The invention relates to an electrical machine, preferably an alternator for motor vehicles, comprising a rectifier assembly that is fixed to an end shield of the machine. In an embodiment, the system comprises a closed or concave outer wall about a closed or concave inner wall. Normal read operations are also performed to obtain read data. The electronic circuitry may transition from the active state back to the inactive state after the data signal has been provided and the present code scanning operation is complete. A flame retardancy of the article measured in accordance with the UL-94 test preferably scores HB or higher. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.