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MX28B400 +24 VDC User’s Manual Page 13
Circuit Breaker Connections (1 to 50 Amps)
Connections for 1 to 50 amp dc loads require standard two-hole lugs with holes for #10 screws
on 5/8” centers and are located directly above the corresponding circuit breaker. The load
returns connect to the return bus located just above and rearward of the breaker connection
points as seen in Figure 3.6-4 The return bus provides 24 sets of threaded #10-32 holes on 5/8”
centers and four sets of threaded ¼-20 holes on ¾” centers for connection of two-hole lugs on
load return wires. Load Connections should be made as shown in Figure 3.6-4
Figure 3.6-4 Standard lug for 1 to 50A breakers.
NOTE: Load return lugs are connected to the front of the return bus to prevent interfering
with the top cover of the unit.
Circuit Breaker Connections (60-100 Amps)
Connections for 60 to 100 amp dc loads are twice as wide as the smaller breakers and therefore
require two positions and a circuit breaker adapter kit. The adaptor connects the two output lug
positions to one lug. Adaptors are available with studs for #10-32 nuts on 5/8” centers, #10-32
nuts on ¾” centers, or ¼-20 nuts on 1” centers. The adaptor is installed directly above the two
positions the circuit breaker is mounted on using #10 screws provided in the kit. The lugs (not
included with the kit) fasten on to the adaptor’s studs using nuts and washers provided in the kit.