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MIL-M-1743A(NAVY)
3.7 Motors for submarine service. -
3.7.1 Limitations. -
The nominal voltage and voltage range of motors shall be one of the following
3.7.1.1 Voltage -
as specified (see 6.2):
Voltage range
Nominal voltage
175-345
250
200-355
250
350-710
500
Special
special
3.7.1.2 D u t y . -
3.7.1.2.1 Continuous. - The duty of continuous rated motors shall be as specified in table VII.
Table VII - Duty of continuous rated motors.
3.7.1.2.2 Short time, varying or intermittent. - The duty cycle of these motors for the various
terminal voltages shall be as specified (see 6. 2).
The duty of special voltage motors shall be as specified (see 6.2).
3.7.1.2.3 Special voltage. -
The winding and speed classification of motors shall be one of those
listed under 3.2.5 or shall be special as specified (see 6.2).
3.7.3 Enclosure. -
The enclosure shall be one of those listed under 3. 2.7 or shall be special as
specified (see 6. 2).
3.7.4 Overspeed. -
3.7.4.1 For motors not requiring a field rheostat. - Motors not requiring a field rheostat shall with-
stand without injury a continuous speed equal to 110 percent of the warm no-load speed attained under the
conditions specified in 4.2.4.10.2.2.
3.7.4.2 For motors requiring a field rheostat. -  Motors requiring a field rheostat shall withstand
without injury the no-load speed attained under the conditions specified in 4.2.4.10.2.2.
The requirements of 3.7.4.1 shall apply.
3.7.4.3 Motors not having a definite no-load speed. -
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