Understanding the general differences between UL 508A and UL 698A is the first step in meeting the standards for engineering control panels. But before determining the specific content addressed in UL 508A and UL 698A, it must be asked, “How is a control panel...
Standards are everything when it comes to control systems engineering. Whether it’s high-performance practices for HMI development, iterative quality control for PLC programming, or peer-review design for industrial process control, enforcing standards is a critical...
As one of the most trusted safety certification organizations, Underwriter’s Laboratory (UL) is heavily involved in the work of the National Fire Protection Association when it comes to NFPA 70: National Electric Code (NEC). In fact, UL has helped to update and...
At first glance, the National Electrical Code (NEC) is an intimidating-looking book. Coming in at over seven hundred pages, it’s difficult to know where to begin. Thus, a basic overview of the layout and numbering of the NEC can be tremendously helpful in getting...