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The WESFPNFB – WESTINGHOUSE PANEL FILLER is designed to efficiently fill unused spaces in your electrical panel, ensuring optimal performance and safety. Made from durable materials, this panel filler offers a reliable solution for maintaining panel integrity. Perfect for both renovations and new installations, it seamlessly enhances your circuit board’s functionality.
They are both a safety and code requirement. The Canadian Electrical Code (CEC) requires that all unused openings in an electrical panel enclosure be closed off. Open slots expose live bus bars, creating a risk of accidental contact, electric shock, and arc flash — so fillers like the WESFPNFB are a necessary safety item, not merely cosmetic.
Yes — Northern Breaker Group specializes in obsolete and hard-to-find Westinghouse electrical components, and the WESFPNFB is stocked to support exactly these legacy installations. Slot sizing can differ between older Westinghouse series and later Challenger-branded panels, so we recommend confirming your panel model with us before ordering to ensure a proper fit.
We strongly advise against it. Westinghouse and Challenger panels have specific slot dimensions and retention clip designs — a generic filler may not seat securely, leaving gaps that fail a CEC inspection. Using the correct OEM-specified filler like the WESFPNFB ensures a flush, secure fit and keeps your panel inspection-ready. Contact us and we'll make sure you get the right part.
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