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MIL-M-17413A(NAVY)
3.6.1.2 Temperature limits. - The motors shall be so designed as not to exceed the values of maximum per-
missible temperature in table V. The methods Of temperature measurements specified in table V
shall apply.
J These values shall be reduced by 10" C. in the case of open motors.
Note. - With but few exceptions, the values applicable to windings in table V are determined by the following
"hottest spot" allowances, based on the "hot spot" temperatures in Specification MIL-E-917 and appli-
cable to the various types of motor construction and methods of temperature measure:
Method of
Class of insulation
Motor enclosure
measurement
A
B
Open
Method 1 (thermometer)
25
30
40
Method 2 (resistance)
15
15
20
Protected, dripproof protected,
Method 1
15
20
30
splashproof and splashproof
Method 2
5
15
protected
Totally enclosed, fan-cooled
10
15
25
spraytight, fan-cooled
5
5
10
watertight, fan-cooled
Others
10
15
25
10
0
5

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