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November/December 2007
Selective coordination ensures proper isolation and localization for all possible overcurrents (from overloads to maximum short-circuit currents at the point of application) to the nearest upstream overcurrent protective device and prevents unnecessary loss of power to other loads, especially loads essential for life safety. The Code requires selective coordination for all supply-side overcurrent protective devices [...]
Every prominent official of one of the electrical inspectors’ associations has frankly asked this question, What does the electrical industry think of the electrical inspector? I am going to answer in the same frank spirit and set down plainly what I find to be the feeling among electrical men. In a word, the electrical industry [...]
Sometime ago I was asked, “What guides you in making decisions at the board level?” “Before I enter any discussions, I ask myself, What’s best for our members?” I answered. It’s easy to forget and lose sight of the fact that we are a member association and while we face many challenges as a not-for-profit [...]
The Southern Nevada Chapter of IAEI sponsored a Medium Voltage seminar on August 25, 2007. It was held at the Clark County Development Services Center and instruction was provided by Mike Johnston (IAEI) and Chuck Mello (UL). Mike and Chuck developed the course on behalf of the IAEI at the request of Rick Maddox, international [...]
A national coalition will undertake the goal to educate the public, industry and elected officials about the critical role code officials play in improving the level of safety in the built environment. The Raise the Profile Coalition, committed to creating awareness about the important role code officials play in making everyday life safer, is made [...]
The NEC contains the minimum requirements for electrical installations to ensure they are essentially free from hazards. Compliance with the NEC rules means meeting minimum safety requirements established by qualified technical committees that respond to compelling reasons (substantiation) that result in the minimum requirements. So why would any jurisdiction delete requirements that are already minimum [...]
Businesses are under more pressure than ever to improve bottom-line performance. But it’s a misconception to think that removing the cost of electrical compliance will create “real” savings. The short-term cost benefits will be quickly outweighed when the lack of compliance creates a tragedy. To protect the health and safety of workers along with the [...]
Photovoltaic power systems are a rapidly growing (30+ percent/year) segment of the residential and commercial electrical systems market. These systems operate up to 600 volts and, in the larger commercial systems, the dc and ac currents can range up to 1000 amps. These levels of voltage and current, if not properly managed, pose both shock [...]
It is very reassuring for a feature columnist to know that his articles are actually read and discussed by the readers. I was pleased to get comments from the Canadian readers of the IAEI News on my column published in the July/August issue (page 38). That column described a comprehensive process developed by the CSA [...]
A great deal of wisdom and experience go into writing the rules of the Canadian Electrical Code; however, the reasons may not always be clear to its users and sometimes we’re not completely satisfied to follow the rules without understanding the reasons behind them. This article reviews several rules from Section 10, Grounding and Bonding, [...]