IEEE 420:1982

Revision Standard - Superseded.
Design requirements that are unique to Class 1E control boards, panels, and racks are specified. Standards for qualification tests to verify that these design requirements have been satisfied are provided. This standard is not intended to define the selection, design, or qualification of piping, modules, or other equipment mounted on the Class 1E control boards, panels, or racks. It is concerned, however, with the effect such mounted equipment has on the design and qualifications. Qualification and testing of individual Class 1E control board components and modules and external field-run cables are not covered.

This standard specifies those design requirements which are unique to Class lE control boards, panels, and racks and provides standards for qualification tests to verify that these design requirements have been satisfied. It does not apply to:
1) Non-Class lE components and modules except as they may affect the design and qualification of Class lE control boards, panels, and racks
2) Qualification and test of individual Class lE control board components and modules
3) External field run cables
The purpose of this standard is to specify the design requirements for Class lE control boards, panels, and racks and to establish the methods to verify that these requirements have been satisfied.