Programs Form(s)Customer Service Agreement Form "M"Issued by Thomas B. King, President, Syracuse, 329346

PSC NO: 220 ELECTRICITYNIAGARA MOHAWK POWER CORPORATIONINITIAL EFFECTIVE DATE: SEPTEMBER 19, 2009LEAF: 4REVISION: 1SUPERSEDING REVISION: 0TABLE OF CONTENTS (continued)GENERAL INFORMATIONSERVICE CLASSIFICATIONSLeaf No.Residential and Farm Service, All Territory, S.C. No. 1349Residential and Farm Service-Optional Time-of-Use Rate, All Territory, S.C. No. 1-A - Canceled356Residential and Farm Service-All Territory, S.C. No. 1-B - Canceled357Residential and Farm Service - Optional Large Time-of-Use Rate, All Territory, S.C. No. 1-C358Residential and Farm Service - Optional Rate, All Territory, S.C. No. 1-H - Canceled369Small General Service, All Territory, S.C. No. 2370Large General Service, All Territory, S.C. No. 3378Large General Service, Time-of-Use Rate, All Territory, S.C. No. 3-A390Interruptible Electric Service, All Territory, S.C. No. 3-B - Canceled397Combined Firm and Interruptible Service, All Territory, S.C. No. 3 -C - Canceled398Untransformed Service to Customers Taking Replacement and/or Expansion Power fromNiagara Project of the Power Authority of the State of New York, Defined Territory, S.C. No. 4399Combined 25 and 60 Hertz Service to Customers Taking Such Service as of August 31, 1957 of thisSchedule, S.C. No. 5 - Canceled409Purchase of Electric Energy and Capacity from Customers with Qualifying On-Site GenerationFacilities, All Territory, S.C. No. 6410Sale of Standby Service to Customers With On-Site Generation Facilities, All Territory, S.C. No. 7415Large General Service-Hourly Integrated Pricing, S.C. No. 8 - Canceled442Large General Service – Supplemental Hourly Integrated Pricing Program, S.C. No. 9 – Canceled443On-Site Generation Bypass Deferral Service, S.C. No. 10 - Canceled444Individually Negotiated Contract Rates, S.C. No. 11444Special Contract Rates, S.C. No. 12449Issued by Thomas B. King, President, Syracuse, NY

PSC NO: 220 ELECTRICITYNIAGARA MOHAWK POWER CORPORATIONINITIAL EFFECTIVE DATE: APRIL 27, 2009LEAF: 5REVISION: 0SUPERSEDING REVISION:GENERAL INFORMATIONI.TERRITORY TO WHICH SCHEDULE APPLIES:NOTE: THERE ARE SIX NYISO LOAD ZONES/SUB-ZONES LOCATED IN NIAGARA MOHAWK'S FRANCHISECONTROL AREA. LOAD ZONE A-SUB-ZONE 1: FRONTIER; LOAD ZONE B-SUB-ZONE 29: GENESEE; LOAD ZONE CSUB-ZONE 2: SYRACUSE; LOAD ZONE D-SUB-ZONE 31: ADIRONDACK; LOAD ZONE E-SUB-ZONE 3: UTICA; LOADZONE F-SUB-ZONE 4: CAPITAL. Each LOAD ZONE/SUB-ZONE is broken down by City, County, Towns and their respectiveHamlets. The names of the Hamlets are indented under the name of the town in which they are located. Footnotes are located onthe last leaf of Rule No. 1.WITHIN IN EACH SERVICE CLASSIFICATION CONTAINED IN THIS TARIFF, THE NYISOLOAD ZONES WILL BE REFERRED TO AS LOAD ZONES A, B, C, D, E, AND F. A limited number of Customers locatednear subzone and/or franchise borders may not correspond to the Zone locations below. The customer’s electrical location isdetermined by the corresponding feeder and substation.LOAD ZONE A-SUB-ZONE 1 - FRONTIERSouthwest RegionAllegany CountyVillagesAndoverTowns and eIndependenceWhitesvilleNew HudsonBlack CreekScioScioWellsville*WillingCattaraugus lleTowns and HamletsAlleganyKnapp CreekAshfordWest ValleyCarrolltonCold SpringSteamburgEast OttoEast OttoEllicottvilleFarmersvilleFarmersville mestoneFranklinvilleFreedom*EltonGreat Valley*HinsdaleHinsdaleHumphreyHumphrey CenterIschuaIschuaLittle Valley*LyndonMachiasLime LakeMachiasMachias JunctionMansfieldNew Albion*OleanOttoOttoPerrysburg*PortvilleWeston MillsRandolphRed HouseRed HouseSalamanca*South ValleyOnovilleYorkshire*Issued by Thomas B. King, President, Syracuse, NY

