National Grid 2005 Annual Report Download - page 11

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 office, warehouse,
retail, school, hotel, restaurant, hospitals/health, government and street lighting.
■Industrial/Other sales are to small and large industrial accounts, including plants, factories,
mills and any other establishments primarily engaged in the manufacturing of finished, inter-
mediate, 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.
■NYPA/Other 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 New England and New York regions experi-
enced more extreme weather temperatures during fiscal 2004 (with higher than average tempera-
tures in the summer months and lower average temperatures in winter months).
Weather had a negative impact on consolidated electric margin of approximately $19 million for
the year ended March 31, 2005 and a positive impact of approximately $11 million for the year
ended March 31, 2004.
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National Grid USA / Annual Report
Electric Sales Volumes (GWh)
Weather Normalized
2005 2004 2003
FY05 vs FY04
FY04 vs FY03
New England:
Residential 11,771 11,515 11,008 2.2 4.6
Commercial 13,303 13,015 12,822 2.2 1.5
Industrial/Other
5,440 5,434 5,652 0.1 (3.9)
Total - New England 30,514 29,964 29,482 1.8 1.6
New York:
Residential 11,075 10,932 10,447 1.3 4.6
General Service 11,116 10,778 10,558 3.1 2.1
Large Time-of-Use 7,264 6,736 7,071 7.8 (4.7)
NYPA/Other
5,280 5,596 5,911 (5.6) (5.3)
Total - New York
34,735 34,042 33,987 2.0 0.2
Total - NE and NY
65,249 64,006 63,469 1.9 0.8
% Change