The article discusses several changes to the 2017 edition of the National Electrical Code (NEC), covering traditional and alternative sources of electrical power. The changes include increased shock protection, product listing and suitability, arc flash awareness, short circuit current ratings, available...
The Institute of Civil Engineers (ICE) has published a set of amendments to its standard form New Engineering Contracts (NEC), making changes to the way compensation and defined cost are assessed.
To increase serviceability safety and increase clarity NEC 2017 addresses the location of the PV disconnect and introduces new PV system boundaries. Unlike previous NEC editions, NEC 2017 breaks out energy storage and battery-based multimode inverters from the PV system. As energy storage systems bec...
A new definition of the term “reconditioned” has been added in Part I of Article 100. The process of reconditioning equipment differs from normal servicing of equipment that remains in place. The term “reconditioned” and related general requirements were introduced in the 2017NECin ...
While this information about 2017 NEC code changes is helpful, it is always best to consult the most recent code book when making decisions on the jobsite. How do these changes affect your jobsite? Any surprises? Source: Schneider Electric’s National Elecreical Code© Changes Live Broadcast...
Articles about NEC 2017 changes, economics of HVAC systems, medical and hospital projects, professional salaries, and NFPA 110-2016 were Consulting-Specifying Engineer's five most clicked articles from last week, December 19-December 25. W...
The credit is refundable to the extent it exceeds your regular tax liability, which means that if it more than offsets your tax liability, you’ll get a refund check. But it does not offset the Alternative Minimum Tax. In addition, income limits were expanded from earlier versions of the ...
highly sensitive to climate change, this study introduces the concept of velocity to analyze the spatial pattern of frozen days (FDAY), onset date of soil freeze (FON), offset date of soil freeze (FOFF), and number of soil freeze/thaw cycles in spring (FTC) in NEC from 1979 to 2020....
The venerable “six-handle rule” for services, a part of the NEC for more than 80 years, has been substantially modified in the 2020 edition. Section 230.71, services, maximum number of disconnects, in the 2017 edition allowed up to six service disconnects installed in a single enclosure,...
reset was correct, only unneccesary reporting was caused. [Stefan Eissing] *) mod_proxy: Fix double encoding of the uri-path of the request forwarded to the origin server, when using mapping=encoded|servlet. [Yann Ylavic] *) mod_dav: Open the lock database read-only when possibl...