INFORMATION & REQUIREMENTS ELECTRIC SERVICE - NStar

ARTICLE 303
Installations for customer convenience will be installed at the
customer’s expense. In any event, prior to ordering equipment
or starting a wiring installation involving both single phase and
three phase operation, the NSTAR New Customer Connect
Tech Center must be contacted regarding the characteristics of
the service to be supplied.Where electricity is delivered
through more than one meter, the cost of energy delivered
through each meter will be computed separately.
303. Service Characteristics
The following describes the characteristics and nominal
voltages of standard services, which are generally available.To
determine the type of service available at your location, please
contact the NSTAR New Customer Connect Tech Center. All
secondary voltage values stated herein are nominal, and are
subject to reasonable variations in accordance with the latest
revision of ANSI C84.
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NOTE:
The Downtown Boston Network District as
mentioned in this book is defined as Boston proper, Back
Bay, portions of the South End and the Fenway. (See map at
front of book.)
For the North districts -formally Boston Edison
A. 120/240 volts, single phase, 3 wire, service & 240
volts, three phase, 3 wire, Delta service
Generally available outside the Downtown Boston
Network District. Single phase motors are limited to 5
horsepower or less.Three phase service is required for
motors exceeding 5 HP in size.The maximum combined
single-and three phase load to be served from NSTAR
facilities in the public way is limited to 150 kVa where
available. Customers requiring service beyond this limit
ARTICLE 303
must provide suitable private property facilities for necessary
transformation as coordinated by the NSTAR New
Customer Connect Tech Center.
B. 480 volts, three phase, 3 wire, Delta service
Generally available where the customer provides suitable
private property facilities for necessary transformation.
C. 120/280 volts, single phase, 3 wire, service
Normally available only in the Downtown Boston Network
District for connected loads not greater than 200 amperes.
This service may be available upon consultation with
NSTAR. Larger services must be three phase, 4 wire.
D. 120/208 volts, 3 phase, 4 wire,Wye service
Within the Downtown Boston Network District, some
locations requiring loads up to 300 kVa (800 amperes) of
transformer capacity may be supplied from NSTAR facilities
in the public way. In locations where transformer capacity in
the public way is not readily available, the customer will be
required to provide suitable private property facilities for
the supply transformers. For loads exceeding 300 kVa (800
amperes), the customer must provide suitable private
property facilities for the supply transformers as
coordinated by the NSTAR New Customer Connect Tech
Center.
Outside the Downtown Boston Network District, the
customer may be requested to provide suitable private
property facilities for necessary transformation.
E. 277/480 volts, three phase, 4 wire,Wye service
Generally available except that the customer must provide
suitable private property facilities for necessary
transformation. Minimum demand loads are a requisite,
typically 75 kVa or larger.
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