**Back to basics - the Watt (or kW)**
When thinking about watts (W) or kilowatt (kW = 1000 W) it can be useful too keep in mind the fundamental ideas behind the unit. Watt is not a pure electrical...

**Our internet address and Vanity URLs**
Visitors who like to type web address rather then click menus may be interested in how our URL structure works.

**Electromagnetic Fields - Exposure Limits**
Exposure to time varying magnetic fields, from power frequencies to the gigahertz range can have harmful consequences. A lot of research has been conducted...

**International System of Units (SI System)**
The International System of Units (abbreviated SI) is the world's most widely used system of units. The system consists of a set of units and prefixes...

**IEC 60287 Current Capacity of Cables - An Introduction**
IEC 60287 "Calculation of the continuous current rating of cables (100% load factor)" is the International Standard which defines the procedures and equations...

**Electromagnetic Compatibility (EMC)**
Electromagnetic compatibility (EMC) is the study of coordinating electromagnetic fields give off equipment, with the withstand (compatibility) of other...

**IEC 61439 Verification Methods**
The (relatively new) switchgear and control gear standard, IEC 61439 'Low-voltage switchgear and controlgear assemblies' has three methods which can be...

**Understanding LV Circuit Breaker Fault Ratings**
I think this post is going to be helpful to several of our readers. While the IEC low voltage circuit breaker Standard [IEC 60947-2, Low voltage switchgear...

**What does N+1 mean?**
The term 'N+1' relates to redundancy and simply means that if you required 'N' items of equipment for something to work, you would have one additional...

**Generation of a Sine Wave**
A fundamental concept behind the operation of alternating current systems is that voltage and current waveforms will be sinusoidal – a Sine Wave. This...