SMA E-Panel installation manual
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Appendix E Exchanging Bus Bars
Slave units are shipped with red AC in and out wires as well as red bus bar mounts. It may be desired
to change to another color to identify a different phase.
MNSBB-R
Red Bus Bar and mounts
MNE250SMA-SLAVE
Emboss for Bus Bar mounting
Bus Bar mounting
block locating hole
To exchange MNSBB Bus Bar mounts for another color.
First remove any wires that will be replaced with the new color.
Next, remove the plastic cover.
To remove the Bus Bar press back gently on the tab on the top of the mounting block and lift up on the bus bar.
After the Bus Bar is removed then remove the screw in the mounting base and set aside. Repeat for the other
mounting block.
Place a mounting block of the new color in place of the previous colored ones. The mounting block has a small
pin formed in the base that goes into the bus bar mounting block locating hole shown above.
The screws supplied with the original mounting blocks are of the threadforming type.
Important! If the screws are overtightened they may strip. If this should occur simply replace the screw with a
10-32 Panhead machine screw and nut.
Hint! Holding the mounting blocks apart and in a straight line while tightening them will make it easier to
reinstall the terminal block.
Replace the snap on terminal block cover and install wires tightening them according to the torque chart in
Appendix C on page 43.
Additional long or short bus bars
may be installed in unused
mounting points
Common mounting for short
and long bus bars
Short bus bars mount here
Long bus bars mount here
A long or short bus bar may be
installed in some locations.
If installing a bus bar for the
first time in any location use
#10 threadforming screws.
