National Grid 2006 Annual Report Download - page 14

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The following table reflects weather normalized volumes.
New England Customer Classes
■Residential customer sales are to single, as well as multi-family, residences and group homes,
farms, and religious institutions (churches, schools, seminaries, retreats, conference centers,
etc.).
■Commercial sales are to small and large commercial accounts including offices, warehouses,
retail, hotels, restaurants, hospitals/health, government and street lighting.
■Industrial sales are to small and large industrial accounts, including plants, factories, mills and
any other establishments primarily engaged in the manufacturing of finished, intermediate,
durable or non-durable goods.
New York Customer Classes
■Residential customer sales are to single, as well as multi-family, residences and group homes,
farms, and religious institutions (churches, schools, seminaries, retreats, conference centers,
etc.).
■General Service sales consist of commercial accounts and light industry served under stan-
dard tariff provisions.
■Large Time-of-Use sales encompass the heavy industrial as well as several very large com-
mercial campuses (educational and health care) and customers receiving discount power
under special contracts and station stand-by service.
■New York Power Authority (NYPA) are sales generally made to large industrial loads that are
supplied from the Niagara Falls Power Project through Company owned transmission lines.
NYPA sales also consist of NYPA administered discount power through the Economic
Development Power program and the Power for Jobs programs. Customers whose power
contracts expire and who subsequently continue to purchase power from Niagara Mohawk
are accounted for in either large time-of-use sales or general service sales. Other accounts are
primarily Street and Highway Lighting as well as Private Area Lighting.
Seasonality & Weather impacts
Electricity customer load varies by season, usually peaking in the winter and summer months. The
lower and higher temperatures in those months drive higher electricity sales as more electricity is
used for heating or cooling during those months. The Company’s service territories experienced
more extreme weather temperatures during fiscal year 2006 (with higher than average tempera-
tures in the summer months).
Weather had a positive impact on consolidated electric margin of approximately $24 million for the
year ended March 31, 2006.
14
National Grid USA / Annual Report
Electric Sales Volumes (GWh)
Weather Normalized
2006 2005 2004 FY06 vs FY05 FY05 vs FY04
New England:
Residential 12,027 11,771 11,515 2.2 2.2
Commercial 13,448 13,303 13,015 1.1 2.2
Industrial/Other 5,312 5,440 5,434 (2.4) 0.1
Total - New England 30,787 30,514 29,964 0.9 1.8
New York:
Residential 11,210 11,075 10,932 1.2 1.3
General Service 11,319 11,116 10,778 1.8 3.1
Large Time-of-Use 6,877 7,264 6,736 (5.3) 7.8
NYPA/Other 5,109 5,280 5,596 (3.2) (5.6)
Total - New York 34,515 34,735 34,042 (0.6) 2.0
Total - New England and New York 65,302 65,249 64,006 0.1 1.9
% Change