Toshiba 4400 Series, Installation And Operation Manual

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45 4400 Series Installation and Operation Manual – 64527-008
FIGURE 9.7:
REMOVE INSTALLED LUGS
FIGURE 9.8:
INSERT NUT KEEP
3. Install the Bus Stubs
a. Thread a standoff insulator onto one of the two pem studs to the right of the breaker and tighten finger tight. ( Fig-
ure 9.9-A)
b. Thread the remaining standoff insulator on the remaining pem stud. (Figure 9.9-B)
c. Insert a bus stub into the circuit breaker’s upper nut keep. Secure it with the ¼” x 20 cap screw. (Figure 9.10)
d. Secure the bus stub to the standoff insulator with a ¼”x20 ½ in. Sems bolt. (Figure 9.10)
e. Repeat Steps c & d for the remaining bus stub.