The latest 2023 edition of NFPA 780 covers traditional lightning protection techniques for a wide range of structures such as ordinary buildings, structures of wind turbines, watercraft, and those with flammable and explosive materials. The purpose of the standard is to safeguard persons and property from hazards arising from exposure ...
What is IP rating? IP rating or IEC 60529 grades the resistance of an enclosure against dust, water or other contaminants. It provides a list of the degree of protection offered by mechanical and electrical casings or enclosures. Electric equipment malfunctions or gets damaged when water or dust enters it. ...
The earth resistance value is a major concern when dealing with earthing of any structure. Earth resistance measurements and the use of earthing compounds helps to identify and achieve a recommended earth resistance for a structure. We know that soil resistivity is the prime factor contributing to the earth resistance ...
The process of electroplating is to coat a thin layer of metal on another metal to improve its physical and chemical properties. This is usually done by applying a direct electric current which helps to create a strong chemical bond between the two metals. Electroplating is generally done for two ...
We often hear about electrical accidents in commercial buildings, industries, and other facilities that cause huge losses like equipment, infrastructure and even human lives. These accidents often result from faulty or unsafe electrical practices or unnoticed worn-out electrical systems. The severity of the accident is increased with the absence ...
Electric power is distributed and used at the utility levels with the help of transmission systems, cables or other smaller conductors. Various type of electric cables is designed for specific requirements. The main aim of every type of electric cable is to conduct electricity or signals to the desired location. ...
Surge arresters are protective devices for safeguarding a piece of equipment from over-voltage transients by discharging or bypassing the surge current. It provides a low resistance path to the surge current protecting the system. The surge current can occur usually due to various reasons, like lightning or internal switching events. In ...
Fasteners are hardware components like screws, nuts and bolts that mechanically join two or more objects together. Fasteners are used to create non-permanent joints, that can be dismantled without damaging the joining objects. Unlike fasteners; welding, crimping, soldering are examples of creating permanent joints where the connected objects cannot be ...
Scope: The result of a ground electrode impedance, referenced to remote earth, and the current that flows through that electrode impedance is known as Ground Potential Rise or Earth Potential Rise (as specified in IEEE Standard 367). The maximum electrical potential that a (substation) grounding grid can achieve relative to ...
To grasp the concept of step and touch potential as per IEC 62305-3 (EN 62305-3) How energy dissipates over conductive objects. Some good conductors exist that provide a path to the ground during broken pole or downed wire conditions, such as metal fences, damp soil, and puddles. Other conductors, such ...
