Electrical Control Panel Design for Industry

Does your current project require Electrical Control Panel Design or PLC Panel Design?

Systems Engineering design-builds panels from as small as 12″ x 12″ up to massive 4 or 5 door enclosures.  Our panels are built to the UL508A standard and in accordance with the NFPA 79 Electrical Safety Standard. Our panels are designed and programmed by people who understand panels. Since we also support our and other vendor’s products, we are initimately familiar with the gotcha’s that make a maintenance person’s life miserable.

Standards Used in our Electrical Control Panel Design.Wiring of a Panel demostrating good electrical control panel design

  • Quality of our Electrical Control Panel Design
    • Designed by Registered Professional Electrical Engineers.
    • Our PDF drawings are smart.  Cross references can be clicked on to move you to the child device contacts.
    • Quality – Our panels are functionally tested before they leave our shop reducing field startup time.
    • Layout – High voltage components such as 480V motor wiring is kept seperate from control wiring.
    • Ethernet cables in high voltage areas are rated 600 volts.
    • We use 24VDC IO to minimize the danger of arc-flash.
    • 480Volts and higher are placed in a seperate control panel when possible to minimize suiting up in an arc-flash suit just to check a 24VDC input.
    • Any pneumatic circuits are placed at the bottom of the panel to eliminate condensation dripping on energized components.
  • Control Panel Wire and Device Identification
    • All wires have wire markers that identify the sheet on the schematic in which they occur.
    • All equipment is labeled with a device identifier containing the sheet number and drawing line number that the device appears on the schematic.
  • Protecting control panel wire over a door hinge.
    • Wiring across a hinge in a door is U looped (facing down) with screws or bolts holding the wire down.
    • We do not use “sticky backs” across doors.
    • Wiring over hinged areas are covered with spiral wrap to protect the wire from damage caused by pinching by the control panel hinge.
  •  Spacing between devices and wireways in the electrical control box is as follows:
    • 2″ for 24VDC.
    • 2 1/2″ – 3″ for 120VAC
    • 4″ for greater than 120VAC such as 208VAC or 480VAC.
  • Electrical Control Panel Design of Wiring
    • MTW stranded wire rated 600V 90 deg C is standard.
    • We use Carrol brand wire as it is flexible.
    • All internal panel wiring is in wire duct.
    • No wire ties inside of wire duct. This makes troubleshooting much easier when tracing wires.
    • Sufficient slack is left if wireways to prevent stress on wires but is not coiled in the wireway.
    • Wires are run in horizontal and vertical lines for a neat appearance.
    • Wire leaving a duct is brought to the front of the duct so that it helps hold other wires in the duct.
    • Wires are trained before placing in the wireway so they they do not pop up.
  • Standard Wire Sizes
    • 16 and 18 AWG MTW for 24VDC wires for 10A and 5A respectively.PLC using Good Electrical Control Panel Design
    • 14 AWG MTW for 120VAC wires.
  • Analog Cables
    • Analog cables are in 18 gauge, shielded twisted pairs, as default.
    • Heat shrink tubing is placed over the jacket cut and shield wire to prevent shorts.
    • Analog shields are grounded in one place only.
  • Wire Terminations
    • No more than 2 wires ever land under the same terminal.
    • Screw IEC terminal blocks.
    • DIN rails with terminal blocks are elevated to allow access to wire terminals.
    • DIN rails for terminals by the door hinge are angled to allow access to wires and ease of reading terminal block numbers.
    • All grounds are terminated on grounding terminal blocks or ground bus bars on the electrical control panel.

 

 

The electrical panel shop can provide more traditional controls such as pushbutton panels and meters for environments hostile to computer technology.  We stand ready to begin your electrical control panel design.