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T.1.9 Tractive System Firewalls (EV Only)‌

T.1.9.1 Tractive System Firewalls must meet the requirements of T.1.8 above

T.1.9.2 Tractive System Firewalls must be composed of two layers: (see IN.8.1)

a. The layer facing the Tractive System must be:

 Made of aluminum with a thickness between 0.5 and 0.7 mm

 Grounded according to EV.7.7 Grounding

b. The layer facing the Driver must be:

 Made of an electrically insulating and Nonflammable Material (F.1.18). The second layer must not be made of CFRP.

 Sufficient thickness to prevent penetrating this layer with a 4 mm wide screwdriver and 250 N of force.

This is a check that may be performed at Tech Inspection, not a design criteria

T.1.9.3 Conductive parts other than the Chassis must meet one of:

 Not protrude through the Firewall

 Be properly insulated on the driver side

T.1.9.4 When Outboard Wheel Motors EV.5.1.3 are mounted at the wheels, the line of sight requirement of T.1.8.3 above does not apply to components at the wheels or on the front control arms.

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