Case Study: A Fragile Environment in a Rugged Climate
by Todd Wimmer
Without state-of-the-art HVAC technology, it is doubtful the unique RainForest at the Cleveland Metroparks Zoo complex could exist; and it continues to benefit from equipment improvements, such as advanced motor and drive design.
The Texas Margin Tax: There’s a New Tariff in Town
by Jay D. Crutcher, Esq.
As a business owner, you need to know exactly how the margin tax affects your business so that you can take proactive measures to minimize your tax liability. Otherwise, you could face a surprising tax bill or overlook tax planning opportunities.
When Disconnects Are Not Enough
by Michael J. Johnston
Electrical safety and worker safety require both individual and organizational efforts to be effective and beneficial. The NEC location requirements for disconnecting means, and specific provisions for disconnects that are capable of being locked out (off) when not located in sight from equipment provide an installed means for workers to ensure safety by adding their lock to equipment and circuit disconnects.
Perspectives on PV: Disconnect, Disconnect, Where For Art Thou? 
by John Wiles
To disconnect or not to disconnect…that is not the question. Disconnects are required throughout the PV system with the proper ratings and in the code-required places.
Connecting with Aluminum
by Jacqueline Silvia and Richard Brooks
Copper may be an omnipresent element, but it is far from the only choice for electrical connectors — a good thing considering its escalating cost in recent years. Aluminum is actually a better fit for some customers who have more industrial or commercial applications.
Lobbyists Undermine Public Safety with Exemption Move (pdf)
by Jim Long
Commissioner Jim Long of the North Carolina Department of Insurance made some very relevant points in his letter regarding moves by some influential groups to lessen electrical safety, which is reprinted here. These groups are attempting to exempt industrial machinery from Code requirements for electrical equipment to be listed and labeled by an independent third party testing laboratory.
Overcurrent Protection Basics — Part II
by Tim Crnko
Too often, installations are often not safe due to improper selection, application, or maintenance of overcurrent protective devices. This article covers three overcurrent protective device ratings: ampere rating, voltage rating, and interrupting rating.
Utility Deregulation, What Does it Mean to Inspectors?
by Len Frier
Electrical degregulation has put certain new elements of an electrical system under the AHJ.
Being Aware of Hazards during Electrical System Inspections
by Joseph Weigel
Statistics indicate that five to ten arc-flash accidents that involve a fatality or serious injury to an employee occur every day in the United States.
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