Document ID: chunk:federal_register_of_legislation:F2023L01526:body:0:p19
Version: federal_register_of_legislation:F2023L01526
Segment Type: other
Provision Reference: 
Character Range: 53758–56877

the REESS may be disconnected.
         5.1.4. Protection against water effects.
         The vehicles shall maintain isolation resistance after exposure to water (e.g. washing, driving through standing water). This paragraph shall not apply to electrical circuits that are galvanically connected to each other, where the DC part of these circuits is connected to the electrical chassis and the specific voltage condition is fulfilled.
         5.1.4.1. The vehicle manufacturer can choose to comply with requirements specified in paragraph 5.1.4.2., those specified in paragraph 5.1.4.3., or those specified in paragraph 5.1.4.4.
         5.1.4.2. The vehicle manufacturers shall provide evidence and/or documentation to the type-approval authority or technical services as applicable on how the electrical design or the components of the vehicle located outside the passenger compartment or externally attached, after water exposure remain safe and comply with the requirements described in Annex 7A. If the evidence and/or documentation provided is not satisfactory the type-approval authority or technical services or testing entity as applicable shall require the manufacturer to perform a physical component test based on the same specifications as those described in Annex 7A.
         5.1.4.3. If the test procedures specified in Annex 7B are performed, just after each exposure, and with the vehicle still wet, the vehicle shall then comply with isolation resistance test given in Annex 5A, and the isolation resistance requirements given in paragraph 5.1.3. shall be met. In addition, after a 24 hour pause, the isolation resistance test specified in Annex 5A shall again be performed, and the isolation resistance requirements given in paragraph 5.1.3. shall be met.
         5.1.4.4. If an isolation resistance monitoring system is provided, and the isolation resistance less than the requirements given in paragraph 5.1.3. is detected, a warning shall be indicated to the driver. The function of the on-board isolation resistance monitoring system shall be confirmed as described in Annex 6.
         5.2. Rechargeable Electrical Energy Storage System (REESS)
         5.2.1. For a vehicle with a REESS, the requirement of either paragraph 5.2.1.1. or paragraph 5.2.1.2. shall be satisfied.
         5.2.1.1. For a REESS which has been type approved in accordance with Part II of this series of Amendments to this Regulation, it shall be installed in accordance with the instructions provided by the manufacturer of the REESS, and in conformity with the description provided in Annex 1, Appendix 2 to this Regulation.
         5.2.1.2. The REESS including related vehicle components, systems and structure as applicable, shall comply with the respective requirements of paragraph 6. of this Regulation.
         5.2.2. Accumulation of gas
         Places for containing open type traction batteries that may produce hydrogen gas shall be provided with a ventilation fan or a ventilation duct to prevent the accumulation of hydrogen gas.
         5.2.3. Warning in the event of failure in REESS
         The