{"product_id":"square-d-h366nr-heavy-duty-safety-switch-600a-3-pole-600v-fusible-disconnect-neutral-included-nema-3r-outdoor-enclosure","title":"Square D H366NR Heavy Duty Safety Switch – 600A – 3 Pole – 600V – Fusible Disconnect – Neutral Included – NEMA 3R Outdoor Enclosure","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a2f8ed0-8f20-83ee-90ff-e9af7afa5f6d-1\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a2f8ed0-8f20-83ee-90ff-e9af7afa5f6d-1\" data-turn-id-container=\"request-6a2f8ed0-8f20-83ee-90ff-e9af7afa5f6d-1\" data-testid=\"conversation-turn-14\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"bf759b76-d9ae-4f31-b3af-037607824d40\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003cp data-start=\"158\" data-end=\"675\"\u003eThe Square D H366NR Heavy Duty Safety Switch is a high-capacity fusible disconnect switch designed for critical commercial, industrial, and service entrance applications where reliable power isolation and system protection are essential. Manufactured by Schneider Electric under the Square D brand, this heavy-duty safety switch features a 600A current rating and a maximum voltage rating of 600V, making it suitable for large electrical distribution systems and heavy-duty equipment installations.\u003c\/p\u003e\n\u003cp data-start=\"677\" data-end=\"1038\"\u003eConfigured as a 3-pole switch with a factory-installed neutral, the H366NR provides a dependable means of disconnecting power in three-phase systems requiring a neutral conductor. When used with the appropriate fuses, the switch delivers effective overcurrent and short-circuit protection while providing safe isolation for maintenance and servicing operations.\u003c\/p\u003e\n\u003cp data-start=\"1040\" data-end=\"1377\"\u003eThe switch is equipped with a quick-make, quick-break operating mechanism that ensures positive contact action and reliable performance under demanding operating conditions. Its heavy-duty construction is engineered for long service life and continuous operation in industrial environments where performance and reliability are critical.\u003c\/p\u003e\n\u003cp data-start=\"1379\" data-end=\"1680\"\u003eHoused in a NEMA 3R galvannealed steel enclosure, the H366NR is designed for both indoor and outdoor applications. The rainproof, sleet-resistant enclosure protects internal components from weather exposure, making it ideal for service entrances, utility systems, and outdoor electrical installations.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1yl5694\" data-start=\"1687\" data-end=\"1705\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul data-start=\"1707\" data-end=\"2324\"\u003e\n\u003cli data-section-id=\"yuqlrx\" data-start=\"1707\" data-end=\"1752\"\u003e\n\u003cstrong data-start=\"1709\" data-end=\"1719\"\u003eBrand:\u003c\/strong\u003e Square D by Schneider Electric\u003c\/li\u003e\n\u003cli data-section-id=\"dn3u0f\" data-start=\"1753\" data-end=\"1793\"\u003e\n\u003cstrong data-start=\"1755\" data-end=\"1772\"\u003eManufacturer:\u003c\/strong\u003e Schneider Electric\u003c\/li\u003e\n\u003cli data-section-id=\"1q5mzlt\" data-start=\"1794\" data-end=\"1821\"\u003e\n\u003cstrong data-start=\"1796\" data-end=\"1812\"\u003ePart Number:\u003c\/strong\u003e H366NR\u003c\/li\u003e\n\u003cli data-section-id=\"1pt54tw\" data-start=\"1822\" data-end=\"1847\"\u003e\n\u003cstrong data-start=\"1824\" data-end=\"1832\"\u003eUPC:\u003c\/strong\u003e 785901195825\u003c\/li\u003e\n\u003cli data-section-id=\"znkv52\" data-start=\"1848\" data-end=\"1876\"\u003e\n\u003cstrong data-start=\"1850\" data-end=\"1859\"\u003eGTIN:\u003c\/strong\u003e 00785901195825\u003c\/li\u003e\n\u003cli data-section-id=\"1lof122\" data-start=\"1877\" data-end=\"1901\"\u003e\n\u003cstrong data-start=\"1879\" data-end=\"1890\"\u003eSeries:\u003c\/strong\u003e H Series\u003c\/li\u003e\n\u003cli