{"product_id":"square-d-100-amp-40-circuit-20-space-indoor-main-breaker-box-panel-load-center","title":"Square D 100 Amp 40 Circuit 20 Space Indoor Main Breaker Box Panel Load Center","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D 100 Amp 40 Circuit 20 Space Indoor Main Breaker Box Panel Load Center is engineered to power demanding electrical distribution across industrial, commercial, and high-demand residential environments. Built by Square D, this panel delivers reliable serviceability for upgrades, retrofits, and maintenance replacements where dependable performance matters most.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e100 Amp main breaker\u003c\/strong\u003e provides clear, centralized protection for the feeder circuit and downstream branch circuits, helping you manage service integrity in mid-size installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e40 circuit capacity across 20 spaces\u003c\/strong\u003e offers abundant distribution capacity in a compact footprint, enabling thoughtful organization of branch circuits and room for future expansion.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndoor enclosure\u003c\/strong\u003e designed for indoor installations in utility rooms, basements, garages, or mechanical spaces where rugged, space-efficient distribution is needed.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable, trusted build\u003c\/strong\u003e from Square D, combining a robust panel frame with proven electrical performance to support service work, panel upgrades, retrofit projects, and ongoing maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for professionals\u003c\/strong\u003e ideal for electricians, panel builders, and MRO teams who require a reliable, stock-ready load center for field service, small projects, or sparing inventory.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eKey use cases include panel upgrades in aging facilities, retrofit projects to meet current codes, and service replacements where a dependable main breaker box is essential. Its 100 A rating and 40\/20 configuration make it a practical solution for consolidating circuits and organizing loads—from lighting and receptacles to HVAC controls and mechanical equipment.\u003c\/p\u003e \u003cp\u003eWho this is for: professional electricians, commercial and light-industrial installers, and facilities teams that need a dependable, scalable indoor load center with ample circuit capacity and readily available field components. If you’re stocking spares for service fleets or planning a retrofit, this panel offers a proven, future-ready foundation for reliable distribution.\u003c\/p\u003e \u003cp\u003ePractical tips for selection and installation:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eConfirm your service entrance needs and plan circuits with future growth in mind, using all 20 spaces as needed.\u003c\/li\u003e \u003cli\u003eCoordinate with local codes and labeling requirements to ensure compliant, organized panel boards and clear circuit identification.\u003c\/li\u003e \u003cli\u003ePair this panel with appropriate circuit breakers suited to your installation to optimize fault protection and load distribution.\u003c\/li\u003e \u003cli\u003eKeep a spare or two on hand for quick maintenance replacements and faster service calls.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46395780595874,"sku":null,"price":494.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_bd526ec2-f109-446f-b7aa-0f8874a7d73a.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/square-d-100-amp-40-circuit-20-space-indoor-main-breaker-box-panel-load-center","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}