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IAEI Magazine January-February 2014


Features

Solar Photovoltaic Rooftop Safety and Structural Issues Addressed in new SPE-900 Guideline

by Muktha Tumkur and Victoria Alleyn

The popularity of solar photovoltaic rooftops has created a need for guidance on their installations, given many building codes in Canada do not address relevant photovoltaic safety and structural issues. A lack of guidance in this area can expose installers and first responders, such as firefighters, needing rooftop access to residential and non-residential buildings to unnecessary risks. The new CSA Group SPE-900, Solar Photovoltaic Rooftop-Installation Best Practices Guideline provides guidance and best practices for the design and installation of photovoltaic rooftop systems. Read more

Perspectives on PV

Load Side PV Connections

by John Wiles

Through the exceptional efforts of the members of NFPA NEC Code-Making Panel 4 working with the proposals and comments that were submitted for the 2014 Code, significant changes have been made to Section 705.12(D), Load Side Connections for Utility-interactive PV Inverters. These changes will allow better understanding of the requirements for load-side connections of utility interactive inverters and will clarify requirements that were not fully described in previous editions of the code. Read more

Hazardous Location — How do we know that it actually is?

by Ark Tsisserev

The experience of dealing with this subject demonstrates lots of inconsistencies among the designers, installers and regulators. And the issue relates not only to a proper selection of electrical equipment and wiring methods for connection of this equipment, but to the determination of hazard and to the ability of accurately assigning specific area of classification for a particular hazardous location.. Read more

Articles 312 and 314

by Randy Hunter

Our focus for this article will be 2011 NEC Articles 312 and 314. These two articles deal with similar subjects, so they have some conceptual overlaps. Article 312 deals with Cabinets, Cutout Boxes and Meter Socket Enclosures. Article 314 deals with Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures.. Read more

Now that industrial GFCIs are here, inspectors have a proactive option for shock protection

by Nehad El-Sherif, P. Eng.

UL Class A ground-fault circuit interrupters (GFCI) began to be required in kitchens, bathrooms and outdoor outlets in the early ’70s, and have saved many lives over the years: According to the Consumer Product Safety Commission, household electrocutions decreased from 270 in 1990 to 180 in 2001. But what about in the workplace? Class A GFCIs cannot be used where the electrical equipment runs on 480 or 600 V. Yet the danger of electrocution is real. From 2003 to 2009 there were 801 fatal workplace accidents caused by worker contact with electrical current (not including the construction industry). Read more

Financial Resolutions for the New Year

by Jesse Abercrombie

About 45% of Americans usually make New Year’s resolutions, according to a survey from the University of Scranton; but the same survey shows that only 8% of us actually keep our resolutions. Perhaps this low success rate is not such a tragedy when our resolutions involve things like losing a little weight or learning a foreign language. But when we make financial resolutions — resolutions that, if achieved, could significantly help us in our pursuit of our important long-term goals — it’s clearly worthwhile to make every effort to follow through. Read more

"The Look of IAEI"

by Mark Hilbert

I am truly honored to be representing our Association for the next year as the international president. I can only hope that I can do as much for our Association during my term as those who have come before me. However, the year ahead of us is not about an international president alone; it is about us as an association and what can we do for IAEI. This will be a challenging year as we are entering, I believe, into an era of significant realignment and restructuring which will stretch well beyond my time as president. Read more

Vending Machines

by Joseph Wages, Jr.

Many people die each year from vending machines that accidentally fall over. This usually occurs when a product is not dispensed properly, and the machine is "shaken” to dislodge the product. You have a better chance of being electrocuted by a vending machine than winning the lottery. Your odds at winning the lottery vary but can be 1 in 175 million. The odds of being killed by a vending machine are 1 in 112 million. Read more

Vertical MC Cable Support in the 2014 NEC

by Phil Simmons

The 2014 NEC has added language that affects only metal-clad (MC) cables with phase conductors 250 kcmil or larger. You may think of MC cable as primarily a branch circuit wiring method, but larger size MC cables are often used for feeder circuits in high-rise buildings or other large installations. Many of the support and securement requirements are the same regardless of the size of the cable; however, there are different securing requirements for MC cable with very small or very large conductors. Read more

Marking Available Fault Current

by Thomas A. Domitrovich

When standing in front of a line-up of switchgear, panelboards or switchboards you may be amazed at how many labels you see. These labels are there for a reason and can be very helpful if you just take the time to understand them. Today we’re going to talk about NEC Section 110.24, "Available Fault Current,” and a few other associated sections to understand this requirement and the various ways it impacts safety. Read more

Does the CE Code allow an outdoor dielectric liquid-filled transformer 1m of a door or window of a building?

by Steve Douglas

The general requirements in the Canadian Electrical Code Part I (CE Code) covering clearance of outdoor oil-filled transformers to a building or openings are not new; in fact, the first edition of the CE Code, dated 1927, had the following requirement. Read more

Departments

Editorial

A New Beginning... and Things Will Change

by David Clements

"This is a new year. A new beginning. And things will change.” Does this quote from Taylor Swift pertain to IAEI? Absolutely! Before I talk about what is new in 2014, let me reflect on our 2013 IAEI Section Meetings. From August 23 to October 9, 2013, I had the privilege of attending all six IAEI meetings. My fourth time attending all six meetings, which started back in 2007 when I was president and for the past three years as your CEO/Executive Director. Read more

UL Question Corner

UL’s New Enhanced Certification Mark

by Underwriters Laboratories

I have seen that UL has developed a new certification mark. Can you tell me more about it? Are the current Listing and Classification marks still good? Read more

Minutes

IAEI Activities | Minutes

Download the Chapter and Division minutes from the IAEI January-February 2014 issue. Read more


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