data-section-id=\"e6v92b\" data-start=\"1902\" data-end=\"1947\"\u003e\n\u003cstrong data-start=\"1904\" data-end=\"1920\"\u003eDevice Type:\u003c\/strong\u003e Heavy Duty Safety Switch\u003c\/li\u003e\n\u003cli data-section-id=\"1de219k\" data-start=\"1948\" data-end=\"1980\"\u003e\n\u003cstrong data-start=\"1950\" data-end=\"1970\"\u003eDisconnect Type:\u003c\/strong\u003e Fusible\u003c\/li\u003e\n\u003cli data-section-id=\"123ea7m\" data-start=\"1981\" data-end=\"2016\"\u003e\n\u003cstrong data-start=\"1983\" data-end=\"2001\"\u003eSwitch Action:\u003c\/strong\u003e Single Throw\u003c\/li\u003e\n\u003cli data-section-id=\"rta89k\" data-start=\"2017\" data-end=\"2048\"\u003e\n\u003cstrong data-start=\"2019\" data-end=\"2039\"\u003eNumber of Poles:\u003c\/strong\u003e 3 Pole\u003c\/li\u003e\n\u003cli data-section-id=\"fxt1ty\" data-start=\"2049\" data-end=\"2091\"\u003e\n\u003cstrong data-start=\"2051\" data-end=\"2063\"\u003eNeutral:\u003c\/strong\u003e Factory Installed Neutral\u003c\/li\u003e\n\u003cli data-section-id=\"72t1fv\" data-start=\"2092\" data-end=\"2120\"\u003e\n\u003cstrong data-start=\"2094\" data-end=\"2113\"\u003eCurrent Rating:\u003c\/strong\u003e 600A\u003c\/li\u003e\n\u003cli data-section-id=\"1nulhx1\" data-start=\"2121\" data-end=\"2163\"\u003e\n\u003cstrong data-start=\"2123\" data-end=\"2150\"\u003eMaximum Voltage Rating:\u003c\/strong\u003e 600V AC\/DC\u003c\/li\u003e\n\u003cli data-section-id=\"w52win\" data-start=\"2164\" data-end=\"2200\"\u003e\n\u003cstrong data-start=\"2166\" data-end=\"2184\"\u003eMounting Type:\u003c\/strong\u003e Surface Mount\u003c\/li\u003e\n\u003cli data-section-id=\"1ogd7r7\" data-start=\"2201\" data-end=\"2228\"\u003e\n\u003cstrong data-start=\"2203\" data-end=\"2221\"\u003eTerminal Type:\u003c\/strong\u003e Lugs\u003c\/li\u003e\n\u003cli data-section-id=\"15duaa5\" data-start=\"2229\" data-end=\"2292\"\u003e\n\u003cstrong data-start=\"2231\" data-end=\"2251\"\u003eWire Size Range:\u003c\/strong\u003e #3\/0 to 500 kcmil (Copper or Aluminum)\u003c\/li\u003e\n\u003cli data-section-id=\"ywr4nq\" data-start=\"2293\" data-end=\"2324\"\u003e\n\u003cstrong data-start=\"2295\" data-end=\"2311\"\u003eDuty Rating:\u003c\/strong\u003e Heavy Duty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1g5d8j4\" data-start=\"2331\" data-end=\"2357\"\u003eElectrical Performance\u003c\/h3\u003e\n\u003cul data-start=\"2359\" data-end=\"2754\"\u003e\n\u003cli data-section-id=\"1g9l4qy\" data-start=\"2359\" data-end=\"2386\"\u003e\n\u003cstrong data-start=\"2361\" data-end=\"2379\"\u003eRated Current:\u003c\/strong\u003e 600A\u003c\/li\u003e\n\u003cli data-section-id=\"1lpt376\" data-start=\"2387\" data-end=\"2422\"\u003e\n\u003cstrong data-start=\"2389\" data-end=\"2409\"\u003eMaximum Voltage:\u003c\/strong\u003e 600V AC\/DC\u003c\/li\u003e\n\u003cli data-section-id=\"1xghqbq\" data-start=\"2423\" data-end=\"2538\"\u003e\n\u003cstrong data-start=\"2425\" data-end=\"2465\"\u003eShort-Circuit Current Rating (SCCR):\u003c\/strong\u003e\n\u003cul data-start=\"2468\" data-end=\"2538\"\u003e\n\u003cli data-section-id=\"grmbpj\" data-start=\"2468\" data-end=\"2498\"\u003e10kA with Class H or K fuses\u003c\/li\u003e\n\u003cli data-section-id=\"xet3g1\" data-start=\"2501\" data-end=\"2538\"\u003eUp to 200kA with Class J or R fuses\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"m4k7bt\" data-start=\"2539\" data-end=\"2650\"\u003e\n\u003cstrong data-start=\"2541\" data-end=\"2561\"\u003eFuse Protection:\u003c\/strong\u003e Provides overcurrent and short-circuit protection when equipped with appropriate fuses\u003c\/li\u003e\n\u003cli data-section-id=\"1rjlpro\" data-start=\"2651\" data-end=\"2698\"\u003e\n\u003cstrong data-start=\"2653\" data-end=\"2692\"\u003eQuick-Make \/ Quick-Break Mechanism:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli data-section-id=\"1ogwd7r\" data-start=\"2699\" data-end=\"2754\"\u003e\n\u003cstrong