There is often confusion with the grounding and bonding requirements of the National Electrical Code®(NEC)® when concentric or eccentric knockouts are encountered. This article will help guide you through these important considerations. Overview Concentric or eccentric knockouts that are part of a cabinet, cutout box, junction box, or pull box, installed on an electrical system… read more
Overview The use of 3D printers in industries from manufacturing and healthcare, to construction and education, is exploding. A game-changing technology for many industries, 3D printers offer companies an opportunity to quickly visualize, develop and produce custom products of all kinds on demand. However, with dozens of filament types and a process that may, if… read more
Section 1403.2 of the International Building Code (IBC) requires exterior walls of a building to be provided with a weather-resistant exterior wall envelope. UL performance testing helps designers and code authorities achieve code compliance. The exterior wall envelope is a system or assembly of exterior wall components, including exterior wall finish materials, that provides protection… read more
Ten things to know about these Listed products. Fire code officials and contractors who are involved with designing, installing and approving installations that contain aboveground flammable liquid tanks are used to seeing shop fabricated tanks that bear a UL Listing (Certification) Mark. However, they may not fully understand what the certification covers, or some key… read more
A cool idea for saving energy Energy conservation and green construction codes and regulations include requirements for buildings to be designed to use energy effectively to save natural resources. One method for doing this involves the use of solar reflectance roofing materials, sometimes referred to as “cool roofs.” A cool roof works by both absorbing… read more
Carbon monoxide (CO) alarms play an important role in protecting the public against carbon monoxide poisoning. Having a basic understanding of CO poisoning, CO alarms, how they are Listed, and how they are to be installed and maintained is an important consideration for code authorities, especially those in jurisdictions where installation of CO alarms is… read more
LED retrofit kits for signs and luminaires When Listed products are modified in the field, it is not possible for UL to confirm that the product continues to meet applicable certification safety requirements unless the field modifications are investigated by UL. However, an effective alternative to a UL field evaluation is the use of retrofit… read more
The 2018 edition of the International Fire Code (IFC) has a new Section 1205 covering stationary fuel cell power systems. This requires prepackaged fuel cell power systems to be listed and labeled in accordance with the Canadian Standards Association’s CSA FC 1 and modules and components in a pre-engineered fuel cell power system to be… read more
UL ARCHITECTURAL SERVICES UL Architectural Services are intended to address situations pertaining to design solutions by providing links to be able to easily locate UL resources using online tools such as UL Product iQTM. LOCATING DESIGN SOLUTIONS Architectural Services are used not only by architects but can be used by anyone, including engineers and contractors,… read more
(Originally posted in 2015, Issue 2, The Code Authority newsletter. Content may not reflect changes that have occurred since its original publication.) An option for providing power when it’s needed In today’s energy conscious society there is a growing demand for energy sources to provide a constant source of reliable electric power, whether it is… read more