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Columns

The Use of Overcurrent Protection in Plug-and-Socket Connected Equipment

Product Safety Newsletter - March/April 1990 Consider the “direct plug-in” Class 2 transformer-power supply commonly...

Understanding Symbols: Static Electricity Hazards

One of the critical building blocks for your product safety labels is symbols. This month,...

The Effect of the FCC’s New Rules on Testing Laboratories

The Federal Communication Commission (FCC) ended 2014 with an overhaul of its Rules for...

The View from the Chalkboard

This month’s edition can best be titled “If I knew then what I know...

The Pitfalls of Pass/Fail Testing

You’re at your desk when the phone rings. It’s one of your production lines;...
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The Reality of Engineering a Symposium

As far as I can tell, the first Symposium was described on papyrus by...

On Symbology: This “AND” That and the King Named Cat

Most readers of this magazine can speak aloud the title of this piece, "On...

Electrically-Caused Fire in Multilayer Circuit Boards

A few months ago, a colleague asked whether he needed a fuse in series...

Understanding Symbols: PPE and Universal Head Shape

In last year’s On Your Mark columns, we discussed key elements in helping to...

Theory of Equipment Grounding Impedance

Values for grounding impedance appear in many standards, including UL 478 and 1244, CSA...
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