data-start=\"2701\" data-end=\"2748\"\u003eSuitable for Service Entrance Applications:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1qpthm9\" data-start=\"2761\" data-end=\"2799\"\u003eMechanical \u0026amp; Construction Features\u003c\/h3\u003e\n\u003cul data-start=\"2801\" data-end=\"3156\"\u003e\n\u003cli data-section-id=\"1b3ffo8\" data-start=\"2801\" data-end=\"2845\"\u003eHeavy-duty industrial-grade construction\u003c\/li\u003e\n\u003cli data-section-id=\"l8htcq\" data-start=\"2846\" data-end=\"2884\"\u003eFactory-installed neutral assembly\u003c\/li\u003e\n\u003cli data-section-id=\"5piolc\" data-start=\"2885\" data-end=\"2921\"\u003eSingle-throw switching mechanism\u003c\/li\u003e\n\u003cli data-section-id=\"2tir8g\" data-start=\"2922\" data-end=\"2954\"\u003eSurface-mounted installation\u003c\/li\u003e\n\u003cli data-section-id=\"hr7164\" data-start=\"2955\" data-end=\"2992\"\u003eQuick-make, quick-break operation\u003c\/li\u003e\n\u003cli data-section-id=\"8mma56\" data-start=\"2993\" data-end=\"3028\"\u003eVisible blade disconnect design\u003c\/li\u003e\n\u003cli data-section-id=\"19f97br\" data-start=\"3029\" data-end=\"3057\"\u003eLug terminal connections\u003c\/li\u003e\n\u003cli data-section-id=\"73p0mq\" data-start=\"3058\" data-end=\"3090\"\u003eLong mechanical service life\u003c\/li\u003e\n\u003cli data-section-id=\"15h5hha\" data-start=\"3091\" data-end=\"3156\"\u003eDesigned for demanding commercial and industrial applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1k5v4yh\" data-start=\"3163\" data-end=\"3189\"\u003eEnclosure \u0026amp; Protection\u003c\/h3\u003e\n\u003cul data-start=\"3191\" data-end=\"3418\"\u003e\n\u003cli data-section-id=\"1ib4knd\" data-start=\"3191\" data-end=\"3224\"\u003e\n\u003cstrong data-start=\"3193\" data-end=\"3214\"\u003eEnclosure Rating:\u003c\/strong\u003e NEMA 3R\u003c\/li\u003e\n\u003cli data-section-id=\"nvrubg\" data-start=\"3225\" data-end=\"3271\"\u003e\n\u003cstrong data-start=\"3227\" data-end=\"3250\"\u003eEnclosure Material:\u003c\/strong\u003e Galvannealed Steel\u003c\/li\u003e\n\u003cli data-section-id=\"atwtcg\" data-start=\"3272\" data-end=\"3307\"\u003e\n\u003cstrong data-start=\"3274\" data-end=\"3301\"\u003eRainproof Construction:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli data-section-id=\"1ps3p1f\" data-start=\"3308\" data-end=\"3344\"\u003e\n\u003cstrong data-start=\"3310\" data-end=\"3338\"\u003eSleet and Ice Resistant:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli data-section-id=\"1492st9\" data-start=\"3345\" data-end=\"3378\"\u003e\n\u003cstrong data-start=\"3347\" data-end=\"3372\"\u003eIndoor\/Outdoor Rated:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli data-section-id=\"1bv1y3u\" data-start=\"3379\" data-end=\"3418\"\u003e\n\u003cstrong data-start=\"3381\" data-end=\"3412\"\u003eCorrosion-Resistant Finish:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"wggvqn\" data-start=\"3425\" data-end=\"3441\"\u003eApplications\u003c\/h3\u003e\n\u003cul data-start=\"3443\" data-end=\"3760\"\u003e\n\u003cli data-section-id=\"6f6pcy\" data-start=\"3443\" data-end=\"3475\"\u003eService entrance disconnects\u003c\/li\u003e\n\u003cli data-section-id=\"n7lx3w\" data-start=\"3476\" data-end=\"3517\"\u003eIndustrial power distribution systems\u003c\/li\u003e\n\u003cli data-section-id=\"14uedct\" data-start=\"3518\" data-end=\"3558\"\u003eCommercial electrical infrastructure\u003c\/li\u003e\n\u003cli data-section-id=\"ht42qz\" data-start=\"3559\" data-end=\"3587\"\u003eManufacturing facilities\u003c\/li\u003e\n\u003cli data-section-id=\"aty17m\" data-start=\"3588\" data-end=\"3627\"\u003eUtility and infrastructure projects\u003c\/li\u003e\n\u003cli data-section-id=\"1godz41\" data-start=\"3628\" data-end=\"3669\"\u003eMotor control and equipment isolation\u003c\/li\u003e\n\u003cli