![img](MIL-PRF-1895300003im.jpg)
MIL-PRF-18953C(SH)
1.2.3 Current.
Type of Current
PIN Code
Alternating current (a.c.)
A
Not applicable
N
1.2.4 Voltage.
Voltage and Phase (frequency of a.c. is 60 Hz)
PIN Code
115-volt, single phase a.c.
1
220-volt, 3-phase a.c.
2
440-volt, 3-phase a.c.
4
1.2.5 Enclosures.
Enclosures
PIN Code
Spraytight
W
Explosion-proof
X
1.2.6 Maximum ambient temperature.
Ambient
PIN Code
Temperature
65 °C
6
80 °C
8
1.2.7 Structure.
Structure
PIN Code
Non-magnetic structure of fan and motor
NM
Not applicable
NA
1.2.8 Thermal protection.
Thermal Protection
PIN Code
Thermal protection is applied
TP
Not applicable
NA
1.2.9 Quiet bearing.
Quiet Bearing
PIN Code
Quiet bearing that meets MIL-B-18731
QB
Not applicable
NA
3
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