7
Notes and warnings
PRC-E Series Instruction Manual
MN014003EN August 2015 www.eaton.com
The BCBs have an alternating orientation in the panelboards.
The first (left) BCB has the control module down while
the right module is up. This orientation is critical to proper
operation of the PRC intelligent panelboard.
otee:
N
Failure to observe the proper orientation of the BCB
in the panelboard will create difficulty associating the
software circuit numbers with the actual controllable
circuit breaker position.
The following steps will guide you through proper wiring of
the BCBs and the PRC-E Series controller.
The same type cable is used between the PRC-E Series
externally mounted controller cabinet and the first BCB as is
used between BCB modules. Once the cable is routed, it can
be trimmed and terminated with the supplied 4-pin connector.
Step 1e:
BCB SLAN/power termination.
For external controller applications, feed a free end of the
recommended cable through a conduit from the control
cabinet into the PRCEP panelboard. Route the cable to the
BCB nearest the panelboard’s entry point. Route the cable
through the wiring gutters at the top, bottom, and sides
of the panelboard. It is not required to use conduit for
internal BCB interconnects as the cable used has a 600 V
insulation rating. It is, however; recommended that the
wire connection between the BCB modules inside a
PRC-E Series or PRCEP panelboard be dressed and tied to
prevent chaffing and minimize interference with load wires
in the gutter.
otee:
N
The layout shown in
Figure 9
is recommended but
it is not necessary to follow the sequential order
from the controller to the BCBs nor is it required to
have the PRC-E Series controller at the end of the
daisy-chain.
Cut the cable to length allowing for some excess to facilitate
plugging and unplugging the cable for service purposes.
Step 2e:
Stripping and terminating the cable.
Locate one of the 4-pin plugs, either inserted into the BCB
or in the parts bag, strip the jacket back to a maximum of
1-1/4 inches. Be careful not to nick or cut the insulation of
the individual conductors. Strip each conductor to expose no
more than 1/4-inch of bare wire.
Using
Figure 10
for reference, insert each colored conductor
in the proper position on the 4-pin plug.
Figure 10 . BCB Connector Wire-Out
otee:
N
Both connectors on the BCB have the same wire-out
relationship and are internally connected. If there
is any doubt about the color positions, plug one
terminated end into the BCB and wire the newly
installed cable to match.
Step 3e:
UL
T
consideration.
For UL-approved isolation of the SLAN/power connection
from the high voltage section of the panelboard, the
connector screw terminals must be covered.
Insulation heat-shrink tubing in lengths of 6 inches long
are included in the panelboard parts bag. Cut this tubing
in half and slip one length over the plug and cable prior
to plugging it into the BCB. Then slip the tubing over the
cable and plug so the green connector and screws are
completely covered. DO NOT apply heat to heat-shrink
tubing around the connector, as this will make subsequent
servicing difficult.
Figure 11
shows two views of the BCB.
The left view shows the wires terminated into the 4-pin
plug and the 3-inch heat-shrink tubing ready to be dressed
over the connection. The right view of
Figure 11
shows the
completed cable termination. If this is the last BCB in the
chain, place the remaining 3-inch piece of heat-shrink tubing
over the unused plug. Given the inversion of the right-side
BCB (invert
Figure 11
) it is recommended to place a few
wraps of electrical tape around the insulation tubing and the
wire to prevent the insulation from slipping off the green
connectors. If only one cable is terminated to the BCB, use
the tubing to insulate the unused connector as well.
Figure 11 . BCB UL Considerations
Step 4e:
Connecting BCB modules.
Repeat Steps 1 through 3 to connect the remaining BCB
modules together. Use the second connector on the BCB to
continue to chain the BCB modules as illustrated in
Figure 9
.
PWR
COM
SLAN+
SLAN–