Omni Installation Instructions
Page 76 © Mass Electronics Pty Ltd 2017Edition 1.2 dated 20.08.2018
5-1.1.2 Electrical Inspection
•Make sure all sources of electrical power, including power to ancillary items are o
•Check all input and output connections against the computer-generated wiring diagram supplied
for your installation
•Ensure all connections are in accordance with the wiring diagram and that connections are solidly
made
•Ensure all enclosures are solidly earthed
•Check all input and output cabling; ensure cabling requirements of Section 3 - Electrical
Installation are met
•Make sure all cables are routed clear of high current, high voltage or high speed switching current
cables and other sources of interference
•Inspect all cables running external to the enclosure. Ensure they are free from potential
mechanical damage, such as impacts and chafing
Cabling plays an important role in the installation of Omni Systems. The following general cabling
guidelines should be observed:
•In all cases, use electromagnetic-shielded cable for sensor wiring
•When necessary to protect cabling from physical damage, both shielding and physical protection
may be provided by running the cable in a metal conduit. Alternatively, use steel wire armoured
(SWA) cable, which also contains an electromagnetic shield
•Avoid running cables in the vicinity of high voltage power cables or cables carrying switching
voltages/currents. This especially applies to sensor signal cables
•Interconnecting cables must have multi-strand conductors with a cross-sectional area of 1mm
2
for
each conductor
•The earth cable to Omni enclosures must be 2.5mm
2
Table 3-1 provides assistance in determining the cabling requirements for various installation
configurations. It shows the dimensions, wire gauge designations and resistance values per unit
length for common wire sizes. Use Table 3-1 to determine specific cabling requirements for your
installation.
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