{"id":11473,"date":"2025-09-10T09:53:47","date_gmt":"2025-09-10T01:53:47","guid":{"rendered":"https:\/\/totcables.com\/?p=11473"},"modified":"2025-09-10T10:12:07","modified_gmt":"2025-09-10T02:12:07","slug":"cmp-cable-explained-why-plenum-rated-cable-is-required","status":"publish","type":"post","link":"https:\/\/totcables.com\/?p=11473","title":{"rendered":"CMP Cable Explained: Why Plenum-Rated Cable Is Required"},"content":{"rendered":"

{“main-title”:{“component”:”hc_title”,”id”:”main-title”,”title”:””,”subtitle”:”One of the most common NEC questions is: Is CMR cable plenum-rated? The answer is no. For plenum spaces, only CMP-rated cable is permitted.”,”title_content”:{“component”:”hc_title_image”,”id”:”title-image”,”image”:”https:\/\/totcables.com\/wp-content\/uploads\/2025\/09\/CMP-Cable.jpg|1000|1000|11474″,”full_screen”:false,”full_screen_height”:””,”parallax”:false,”bleed”:””,”ken_burn”:””,”overlay”:”transparent-dark”,”breadcrumbs”:true,”white”:true,”position”:””}},”section_5ZtkF”:{“component”:”hc_section”,”id”:”section_5ZtkF”,”section_width”:””,”animation”:””,”animation_time”:””,”timeline_animation”:””,”timeline_delay”:””,”timeline_order”:””,”vertical_row”:””,”box_middle”:””,”css_classes”:””,”custom_css_classes”:””,”custom_css_styles”:””,”section_content”:[{“component”:”hc_column”,”id”:”column_vtfQF”,”column_width”:”col-md-12″,”animation”:””,”animation_time”:””,”timeline_animation”:””,”timeline_delay”:””,”timeline_order”:””,”css_classes”:””,”custom_css_classes”:””,”custom_css_styles”:””,”main_content”:[{“component”:”hc_wp_editor”,”id”:”Xhugf”,”css_classes”:””,”custom_css_classes”:””,”custom_css_styles”:””,”editor_content”:”<\/p>\n

One of the most common NEC questions is: \u201cIs CMR cable plenum-rated?\u201d<\/strong> The answer is no<\/strong>. For plenum spaces, only CMP-rated cable<\/strong> is permitted.<\/p>\n

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CMP Cable

CMP Cable<\/p><\/div>\\n\\n<\/p>\n

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What Is a Plenum Space?<\/h3>\n

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A plenum<\/strong> is any area in a building where air circulates for heating, cooling, or ventilation\u2014such as drop ceilings, raised floors, or HVAC ducts<\/strong>. These spaces spread smoke and toxic gases quickly during a fire.<\/p>\n

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\u201cNot sure how CMP compares with CM and CMR? Start with our ultimate cable fire rating guide<\/a><\/strong>.\u201d<\/p>\n

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What Is CMP Cable?<\/h3>\n

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