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Back to Basics — The 480/277 V to 208/120 V Wye...

The most routinely encountered transformer installation is likely the common three-phase 480/277 volts (V) to 208/120 V wye dry-type transformer supplying a panelboard. Many...

High-Efficiency Transformers and the Electrical Distribution System

The transformer is one of the most basic of electrical equipment found in a power distribution system, and just when you thought that a...

Article 450 Transformers

As inspectors who are required to perform inspections in a wide variety of construction projects, we frequently see customer-owned transformers installed in larger projects....

Does the CE Code allow an outdoor dielectric liquid-filled transformer 1m...

The general requirements in the Canadian Electrical Code Part I (CE Code) covering clearance of outdoor oil-filled transformers to a building or openings are...

Introduction to Transformers

A transformer is an electromagnetic device without any moving parts that allows for changes in voltage, current, and impedance. The goal of an ac...

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...

Critical Systems Case Study: Ultra-Low Harmonic Drives Protect Transformers and Power...

According to the United States Geological Survey, the average American uses about 100 gallons of water each day. This, in turn, creates more than...

Installing and Inspecting Neon Transformers

Neon signs and field-installed skeleton tubing installations require a transformer or power supply to step up the voltage to a high level that will...

Feeder and Transformer Secondary Tap Conductors

Applying the rules of the 2002NECfor tap conductors is a topic that has generated many interesting code discussions on jobsites as well as at...
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