OPERATION AND MAINTENANCE MANUAL
MAC QM MOTORS
PAGE: 15
CODE: CTT42 EDITION: 01 RELEASE: JULY 2016
Subject to technical changes without prior notice
3.3.3
Degree of protection IP
The degree of protection of electrical machines is defined in accordance with IEC/EN 60034-5. Said standard specifies the
degree of protection of each machine using an ‘IP’ code, which comprises two digits:
- First digit: Indicates the degree of protection for contact and solid bodies.
- Second digit: Indicates the degree of protection for water.
The table below shows the meaning of each digit:
First digit
Protected against
Second
digit
Protected against
0
No special protection against the ingress of foreign
objects.
0
No special protection against the ingress of water.
1
Accidental contact with large surfaces, e. g. the back
of a hand. Ingress of foreign objects with a diameter
greater than 50mm.
1
Dripping water (vertically falling drops)
2
Contact with fingers. Ingress of foreign objects with
a diameter greater than 12mm.
2
Dripping water, when tilted up to 15 degrees from its
vertical position.
3
Contact with tools, wires, etc. with a diameter greater
than 2,5mm. Ingress of foreign objects with a
diameter greater than 2,5mm.
3
Spraying water at any angle up to 60 degrees from its
vertical position.
4
Contacts with tools, wires with a diameter greater
than 1 mm. Ingress of foreign objects with a diameter
greater than 1 mm.
4
Water splashing from any direction.
5
Complete protection against contact. Protection
against harmful dust deposits.
5
Water jets from any direction.
6
Complete protection against contact. Complete
protection against the ingress of dust.
6
Powerful water jets with increased pressure (sea).
7
Protection against temporary immersion under the
specified pressure and for the time specified.
8
Continuous immersion.
Table 6: IP code
For example, a machine defined as IP54 indicates complete protection against contact and water spraying from any direction.
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