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September-October 2013
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September-October 2013 CoverSeptember-October 2013

TABLE OF CONTENTS

 

 

 

 

 

 

 

Features

A Journey Back to Basics with Receptacles

by Thomas A. Domitrovich

If there was ever a list of workhorse components in the electrical industry that are heavily used, sometimes abused, and called upon to perform over and over again safely and reliably, I would have to say that 15-A and 20-A receptacle devices rank high on that list. Read more

Perspectives on PV

A Closer Look at Batteries

by John Wiles

Energy storage systems, in the form of batteries, when included in a photovoltaic power system are a critical and important item that needs close scrutiny during the plan review and inspection process. Battery systems are found in both off-grid stand-alone PV systems and in battery-backed up, utility-interactive PV systems. See the March-April 2013 IAEI magazine for an overview of the battery-backed up, utility-interactive PV system. The following information will focus on the dc circuits associated with the battery system. Read more

Article 300 Continued: Electrical Inspections for the Combination Inspector

by Randy Hunter

In the last issue we ended with the requirements for underground installations in 300.5. We’ll pick up where we left off with 300.6, Protection against Corrosion and Deterioration. The basic requirement is that equipment must be suitable for the environment in which it is installed. Read more

Changes & Requirements for Receptacles, 2014 NEC

by Keith Lofland

A dozen changes and new requirements for receptacles made it into the 2014 NEC. These requirements range from controlled receptacle marking to placements to dimmer-control. This article gives a broad overview of these changes. Read more

Retirement, Succession Plans: "Must Haves” for Business Owners

by Jesse Abercrombie

If you own a business, you may well follow a "do it now” philosophy; which is, of course, necessary to keep things running smoothly. Still, you also need to think about tomorrow, which means you’ll want to take action on your own retirement and business succession plans. Read more

Grouping of Motors on a Single Branch Circuit

by Steve Douglas

What are the criteria for connecting more than one motor on a single branch circuit overcurrent device? To start to answer this question we need to re-visit the Canadian Electrical Code Part I (CE Code) definition of a branch circuit to recognize that a motor branch circuit is the circuit between the final overcurrent device and the motor including the conductor and the motor controller. Read more

Fountains and Reflection Pools

by Joseph Wages, Jr.

Fountains and reflection pools have been around for generations and make powerful statements and reminders of events that occurred at these locations. Beautifully built and constructed throughout the world, these locations are often works of art. Read more

The Canadian Electrical Code and Other Requirements

by Leslie Stoch, P. Eng.

The Canadian Electrical Code Part I is a voluntary standard for adoption and enforcement by Canada’s provinces and territories, with provincial and territorial amendments. We rely on the CEC to provide safety standards for installation of electrical wiring and equipment. Its stated purpose is preventing electrical fire and shock hazards. But not all of its requirements are between its covers. Sometimes, we must get into other publications to obtain more complete information. This article reviews some examples. Read more

PV Load-Side Feeder Taps – Compliant or Not?

by Jeff Greef

Most residential electrical services are not designed to accept two sources of power, but they are often utilized for the purpose of connecting PV systems in addition to utility power. NEC Article 705 provides accommodation for such connections, but sometimes these accommodations cannot be used without replacing the service enclosure, or adding a distribution panel, or making a supply-side connection, all of which entail additional cost. Occasionally installers get "creative” by tapping directly into feeder conductors coming off the service to a subpanel in the house. Article 705 is silent on this specific method, and controversy exists as to whether it is a compliant method at all. Read more

Protection of Electrical Conductors Against Exposure to Fire: What, Why and How

by Ark Tsisserev, P. Eng.

The subject of fire protection of electrical conductors appears to create some confusion in the industry, and this article attempts to clarify provisions of the National Building Code of Canada (NBCC 2010) in this regard. Read more

The Missing Link to Excellent Service

by Steve Foran

Over the last few weeks I have been on the receiving end of unprecedented levels of customer service — at both extremes of the spectrum. The four quick incidents that follow all happened during a weekend away with some old friends. Read more

Gloves, Arc Flash, and the New ASTM Test Method

by Hugh Hoagland

The 90-year-old technology of using rubber gloves for shock and leather gloves for protection of the rubber soon could be turned on its head by innovation. For years, we have heard the question, "What about gloves in arc flash?” The reason this question wasn’t answered sooner is complicated, but the standard is now available.Read more

Departments

Editorial

Standards — How important are they?

by David Clements

It seems that every time we turn the television on or check our mobile device we hear about a disaster: floods, tornadoes, wild fires and explosions. I recall, in 1992 while living in Nova Scotia, how an explosion at the Westray coal mine located in a small community of Plymouth, Nova Scotia, claimed the lives of 26 miners. The bodies of those miners were never recovered and remain deep within the mine. Justice Peter Richard in his report on the explosion and fire said, "The Westray story is a complex mosaic of actions, omissions, mistakes, incompetence, apathy, cynicism, stupidity and neglect.” Read more

UL Question Corner

If the nylon on THHN is scuffed, is the insulation damaged?

by Underwriters Laboratories

In the process of pulling THHN conductors through raceway we encountered some scuffing and scraping of the outer nylon conductor covering at the final fitting. The engineer says we ruined the conductor and wants it replaced. Does damage to the nylon covering constitute damage to the conductor insulation? Read more

Focus on the Code

Sole Connections

by Keith Lofland

Question: At 250.66(A) and (B), the Code refers to a "sole connection to the grounding electrode.” Please explain what sole connection means; and is the term sole connection defined anywhere in the NEC? Read more

Minutes

IAEI Activities | Minutes

Download the Chapter and Division minutes from the IAEI September/October 2013 issue. Read more


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