Enclosure for electronic modules

A device for preventing damage to a card cage by a circuit board, said card cage having a top, a bottom, a first side, a second side, a back and a front, wherein said top contains a plurality of top channels and said bottom contains a plurality of bottom channels, each of said top and bottom channels having a right side wall, a left side wall and a bottom, said channel bottom being substantially perpendicular to said first side and said second side, said bottom of said bottom channels being plated with conductive material to form part of a Faraday shield for preventing EMI/RFI radiation leakage from said card cage, said channels being oriented so that each top channel corresponds with a bottom channel to form a plurality of opposing channel pairs, each of said opposing channel pairs adapted to receive said circuit board, said circuit board having opposing edges in slidable engagement with one of said opposing channel pairs, said device comprising:

• a plurality of ribs plated with conductive material to form part of a Faraday shield for preventing EMI/RFI radiation leakage from said card cage and extending along said bottom of each said bottom channel of each of said opposing channel pairs between said right side wall to said left side wall to prevent said circuit board from contacting said channel bottom during said slidable engagement and wearing away said conductive material plated to said bottom of each said bottom channel, thereby preventing a breach in said Faraday shield sufficiently large to leak EMI/RFI radiation from said card cage.