{"product_id":"westinghouse-nb3900pr-circuit-breaker","title":"Westinghouse | NB3900PR | Circuit Breaker | 3-Pole","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Westinghouse NB3900PR Circuit Breaker, a purposeful 3-Pole solution built for reliability in maintenance, retrofit, and replacement projects. Designed to protect three‑phase circuits with consistent performance, this genuine part helps ensure your electrical system stays safe and compliant while you upgrade or restore service.\u003c\/p\u003e \u003ch3\u003eWhy the NB3900PR stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e3-Pole configuration:\u003c\/strong\u003e Specifically sized for three‑phase panels, delivering coordinated protection across all conductors.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGenuine Westinghouse part:\u003c\/strong\u003e NB3900PR is the recognized reference for compatibility within Westinghouse ecosystems and panels designed for this form factor.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBest compatibility reference:\u003c\/strong\u003e The part number NB3900PR is the most reliable guide when matching this breaker to your existing panel or load center.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTargeted for real-world needs:\u003c\/strong\u003e Ideal for ongoing maintenance, panel retrofits, or orderly replacements where exact specs matter.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat problems does it solve?\u003c\/h3\u003e\n\u003cp\u003eWhen you’re updating an electrical setup or restoring service after a fault, the NB3900PR provides a dependable, readily identifiable replacement option. By choosing a genuine Westinghouse part and matching it to the NB3900PR reference, you minimize the guesswork, reduce downtime, and preserve the integrity of your protection scheme across all three poles.\u003c\/p\u003e \u003ch3\u003eWho should consider this breaker?\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eElectrical professionals handling maintenance, retrofits, or replacements in three‑phase systems.\u003c\/li\u003e \u003cli\u003eFacility managers updating older panels that require a precise NB3900PR-compatible component.\u003c\/li\u003e \u003cli\u003eInstallers who value a straightforward procurement process using a clearly defined part number for compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow to ensure a proper fit\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, verify:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eThe panel or load center requires a 3‑pole breaker with the NB3900PR form factor.\u003c\/li\u003e \u003cli\u003eThe panel’s labeling or documentation references NB3900PR or an equivalent Westinghouse 3‑pole unit.\u003c\/li\u003e \u003cli\u003eRatings and voltage align with your system requirements and the panel’s specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Confirm fit and ratings before ordering. Part number NB3900PR is the best reference for compatibility.\u003c\/p\u003e \u003ch3\u003ePractical tips for installation and use\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePower down the equipment and follow lockout\/tagout procedures before replacing a breaker.\u003c\/li\u003e \u003cli\u003eInspect the opposing breaker slots and mounting hardware for clean engagement to ensure solid electrical contact.\u003c\/li\u003e \u003cli\u003eMaintain documentation of the replacement part number (NB3900PR) for future maintenance cycles and panel audits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Westinghouse NB3900PR 3‑Pole Circuit Breaker, you gain a precise, trustworthy component tailored for three‑phase protection. It’s the sensible choice for professionals who demand accurate compatibility, straightforward procurement, and dependable performance in every retrofit, maintenance, or replacement project.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Westinghouse","offers":[{"title":"Default Title","offer_id":46427171356834,"sku":"NB3900PR","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a0994f42-7fad-49d1-911a-c2784022b8c9.png?v=1765492979","url":"https:\/\/www.ampstate.com\/products\/westinghouse-nb3900pr-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}