Snap-fit electromagnetic shield

An electrical machine comprising:

• a frame having an opening;
• and
• a shield snap-fit within the frame opening so as to shield circuitry internal thereto, the shield having;
• an insulative inner housing having a first base wall and a first pair of side walls and end walls extending therefrom defining a first cavity;
• a conductive shell having a second base wall and a second pair of side walls and end walls extending therefrom defining a second cavity, said second pair of side walls and said end walls having at least one outward bias positioned thereon;
• and
• an insulative outer housing having a third base wall and a third pair of side walls and end walls extending therefrom defining a third cavity, said outer housing being configured to snap-fit within an opening in a frame so as to shield circuitry internal thereto, said third cavity of said outer housing is configured to receive at least a portion of said conductive shield therein, said second cavity of said conductive shield configured to receive said inner housing therein,
• wherein said first cavity covers an unused connector port and eliminates a complementary mating terminal connector portion in the shield.

A method for providing electromagnetic shielding for an exposed unused connector port in electrical equipment, the frame having an opening approximately aligned with an exposed unused connector terminal, the method comprising:

• configuring an inner insulative housing having a first base wall and a first pair of side walls and end walls extending therefrom defining a first cavity;
• configuring a conductive shell having a second base wall and a second pair of side walls and end walls extending therefrom defining a second cavity, said second pair of side walls and said end walls having at least one outward bias positioned thereon;
• configuring an insulative outer housing having a third base wall and a third pair of side walls and end walls extending therefrom defining a third cavity, said outer housing being configured to snap-fit within the opening of the frame so as to shield circuitry internal thereto,
• inserting said inner housing into said second cavity defined by said conductive shell;
• and
• inserting at least a portion of said conductive shell having said inner housing into said third cavity defining said outer housing;
• wherein the assembled shield is snap-fit in place by the action of latch features extending into the first cavity mating with corresponding latch features extending from the exposed unused connector port.