ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technic committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attion is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 20653 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical
and electronic equipment.
This second edition cancels and replaces the first edition (ISO 20653:2006), which has been
Protection of electrical equipment against foreign objects,
water and access
1 Scope
This International Standard applies to degrees of protection (IP code) provided by enclosures of the
electrical equipment of road vehicles. It specifies the following:
a) Designations and definitions of types and degrees of protection provided by enclosures of electrical
equipment (IP codes) for the:
— protection of electrical equipment within the enclosure against ingress of foreign objects,
including dust (protection against foreign objects);
— protection of persons against access to hazardous parts inside the enclosure (protection
against access);
— protection of electrical equipment inside the enclosure against effects due to ingress of water
(protection against water).
b) Requirements for each degree of protection.
c) Tests to be carried out in order to confirm that the enclosure complies with requirements of the
relevant degree of protection.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dat references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 12103-1, Road vehicles — Test dust for filter evaluation — Part 1: Arizona test dust
IEC 60068-2-68, Environmental testing — Part 2: Tests — Test L: Dust and sand
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
enclosure
part providing protection of equipment against certain external influences and in any direction
against access
3.2
degree of protection
protection provided by an enclosure against access, foreign objects and/or water and verified by
