Preface P–9
Publication 1336 IMPACT-6.2 – March 1998
Drive Rating Qualifications
Several factors can affect drive rating. If more than one factor exists,
derating percentages must be multiplied. For example, if a 14-amp
drive is installed at a 2km (6,600 ft.) altitude and has a 2%
high-input line voltage, the actual amp rating is: 14 x 94% altitude
derating x 96% high-input line derating = 12.6 amps
Enclosure Type
The first character, A, indicates the Enclosure Code.
The second character indicates the type of enclosure shipped from
the factory:
Table P.I
Enclosure Type Code Description
Enclosure
Type Code
Description
N
A
E
F
J
Open style (IP00)
NEMA Type 1 (IP20)
NEMA Type 1 (IP20) “CE” Metal Cover
NEMA Type 4 (IP65)
NEMA Type 12 (IP54)
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