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4.6. Load wiring
All load wiring enters the Smartrack(s) by either the top or bottom load entry port
in the large centre section of the rack. Smartrack is primarily designed for load
wiring with single core cables in cableways, but may also be wired with three
core or multicore cables.
4.6.1 Installing load wires
Run in all load wires for each Smartrack or stack of Smartracks through
the top or bottom load cable entry port. Columns of cable tie anchors are
provided, for earth, neutral and phase wires respectively (see diagram).
Bunch wires together and tie bunches to cable tie anchors, peeling off the
wires for each power assembly at the appropriate row of cable tie
anchors. Trim to 33cm from the cable tie anchor to the cable end.
If multicore cables are used, distribute them evenly across the cable tie
anchors provided, and allow enough length at each power assembly level
to strip back the outer sheath sufficient to reach all terminals (allow 80cm).
Ensure that all wires are correctly labelled with circuit number and function
(phase, neutral or earth).
4.7. Identifying and testing power and load wiring
It is essential that all power and load wiring be correctly identified
and tested using a high voltage insulation tester, before installing
power assemblies or Smartrack electronics.
Use a low voltage tester to identify load pairs, and label accordingly, prior to
carrying out a high voltage insulation test.
Inspect for polarity and carry out a high voltage insulation test on all power feed
wiring.
Do not attempt a high voltage insulation test with any Smartrack
assemblies connected as this will destroy electronic components in
either the power assemblies or the control electronics.
Smartrack User Manual
page 19
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