Common Pneumatic System Failures & How to Fix Them
February 28, 2025
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When it comes to UL 508A control panels, preparation is everything. For Original Equipment Manufacturers (OEMs), meeting UL 508A standards isn’t just about compliance, it’s about ensuring your control panels are safe, functional, and built to last. That’s why we’ve created a free, digital / printable UL 508A Pre-Flight Checklist to help you confidently prepare for certification.
UL 508A is the safety standard for industrial control panels in the United States. Developed by Underwriters Laboratories (UL), this certification ensures that panels meet essential electrical safety and performance requirements. It covers components such as motor controllers, circuit breakers, pushbuttons, relays, and more – all within enclosures rated for industrial use.
Whether you’re designing panels for HVAC systems, packaging machinery, conveyors, or process controls, UL 508A certification is a critical step in gaining customer trust and meeting regulatory demands.
Want to learn more about our UL-certified capabilities? Explore PennAir’s UL 508A Certified Panel Shop
A single oversight in your control panel design or documentation can delay certification or cause costly rework. Our UL 508A Pre-Flight Checklist is designed specifically for OEMs to ensure every box is checked before submitting your panel for certification.
This checklist covers:
Created by the experts at PennAir, our checklist reflects real-world issues we see during certification reviews. It also includes built-in notes sections and references to UL table standards like UL 508A Tables 31.1 and 44.2, NEC 250 for grounding, and guidance for environmental and enclosure-type alignment.
Best of all, this checklist is designed to streamline your review process, reduce rework, and improve first-pass success rates when submitting your panel for UL 508A certification.
Bonus: Is UL 508A Certification Even Required?
Not sure if your panel needs to be certified? Our checklist document includes clear guidelines on pages 3–5 explaining when UL 508A applies, including panels for cranes, HVAC, food processing, marine use, and industrial machinery.
Get the checklist OEMs are using to streamline certification and reduce project delays.
Download the Free UL 508A Pre-Flight Checklist
Ready to submit your completed checklist? Email it to PennAir’s Application Engineer Team at electricalpanels@pennair.com
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