ApplicabilityTests CL12a and CL12b are required for EEEs not being subjected when used to water or mist projection.Test CL12c and CL12d are for EEEs potentially subjected on vehicle to direct humidity (projection, fog, mist…). Their goal is to ensure proper protection of EEEs (tight housings, encapsulation in resins, joints…).Test CL12e is a condensation test which has to be performed when the EEE is subjected to water vapor condensation phenomena.Endurance to humid and contaminated atmosphere must be performed on any equipment. The choice of CL12x depends on location in vehicleEEE without any contact with water or mist: - CL12a or CL12b, - and CL12e. EEE with direct contact with humidity (splash water, mist …): - CL12c (or CL12f for specific equipment), - and CL12d for equipment with aluminium housing and plastic connector, and CL12e