Technical Data
Effective: May 1998
Page
35
TD.44A.01.T.E
Cutler-Hammer
Magnum DS
Metal-Enclosed
Low-Voltage Switchgear
Features – Wiring
Cable Compartment — The cable com-
partment gives ample room for termi-
nating the power cables. Removable
top roof sheets allow for easy conduit
hub installation. The floor of the cable
compartment is open to allow cable
entry from underground duct banks.
Optional floor plates are available.
Optional grounded metal barriers iso-
late the main bus and connections
from the cable compartment, as well
as optional barriers to separate adja-
cent cable compartments.
In addition to cable, Pow-R-Way
Busway and nonsegregated Busduct
can be terminated in the compartment.
Lug Pad — The lugs are located on the
breaker run-backs to accommodate lug
orientations at a 45
°
angle to reduce
the bending radius of the cable needed
for making the connections, thus
reducing installation and maintenance
time. Mechanical setscrew type lugs
are standard. Optional NEMA 2-hole
compression lugs are available as an
option.
Control Wireway — An isolated verti-
cal wireway is provided for routing of
factory and field wiring in each switch-
gear section. Breaker secondary termi-
nal blocks are mounted as standard
above each circuit breaker. The termi-
nal blocks are rated 30 amperes and
will accept bare wire, ring or spade ter-
minals for wire size ranges of #22 to
#10. Extruded loops are punched in
side sheets of the vertical wireway to
allow securing of customer control wir-
ing without the use of adhesive wire
anchors.
For applications involving excessive
wiring, or nonstandard terminal
blocks, terminal blocks are mounted
on the rear frame with the power
cables where they are readily accessi-
ble for customer’s connections and
inspection.
Control Wireway
Control Wire — Standard wire is Type
SIS insulated stranded copper, extra
flexible No. 14 AWG minimum.
Secondary Terminal Compartment
Door — The customer’s secondary ter-
minal connections are located behind
a separate door providing access to
these connections without the need to
open the breaker compartment door.
Secondary Control Terminals
Short Circuiting Terminal Blocks —
One provided for each set of instru-
mentation or relaying application cur-
rent transformers.
Shipping Split Connection — At each
shipping split, the control connections
are made with plug-in terminal blocks
rated 600 volts, 40 amperes. The ter-
minal blocks interlock mechanically
without removing the line or load con-
nections. This method of making the
shipping split control connections
increases the speed of installation
and reduces the potential of incorrect
connections.
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