ETC Matrix MkII Rack - Manual (Page 15)

Installing Main Supply Cables
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3
Section 3
Installing Main Supply Cables
WARNING:
Ensure that it remains impossible to apply power to the main supply
cable while installation of the main supply rack connections are being
made. Ideally, connect the main supply cables to the dimmer racks
before making connections to the supply switchgear. IT MUST NOT BE
POSSIBLE TO ACCIDENTALLY APPLY POWER TO THE RACK
DURING THIS INSTALLATION PROCESS.
Matrix II racks may be ordered with a 400A internal bus bar/fuse assembly which is located on the
right side of the rear of the rack (rear access racks) or on the left side from the front (swing frame
racks). The bus bar may be used for either top or bottom cable access points and is factory fitted for
bottom cable access as shown here.
Cable Access
To install main supply cables from the top or bottom of the rack
Note : Cable termination to Matrix MkII racks is made using M10 bolts. It is the installers responsibility
to provide and terminate a suitable lug for the size and type of cable in use in an installation.
•
Determine desired cable entry point (top or bottom).
•
Remove the fuse cover panel (rear access rack) or the bus bar
termination cover (swing frame rack).
•
Dress the feeder cables neatly into the rack and support them using
the perforated strap bars in the side of the rack to reduce
mechanical stress on the bus bar terminations.
•
Once the cables are run to the desired termination point, strip the
cables and terminate the lugs to them, following the instructions
from the lug manufacturer.
•
Secure the lug to the phase bar using the provided M10 bolt and
spring washer (see diagram).
•
Tighten the bolt to 55 N-m (40 lb-f) using a torque wrench. (The
55Nm torque is the suggested tightness for standard engineering
steel bolts.)
•
Repeat for all phase and neutral connections.
•
Locate the three snap-
on ferrite toroids that are
provided with the
installation kit. Snap
each ferrite to the mains
input protective earth
(PE) cable. Stack the
ferrites together on the
cable and secure each
with a cable tie (not
provided). Optionally
add a cable tie on the
ground cable at each
end of the ferrite toroids
to avoid movement on
the cable.
CAUTION:
Ensure that supply cables are adequately
supported to avoid any strain to the bus bar
connections.