Voltage Drop Calculations
Voltage drop is only mentioned in some sections of the NEC as informational notes, and is required to be calculated in other sections of the Code. These sections are 210.19(A)...
Back to Basics — The 480/277 V to 208/120 V Wye Transformer Installation
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 field electricians, design professionals, and inspectors...
Life Started with the Sun and Life Will Continue with the Sun
Our energy-intensive society has developed over the last 150 years using readily available fossil fuels that came from decayed plant matter produced through the process of photosynthesis many thousands of...
Solar PV Wiring Methods — Lessons Learned from the Test of Time
During an electrical inspection, it can be easy for an authority having jurisdiction (AHJ) to identify a problem or area of further examination if something just doesn’t look right. It...
Industry News
Happenings within the electrical industry