{"product_id":"square-d-fy14070b","title":"Square D FY14070B 70A 1-Pole 277 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D FY14070B 70A 1-Pole 277 V Circuit Breaker—a purpose-built protective device designed for reliable overcurrent protection on commercial electrical systems. This single-pole breaker guards a single hot leg on 277-volt circuits, delivering fast fault interruption when it matters most and helping to keep your critical loads shielded from damage.\u003c\/p\u003e \u003ch2\u003eKey specifications that matter\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 70 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 277 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e FY14070B\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this 1-Pole 277 V breaker stands out\u003c\/h3\u003e\n\u003cp\u003eDesigned for single-circuit protection, the FY14070B focuses its interrupting capability on one hot conductor in 277 V systems—ideal for commercial lighting and equipment runs that require a dedicated, reliable safeguard. The 70 A rating strikes a practical balance for medium-to-high current loads, enabling you to protect wiring, connectors, and downstream devices without unnecessary trips on everyday operation.\u003c\/p\u003e \u003ch3\u003eTypical use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e277 V lighting circuits in offices, retail spaces, schools, and similar commercial environments\u003c\/li\u003e \u003cli\u003eDedicated feeders for equipment and machines operating on 277 V\u003c\/li\u003e \u003cli\u003eReplacement in panels that specifically accommodate FY-series breakers for a matched fit and performance\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and installation considerations\u003c\/h3\u003e\n\u003cp\u003eEnsure compatibility by using the FY14070B in Square D panelboards or enclosures that accept FY-series breakers. Always verify your panel labeling to confirm 1-pole, 277 V devices and the specific part number before installation. Proper sizing and secure mounting help ensure dependable reset behavior and consistent protection across the circuit.\u003c\/p\u003e \u003ch3\u003ePractical tips for maintenance and reliability\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eKeep a small inventory of FY14070B spares on hand for planned maintenance or emergency replacements.\u003c\/li\u003e \u003cli\u003eLabel the protected circuit clearly to simplify future servicing or troubleshooting.\u003c\/li\u003e \u003cli\u003eIf a trip occurs, inspect the associated wiring and downstream loads for faults or overloads that could trigger repeated protection events.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhen you need precise, dependable protection for a single 277 V circuit, the Square D FY14070B 70A 1-Pole 277 V Circuit Breaker delivers targeted reliability, straightforward installation, and a trusted name in electrical protection. Add it to your cart to ensure you’re prepared for maintenance, upgrades, or ongoing system resilience.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423251222690,"sku":"FY14070B","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/square-d-fy14070b","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}