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Wednesday, May 24, 2017

Monthly Archives: May 2009

Approaching the Inverter

/01/In our top-to-bottom perspective of a photovoltaic (PV) system, we are still on the dc circuits from the PV array and are approaching the...

GFCIs and Swimming Pools – A Natural Fit

Most of us have seen or read something about the figure commonly known as thefire triangle(oxygen, heat, and fuel), which is a working model...

Pools, Tubs, and Spas – Section 68

Between the 2006 Canadian Electrical Codeand the new 2009 edition in Section 68 we have six rule changes, one Appendix B change, and one...

Achieving Fire Protection of Electrical Life Safety Circuits

Wonderful though electricity was in its early days as a miraculous source of light and power, installations did seem to have a habit of...

The Challenge of Increasing Electrical Safety, Part 3

The common thread throughout the first two articles in this series has been the need for electrical inspectors to be armed with the facts...

In the Dark about Green Lighting?

With the eventual depletion of natural resources and the uncertain international situation, there is an increasing worldwide need for green, sustainable, energy efficient, stylish...

Transfer Equipment Used in Optional Standby Systems for Commercial Applications, Part I

Significant growth in optional standby systems for commercial applications is being driven by the demand for electrical power to be present that will ensure...

Occupational Electrical Injury and Fatality Trends and Statistics: 1992–2007

Next year we will commemorate the fortieth anniversary of the U.S. Department of Labor Occupational Safety and Health Administration (OSHA). Since its creation, overall...

Rule 36-110, Tables 33 and 34

Rule 36-110 refers us to Canadian Electrical Code Table 33, Horizontal Clearances from Adjacent Structures, and to Table 34, Vertical Clearances for Overhead Lines,...

Rating of Transformer Circuits

There are some subjects in the Canadian Electrical Code that often become a source of heated discussions by the users. Selection of dry type transformers...
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