Rockwell Automation 2364P Parallel DC Bus Supply Config. - Manual (Page 175)

Publication 2364P-5.01 December 1999
Installation 15-3
Overhead Bus Installation The overhead bus provides a common input for all the units in the
parallel configuration. If top entry will be used for the feeder bay,
make sure to remove the top plate, cut or punch the appropriate area
for the AC wiring, and replace the top plate before installing the
overhead bus.
To install the overhead bus, refer to the instructions in publication
2364P-5.10, titled Overhead Bus Installation.
Note: In R1, R2, S1, and S2-code configurations, the RGU input
leads need to be connected to the NRU bus stubs (on NRU circuit
breaker).
Internal Wiring Grounding
The parallel configuration has a PE ground busbar (as shown in
Figure 15.1), which allows a single point for grounding the parallel
configuration, and the entire system. PE should be connected to the
nearest building steel or substation ground using the appropriate wire
(consult the applicable electrical code, i.e. Table 250-59, NEC).
To simplify your grounding arrangement, you can splice the system
ground bus to PE, and connect any external device grounds to PE.
The parallel configuration also has a TE busbar (as shown in Figure
15.1), which is attached for grounding control signal shielding in the
system. TE should be connected to a separate earth ground at least 10
feet from the PE ground point (see Figure 15.2).
For wire sizes and additional grounding specifications, consult the
applicable electrical code documentation (i.e. Table 250-95, NEC).