HANDBOOK REQUIREMENTS - Central Maine Power Company

C. 120/208 volts, single-phase (network), three-wire,
(from four-wire system)--
For general
lighting and/or heating and cooking, and small
power
loads with motors generally not over 5 hp. Where
the total load exceeds 40 KVA, the Company may,
at its
option,
require the customer to arrange the wiring for three-
phase, four-wire service.
D. 120/208 volts, three-phase, four-wire, wye--
For large lighting loads,
or combination lighting,
heating/cooking
and power. Single-phase load shall be
balanced between phases in accordance with
Para. 305. See
also
Para. 302.
E. 120/240 volts, three-phase, four-wire, delta--
For
combination 120/240 volts, three- wire, single-phase
and 240 volts, three- phase service, where the load of
either
class substantially exceeds that of the other (not available
from Company padmount transformers). See also Para.
302.
F.
240 volts, three-phase, three-wire--
For installations supplying a total of not less than 5 hp. in
polyphase motors,
and/or large commercial heating
equipment (not available from Company padmount
transformers). Wherever three-phase service is already
available, the Company may, at its option and without
obligation to continue such service indefinitely, accept
additional installations requiring service for three-phase
motors of less than 5 hp. total. Note: due to the increase
in
electronics used in motor drives which may require a stable
grounded neutral, the Company
recommends four wire
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