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  1. MSPNB

    UL 508A Industrial Control Panel with a non UL listed part.

    I'm doing an in-house UL review at our 508A panel shop on a panel that we built before it ships out. Everything checks out, all parts are UL listed but one. A potentiometer mounted on the cabinet door. Im wondering if we can use this part. Its wired up to a VFD and adjusts the speed of the...

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