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Calculator and pad for 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) Informational Note 4, 215.2(A)(1) Informational Notes 2 and 3, 310.15(A)(1) Informational Note 1, 647.4(D), 310.60(B) Informational Note 2, 455.6(A) Informational Note, and 695.7. Permitted or required amounts of voltage...
Issue: March/April 2020 Deadline: December 07, 2019 The 2020 edition of the National Electrical Code is here! We are interested in writers wanting to discuss the changes in residential dwellings, especially on the new changes focusing on emergency power disconnects. Residential service calculations and surge protection for dwelling units are also wanted. Alternatively, write an article for new installers on how...
Picture of the sun for PV solar arrays
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 years ago. Those fossil fuels are being depleted and are becoming increasingly more expensive to extract, process, and use. Our society of the future will, in large part, be...
Fire Safety Week
Research shows occupants may have less than two minutes to escape safely from the time the smoke alarm sounds Today’s home fires burn faster than ever, making escape planning all the more critical to home fire safety. Studies show that in the past, people had approximately 17 minutes to escape a typical home fire from the time the smoke alarm sounds. Now...
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 can often be identified and cited with a little research and a reference to the National Electrical Code (NEC) or a standard. The usual issues can range from installation quality...
Four Ontarians Critically Injured or Killed by Electricity in the Past 24 Hours. All of these incidents involved contact with overhead electrical wires.
Mississauga, ON (September 20, 2019) – In the last day, three confirmed electrical-related incidents that have involved four individuals have been reported on worksites across Ontario: two reported fatalities and two critical injuries. All of these incidents involved contact with overhead electrical wires. The Electrical Safety Authority is supporting the Ministry of Labour while each of these incidents are investigated. “In...
Aging Gracefully: Aging PV Installations
For many years, photovoltaic (PV) plants were designed to a 20-year system life based on the length of PV module warranties. It was generally assumed that when these (formerly) expensive components reached the end of their life, the remainder of the plant would likewise be ready for decommissioning. However, as margins decrease and equipment becomes more reliable, PV plant...
September 11, 2019 – To help provide answers to different stakeholders interested in energy storage system (ESS) technologies, National Fire Protection Association (NFPA) has released NFPA 855, Standard for the Installation of Stationary Energy Storage Systems, the first comprehensive collection of criteria for the fire protection of ESS installations. The standard provides requirements based on the technology used in ESS,...
PV Installations for the 2020 NEC
Let’s take a look at some of the more significant changes impacting photovoltaic (PV) installations once the 2020 National Electrical Code (NEC) is validated by the NFPA Standards Council. These changes can be found in Article 690, Solar Photovoltaic (PV) Systems. Additional PV-related changes are located in Article 705. Article 690 The first items are some relatively minor changes made to...
Adoptions of the 2017 NEC
The State of New Jersey has adopted the 2017 National Electrical Code (NEC) with an effective date of September 3, 2019. The Department of Consumer Affairs' Division of Codes and Standards announced the effective date of the following updated Construction Codes. These codes will make up the new Uniform Construction Codes (UCC) for the State. 2017 NEC National Electrical Code ...
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