3
Rough-in Conduit and Wiring
19
b: For the ribbon cable connected on the right rear side, release the tabs on
either side of the connector by sliding them opposite the connector then
gently pull the cable free.
c: For the two-wire cable on the right side, gently pull the connector straight out.
Step 5:
Remove the power supply access panel.
a: Align the panel perpendicular to the rack.
b: Slide the panel up approximately one inch to align the guide pins on the top
of the guided slots.
c: Then pull the panel straight out.
Modify Phase Bus for 120 VAC Split Phase Operation
The DRd rack can be simply changed in the field from a three phase rack to a split phase
(3 wire plus ground) rack.
Step 1:
Notice the two copper straps (stacked) on phase L2 of the rack.
Step 2:
Change the DRd rack from 3Ø to 1Ø operation by moving the copper straps in
the rack, strapping the phase bars together, (reference the graphic above to
follow along).
a: Move one of the copper straps to connect between phase 1 (L1) and phase
2 (L2). The screws required are installed to the phase bars in the location the
copper strap will be mounted.
N o t e :
Store this access panel in a safe place until you are finished roughing in conduit
and terminations. You will need to reinstall this panel when then rack enclosure is
installed and all wires have been terminated.
L1
L2
L3
N
L1
L2
L3
Step 1:
Step 2a:
Step 2b:
The rack door has
been removed from
this graphic for clarity
of this procedure.
