Product Manual

IEC Enclosure Protection Indexes
Like NEMA, IEC has designations indicating the protection provided by
a motor’s enclosure. However, where NEMA designations are in words,
such as Open Drip Proof or Totally Enclosed Fan Cooled, IEC uses a
two-digit Index of Protection (IP) designation. The first digit indicates
how well-protected the motor is against the entry of solid objects; the
second digit refers to water entry.
By way of general comparison, an IP 23 motor relates to Open Drip
Proof, IP 44 to totally enclosed.
LEESON and Lincoln stock General Purpose, ODP, motors are typically
rated at IP23 and our TEFC, General Purpose, motors are typically listed
as IP43 or IP54.
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Protection Against Protection Against
Solid Objects Liquids
No. Definition No. Definition
0 No protection. 0 No protection.
1 Protected against solid objects 1 Protected against water
of over 50mm (e.g. accidental vertically dripping
hand contact). (condensation).
2 Protected against solid objects 2 Protected against water dripping
of over 12mm (e.g. finger). up to 15° from the vertical.
3 Protected against solid objects 3 Protected against rain falling
of over 2.5mm (e.g. tools, wire). at up to 60° from the vertical.
4 Protected against solid objects 4 Protected against water splashes
of over 1mm (e.g. thin wire). from all directions.
5 Protected against dust. 5 Protected against jets of water
from all directions.
6 Totally protected against dust. 6 Protected against jets of water
Does not involve rotating comparable to heavy seas.
machines.
7 Protected against the effects of
immersion to depths of between
0.15 and 1m.
8 Protected against the effects of
prolonged immersion at depth.