New NEMA Standard on Electrical Boxes Released

04/20/2017 |

Besides external walls and ceilings in a building, uninsulated interior walls and floor-ceiling cavities not designed specifically for air exchange, present pathways for air leakage

The National Electrical Manufacturers Association (NEMA) published NEMA OS 4-2016 Requirements for Air-Sealed Boxes for Electrical and Communication Applications, a new standard that establishes a performance test and classification scheme for electrical outlet boxes, wall boxes, ceiling boxes and floor boxes.

The standard is designed to reduce air leaks through the boxes and their installed interface with the building structure when installed as intended for normal use.

Besides external walls and ceilings in a building, uninsulated interior walls and interior floor-ceiling cavities not designed specifically for air exchange, present pathways for air leakage. Even though air barriers are not commonly installed here, consideration should be given to using effective sealing techniques at wall, ceiling, and floor penetrations in these areas.

The classification scheme in this standard meets the intent of the International Energy Conservation Code (IECC) and covers boxes installed in walls, ceilings, and floors where an air barrier is required. To see the standard in full, please click here.

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See how professionals like you are taking advantage of the highest performing precision cooling system for their computer rooms and data centers, and why Data Aire is fast-becoming the number one choice for facility managers and building owners looking to decrease their energy consumption. 

Data Aire understands how digital technology and data gravity is rapidly impacting and transforming businesses. That’s why they developed ultra-efficient cooling technology to support the most modern (and not-so-modern) data centers.  Learn how One Wilshire in Los Angeles, one of the most advanced carrier hotels today, is surpassing California's strict energy efficiency requirements with Data Aire’s purpose-built system, which provide full-economization for 260 days – almost 72% of the year. That’s a measurable savings! Furthermore, the projected PUE on an annual basis for a full load is at or below 1.2.


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