How-To
Panel How-To
Panel How-To in industrial control systems — covering 6 topic areas in the CurryControls.com controls and automation knowledge hub.
Written guides in this section
Full references, procedures, and diagnostic guides published under Panel How-To.
How to Select Surge Protection
Select the surge protective devices for a control panel and its field circuits: list every conductor that enters, classify its exposure, choose the device type and ratings for the power, the loops, and write it into the drawings and the I/O list.
8 min readUpdated Sep 5, 2026
How to Size an Enclosure
Size a control panel enclosure so that everything fits, cools, and can be worked on: lay out the components with their clearances and wireway, add the spare space the plant will need, and mounting before ordering.
8 min readUpdated Sep 5, 2026
How to Calculate a Panel SCCR
Determine the short-circuit current rating of a control panel by the UL 508A Supplement SB method: list every power circuit component, find each rating, apply published series combinations and current limiting, and mark the panel with the lowest result.
10 min readUpdated Sep 5, 2026
How to Build Terminal Schedules
Produce the terminal schedule that lets a technician find any wire: define the strips and their numbering, list every terminal with its wire numbers, the device and the field destination, and keep it current through every change.
7 min readUpdated Sep 5, 2026
How to Design Panel Grounding
Design the grounding and bonding of a control panel and its site so that faults clear, signals are clean, and surges have a path: bond the enclosure and everything in it, and verify with measurements before the panel is energized.
8 min readUpdated Sep 5, 2026
How to Size a Control Panel Power Supply
Add up the real load, account for inrush and simultaneity, add headroom, and check the heat you just added to the enclosure.
7 min readUpdated Aug 14, 2026
Topics in this area
Size a Power Supply
Add up the real load, add headroom, and account for inrush.
Select Surge Protection
Select Surge Protection — practical reference notes for controls engineers, integrators, and technicians working with panel how-to.
Size an Enclosure
Size an Enclosure — practical reference notes for controls engineers, integrators, and technicians working with panel how-to.
Calculate SCCR
Calculate SCCR — practical reference notes for controls engineers, integrators, and technicians working with panel how-to.
Build Terminal Schedules
Build Terminal Schedules — practical reference notes for controls engineers, integrators, and technicians working with panel how-to.
Design Grounding
Design Grounding — practical reference notes for controls engineers, integrators, and technicians working with panel how-to.
Direct contact
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