Jun 02, 2021
Article 250 is arguably the most important article in NEC 70, and much of its content is devoted to the proper sizing and installation of equipment grounding conductors. First, let us consider the purpose of an equipment grounding conductor (EGC). We know that EGC’s provide a low impedance path from the equipment to the overcurrent protective device (or ground detector for high-impedance grounded systems) so that a fault condition can be quickly cleared. Hence, EGC’s are a critically important safeguard to persons and equipment.
May 05, 2021
The average consumer does not understand the potential dangers related to electricity and pools, so they rely on you, the electrical professional, to do it right. There have been 98 verifiable water deaths from electricity since 1986, but that is likely just the tip of a very large iceberg. A small amount of current can cause muscular paralysis and drowning. We have put together a basic checklist for electrical safety-related to pools. This list is not exhaustive. We will focus our attention on three important areas: grounding and equipotential bonding, GFCI protection, and corrosive environments.
May 05, 2021
By the time the company makes it to the job site, considerable time and money have already been spent on the project. The electrical foreman has many responsibilities and can single-handedly be the cause of a failed project. The foreman needs to be the National Electrical Code guru, assistant to the Project Manager, Human Resources liaison, team coach, and much more. Like other positions in the field, the electrical foreman needs continuous training to keep on top of the game. Here are four easy steps for managing an electrical job site.
May 05, 2021
In large commercial occupancies such as grocery stores, refrigeration is a necessary part of the business model. Coolers, refrigerators, and freezers line several isles containing produce, frozen food, meat, and dairy products. Connecting these indoor components to compressor and condenser units requires several hundred feet of refrigerant lines. These lines are typically field-installed copper pipe with many brazed joints. Pressure testing connections before beginning equipment startup is essential. The cost of refrigerant, malfunctioning equipment, environmental hazards, and the safety of occupants are good reasons to ensure leakproof refrigeration systems. Additionally, most mechanical codes and the Environmental Protection Agency (EPA) require pressure tests for new piping installations.
May 05, 2021
Our lives have become entwined with the use of plastic products. We are dependent on plastic for clothing, housewares, containers, automobiles, televisions, telephones, cosmetics, and much more. The amount of plastic produced is roughly 300 million metric tons per year. Eventually, these plastic products form large debris fields and are the most prevalent marine debris found in our oceans and great lakes.
May 05, 2021
Preventative maintenance (PM) is a service that offers early warning, brings peace of mind, and allows for revenue generation to security providers. Most Americans, since they began driving a car, know they need to change the oil in a vehicle on a regular basis. Most homeowners perform maintenance on their home on a yearly basis. Americans are used to the concept of PM. Failure to perform PM can be an expensive self-correcting injury; one not to be repeated without suffering. The question is, why would homeowners not want to perform PM of security systems that are entrusted to work at all times? PM and annual testing are generally only offered when required, such as quarterly and for annual fire alarm testing required by an insurance provider. While there are no current PM requirements or annual audit requirements for alarm and/or security systems, this may change in the future.
Apr 13, 2021
Licensed electricians will be in high demand! It will take licensed electricians to pull the electrical permits and to install all of the solar PV systems.
Apr 06, 2021
The future of the electrical trade is solar PV technology, and the future is upon us.
