Protective Electrical Enclosure Wiring, Multiple Racks - Honeywell ControlEdge 900 platform Hardware Planning And Installation Manual

Figure 6-2: Protective electrical enclosure wiring, Multiple Racks
For 2 phase power source, external circuit breaker must be included
in both L1 and L2 for each rack.
See the following figure for redundant power supplies each with
external circuit breaker:
151