data-section-id=\"9tpkup\" data-start=\"3670\" data-end=\"3706\"\u003eOutdoor electrical installations\u003c\/li\u003e\n\u003cli data-section-id=\"1a1qlh3\" data-start=\"3707\" data-end=\"3760\"\u003eThree-phase systems requiring a neutral conductor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"p3m70j\" data-start=\"3767\" data-end=\"3797\"\u003eStandards \u0026amp; Certifications\u003c\/h3\u003e\n\u003cul data-start=\"3799\" data-end=\"4011\"\u003e\n\u003cli data-section-id=\"1w9xzw2\" data-start=\"3799\" data-end=\"3812\"\u003eUL Listed\u003c\/li\u003e\n\u003cli data-section-id=\"p6c3jj\" data-start=\"3813\" data-end=\"3874\"\u003eDesigned to meet applicable UL safety switch requirements\u003c\/li\u003e\n\u003cli data-section-id=\"1y61nyr\" data-start=\"3875\" data-end=\"3942\"\u003eSuitable for commercial and industrial electrical installations\u003c\/li\u003e\n\u003cli data-section-id=\"5a07lo\" data-start=\"3943\" data-end=\"4011\"\u003eHeavy-duty safety switch construction for demanding applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"rwm0ne\" data-start=\"4018\" data-end=\"4043\"\u003eEnvironmental Ratings\u003c\/h3\u003e\n\u003cul data-start=\"4045\" data-end=\"4328\"\u003e\n\u003cli data-section-id=\"1oiq7j\" data-start=\"4045\" data-end=\"4094\"\u003eSuitable for indoor and outdoor installations\u003c\/li\u003e\n\u003cli data-section-id=\"srtsqs\" data-start=\"4095\" data-end=\"4126\"\u003eRainproof NEMA 3R enclosure\u003c\/li\u003e\n\u003cli data-section-id=\"1jnlrpa\" data-start=\"4127\" data-end=\"4166\"\u003eResistant to sleet and ice exposure\u003c\/li\u003e\n\u003cli data-section-id=\"1n3mo1v\" data-start=\"4167\" data-end=\"4210\"\u003eDurable galvannealed steel construction\u003c\/li\u003e\n\u003cli data-section-id=\"i7skae\" data-start=\"4211\" data-end=\"4272\"\u003eDesigned for harsh industrial and commercial environments\u003c\/li\u003e\n\u003cli data-section-id=\"130avg3\" data-start=\"4273\" data-end=\"4328\"\u003eLong-term reliability in outdoor service conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"8imf0z\" data-start=\"4335\" data-end=\"4361\"\u003eAdditional Information\u003c\/h3\u003e\n\u003cul data-start=\"4363\" data-end=\"4709\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"1hw6nne\" data-start=\"4363\" data-end=\"4390\"\u003e\n\u003cstrong data-start=\"4365\" data-end=\"4380\"\u003eFusibility:\u003c\/strong\u003e Fusible\u003c\/li\u003e\n\u003cli data-section-id=\"k322cr\" data-start=\"4391\" data-end=\"4440\"\u003e\n\u003cstrong data-start=\"4393\" data-end=\"4404\"\u003eSeries:\u003c\/strong\u003e H Series Heavy Duty Safety Switch\u003c\/li\u003e\n\u003cli data-section-id=\"arjz2x\" data-start=\"4441\" data-end=\"4475\"\u003e\n\u003cstrong data-start=\"4443\" data-end=\"4468\"\u003eElectrical Interlock:\u003c\/strong\u003e None\u003c\/li\u003e\n\u003cli data-section-id=\"1wtc2b4\" data-start=\"4476\" data-end=\"4513\"\u003e\n\u003cstrong data-start=\"4478\" data-end=\"4497\"\u003eMounting Style:\u003c\/strong\u003e Surface Mount\u003c\/li\u003e\n\u003cli data-section-id=\"1x6yubn\" data-start=\"4514\" data-end=\"4709\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"4516\" data-end=\"4532\"\u003eApplication:\u003c\/strong\u003e High-capacity power isolation and overcurrent protection for industrial and commercial systems requiring reliable disconnecting means and a factory-installed neutral conductor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"NEW","offer_id":48533269807353,"sku":"H366NR","price":6878.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/7810\/7385\/files\/h366_1_7b75e292-ebf8-4615-8542-ac2631c3bcc9.webp?v=1781595293","url":"https:\/\/mycircuitbreakers.com\/products\/square-d-h366nr-heavy-duty-safety-switch-600a-3-pole-600v-fusible-disconnect-neutral-included-nema-3r-outdoor-enclosure","provider":"My Circuit Breakers","version":"1.0","type":"link"}