1 Scope

This part of IEC 60721 classifies the groups of environmental parameters and their severities to which a product, not forming part of the vehicle, is subjected when installed on or in a ground vehicle. Such products are for example radios, communication systems, fare meters, flow meters for liquids transported by the vehicle, for example milk, petroleum products, etc. Vehicles where products can be permanently or temporarily installed include

• road vehicles: passenger cars, commercial vehicles, special vehicles, towing vehicles, trailers, mopeds, motorcycles,

• rail vehicles: trains, trams,

• tracked vehicles: excavators, cranes, rubber tracked vehicles,

• overland vehicles: four-wheel drive cars, tractors, snow scooters,

• handling and storage vehicles: fork-lift trucks (manual and robot), luggage transporters, and

• self-propelled machinery: diggers, harvesters.

Although this document is not intended for products forming part of the vehicles, the environmental condition classification can also be used for some exchangeable parts, installed in a similar way and in the same locations of the vehicle as products which do not form part of the vehicle. Only severe conditions which can be harmful to products are included.

Conditions of storage, transportation and handling are given in IEC 60721‑3‑1 and IEC 60721‑3‑2. Classification of storage and transportation environmental conditions are given in other subparts of the IEC 60721‑3 series.

Accidental incidents are not included, but it can be important to take their occurrence into account for products vital to the safety of the ground vehicle.