PSC NO: 220 ELECTRICITYNIAGARA MOHAWK POWER CORPORATIONINITIAL EFFECTIVE DATE: APRIL 27, 2009LEAF: 6REVISION: 0SUPERSEDING REVISION:GENERAL INFORMATIONI.TERRITORY TO WHICH SCHEDULE APPLIES:LOAD ZONE A-SUB-ZONE 1 - FRONTIERSouthwest RegionChautauqua CountyCityDunkirkVillagesBemus PointPanamaSinclairvilleTowns and tauquaChautauquaDewittvillePoint ChautauquaClymerClymerNorth ClymerDunkirkElleryGreenhurstMaple licott(5)French CreekGerry*GerryPomfretHarmonyLily DalePortlandPortlandVan BurenRipleyNiobeWatts FlatsKiantoneMinaRipleySheridanSheridanFindley LakeNorth sStocktonErie CountyVillagesAngolaFarnhamTowns and HamletsBrantBrantN. CollinsEdenEdenN. CollinsLawtonsEvansCollinsCollinsDerbyNorth EvansCollins CenterIroquoisIssued by Thomas B. King, President, Syracuse, NY

PSC NO: 220 ELECTRICITYNIAGARA MOHAWK POWER CORPORATIONINITIAL EFFECTIVE DATE: APRIL 27, 2009LEAF: 7REVISION: 0SUPERSEDING REVISION:GENERAL INFORMATIONI.TERRITORY TO WHICH SCHEDULE APPLIES:LOAD ZONE A-SUB-ZONE 1 - FRONTIERFrontier RegionErie a(4)Concord*Grand IslandHamburg(6)Athol SpringsLakeviewWoodlawnTonawandaWest Seneca(7)Towns and HamletsAmherst*East ara CountyCityNiagara FallsNorth TonawandaVillagesLewistonYoungstownTowns and NewfaneAppletonNewfaneOlcottNiagaraPendletonBeach RidgeHoffman StationPendletonPendleton CenterWheatfieldBergholtzSt. JohnsburgShawneeWilsonPorterRansomvilleIssued by Thomas B. King, President, Syracuse, NY

PSC NO: 220 ELECTRICITYNIAGARA MOHAWK POWER CORPORATIONINITIAL EFFECTIVE DATE: APRIL 27, 2009LEAF: 8REVISION: 0SUPERSEDING REVISION:GENERAL INFORMATIONI.TERRITORY TO WHICH SCHEDULE APPLIES:LOAD ZONE B-SUB-ZONE 29 - GENESEEGenesee RegionErie CountyVillageAkron*Towns and HamletsAldenNewsteadGenesee CountyCityBataviaVillagesAlexanderLeroyTowns and ethenyEast BethenyAtticaOakfieldElbaCorfuByronSouth ByronByron CenterDarienDarienDarien t PembrokeStaffordStaffordLivingston CountyVillagesAvonLimaTowns and dGrovelandCaledoniaLivoniaGeneseo*LimaYorkSouth LimaLivoniaHemlockLakevilleLivonia CenterIssued by Thomas B. King, President, Syracuse, NYLinwoodPiffardRetsofWadsworthYork

PSC NO: 220 ELECTRICITYNIAGARA MOHAWK POWER CORPORATIONINITIAL EFFECTIVE DATE: APRIL 27, 2009LEAF: 9REVISION: 0SUPERSEDING REVISION:GENERAL INFORMATIONI.TERRITORY TO WHICH SCHEDULE APPLIES:LOAD ZONE B-SUB-ZONE 29 - GENESEEGenesee RegionMonroe CountyVillageBrockportTowns and MortonWalkerHoneoye ushIndustryRushWest RushSwedenWheatlandGarbuttMumfordNiagara CountyVillagesBarkerMiddleportWilsonTowns and setWilsonAppletonBurtNewfaneOlcottBeebePleasant CornersSunset BeachOntario CountyTowns and HamletsCanadiceEast Bloomfield*RichmondHoneoyeWest BloomfieldIoniaNorth BloomfieldOrleans CountyVillagesAlbionTowns and helbyYatesEagle HarborKendallKendallMurrayHulbertonFancherIssued by Thomas B. King, President, Syracuse, NY