rack panel
rack panel
[′rak ‚pan·əl] (electronics)
A panel designed for mounting on a relay rack; its width is 19 inches (48.26 centimeters), height is a multiple of 1 ¾ inches (4.445 centimeters), and the mounting notches are standardized as to size and position.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.