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T.5.3.1 The rotating part of the Motor(s) EV.5.1 must be contained in a structural casing.
The motor casing may be the original motor casing, a team built motor casing or the original casing with additional material added to achieve the minimum required thickness.
Minimum thickness for aluminum alloy 6061-T6: 3.0 mm
If lower grade aluminum alloy is used, then the material must be thicker to provide an equivalent strength.
Minimum thickness for steel: 2.0 mm
T.5.3.2 A Scatter Shield must be included around the Motor(s) when one or both:
The motor casing rotates around the stator
The motor case is perforated
T.5.3.3 The Motor Scatter Shield must be:
Made from aluminum alloy 6061-T6 or steel
Minimum thickness: 1.0 mm