I recently searched for the exact phrase looking for the latest Industrial Control Panels standard. Here’s what you need to know before clicking any links:
: Door interlocks are generally no longer required , meaning all doors don't have to be locked while power is present, nor does the main disconnect have to be open to access the panel. ul 508a 2022 pdf hot
Variable Frequency Drives (VFDs) are everywhere. The 2022 edition introduces specific new spacing and overcurrent protection rules for drives. Specifically, the allowance for "self-protected" drives has been redefined. If you are building a pump or fan panel, the heat is on to ensure your VFD branch circuit protection meets the new "Type E" or "Type F" definitions. I recently searched for the exact phrase looking
The changes are substantial, but manageable. The 2022 edition introduces specific new spacing and
: The standard now requires a Class A Ground Fault Circuit Interrupter (GFCI) for all general-purpose receptacle outlets, matching NFPA 79 and IEC 60204-1 requirements.