4-25 REMOVE/INSTALL EXPLOSION PROOF DISTRIBUTION BOX ASSEMBLY.
This task covers:
General Mechanics Tool Kit, Appendix B, Item 1
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 distribution box assembly. See figure 4-17.
a. Turn off all equipment.
Open all circuit breakers located in the panelboard.
Shutdown the generator.
Disconnect power cable from the laboratory.
Remove 20 junction box cover plate bolts, and remove cover
Remove terminal board. See figure 4-17.
Loosen all terminal board terminal screws. Tag and disconnect all terminal wires.
Remove four panel mounting screws. Carefully withdraw mounting panel to gain access
to junction box interior.
Remove four terminal board screws, flat washers, and nuts from terminal board.
Remove defective terminal board.
Remove type M relay. See figure 4-17.
See paragraph 1 and perform steps a., b., and c.
Remove three screws, flat washers, and nuts from the mounting panel
Remove defective type M relay.