4-20. REMOVE/INSTALL PANELBOARD ASSEMBLY.
This task covers:
General Mechanics Tool Kit, Appendix B, Item 1
Lockwashers, Appendix E
General Safety Instructions
Before performing any maintenance actions on electrical equipment
ensure all electrical power has been turned off. Death or serious
injury may occur from failure to do this.
Remove panelboard front assembly. See figure 4-11.
Turn off all equipment.
open all circuit breakers located in the panelboard.
Shut down the generator.
Disconnect power cable from the laboratory.
Remove four mounting screws and remove outside panelboard cover.
Remove timer bypass toggle switch hexnut, locking ring, and lockwashers.
Remove six screws and remove inside panel cover.
Remove timer bypass toggle switch. See figure 4-11.
Loosen terminals then tag and disconnect all wires.
Remove timer bypass switch.
Remove l00A circuit breaker. See figure 4-11.
Tag and disconnect all wires.