EZAutomation EZ 10 Series, Getting Started Manual, Page: 12 / 69

6 | P a g e
Cabinet Wiring
The wiring of the EZ12 unit to the “field” outside the cabinet must be by design. The wiring cannot be random in
order to get the various points of the cabinet and the “field” electrically connected. Below are some general rules
that apply in most situations:
• Provide a separate power source to electronic controls and keep this power bus away from any I/O
power.
• The cabinet should be wired with a safety ground (the main safety ground wire gauge is determined by
the cabinet's total current consumption) and in accordance with all electrical code requirements.
•
Once the cabinet doors, stationary sub-panels and swing-out sub-panels have been “strapped to the main
cabinet, it is not necessary to run safety ground wires from the equipment chassis terminals to the main
safety ground connection.
•
The safety ground terminal of each component can, and should be, connected with the shortest wire
possible, to the cabinet or sub-panel frame.
• Plan the wiring routing. Keep all switched power in separate ducts and if there is AC and DC power being
switched, keep the wiring of each branch separate from all wires and cables carrying low level signals.
• Keep all three phase power outside of the cabinet, but if it becomes necessary, keep the runs as short as
possible and maintain the maximum possible distance between the three phase bus and all other wiring.
•
Primary power leads to the control equipment (Base power terminals) should be made with a two wire
twisted cable with approximately 12 turns per foot. The length of these cables should be kept to a
minimum, and to the greatest extent possible, such cable runs should be kept separate from other wiring.