The Problem - Consider this hypothetical example: an XHHW-2 circuit is designed for operation at 90°C. The engineer or designer believes...

Transformers are commonly specified and ordered based on a few key parameters, including the primary and secondary voltages, the apparent...

Electrical power systems engineers, especially those working on systems at the distribution level, are generally required to complete...

General - If you look closely at NEC Article 311 (in the 2020 edition of the Code), you'll see that there are ampacity tables referenced...

A short circuit, also known as a fault, occurs when energized conductors inadvertently come into contact with one another or another...

Transformers are an essential part of AC power systems. It was transformers that brought about the AC revolution across the world, thanks...

When reading through NEC ampacity tables you'll notice that many make reference to an assumed "thermal resistivity of 90°C*cm/W". What's...