GE Industrial Solutions Spectra Series Power Panelboards AMCB4GB and AMCB6GB - Manual (Page 5)

8. Install the terminal cover. Install the terminal cover
over the center of the assembly, as shown in Figure 23.
Secure the cover with thread-cutting screws [15].
Figure 23. Installing the terminal cover over the breaker terminals.
9. Tighten the strap connections. Tighten the bolted
strap connections to the vertical bus to 65 in-lb. It may
be necessary to remove an adjacent breaker to allow
access to the bolted connections at the vertical bus.
10. Insulate unused strap surfaces. The double-branch
assembly may be installed with only one active circuit
breaker and the other branch left open for future use.
In this case, insulate the exposed surfaces of the strap
contact blocks in the unused branch. Cover the
contact surfaces with two layers of a UL-recognized
105° C thermoplastic tape (OANZ2, such as Permacel
P-30-105 or 3M 66R) to achieve a minimum insulation
thickness of 0.013 inch.