Mar 21, 2019
There are quite a few challenges to hurdle over when installing or upgrading HVAC systems for historic buildings. A major dilemma arises for HVAC technicians when you are charged with the task of providing a system that meets the needs of those occupying the building while also preserving as much...
Mar 05, 2019
Inrush current, also referred to as “locked rotor current,” is the excessive current flow experienced within a motor and its conductors during the first few moments following the energizing (switching on) of the motor. This current draw is sometimes referred to as “locked rotor current” because the current necessary at...
Mar 05, 2019
The NEC underwent some big changes in 2017, including the redefinition of wall space, when it comes to fixed cabinets installed along a wall space. Prior to 2017, a cabinet affixed to a wall in a bedroom, den, library, etc. simply broke that wall space into two separate wall spaces. The measurement along the wall ended once you reached the fixed cabinet, and a new measurement began at the other end of the cabinet – but not anymore!
Mar 01, 2019
Commercial HVACR systems make up a large portion of a building’s energy demands and need regular maintenance to operate at peak efficiency. Even with the best care, your HVACR system can develop problems that impact air and temperature quality, increase energy consumption, or damage system components. Common concerns with commercial...
Feb 05, 2019
For our typical AC electrical system, the purpose of the "Main Bonding Jumper" is to connectthe equipment grounding conductors (E.G.C.) contained in each branch-circuit andthe metal (conductive) service-disconnect enclosure to the Neutral Conductor of the electrical service. The reason for thisis: a driven or buried earth ground (e.g. Ground Rod)...
Feb 05, 2019
A “COMBINATION” Arc-Fault Circuit Breaker is NOT equivalent to a “DUAL-FUNCTION” Circuit Breaker. With ever changing electrical Code requirements, a circuit breaker with the ability to provide both Arc-Fault protection as well as Ground Fault (GFCI) protection was long overdue. But beware, the “combination” function that is identified on recently...
Jan 09, 2019
What are your responsibilities concerning meeting the requirements set by the Occupational Safety and Health Administration (OSHA)? The Occupational Safety and Health Act of 1970 was put into law and Congress created the Occupational Safety and Health Administration (OSHA) to assure safe and healthful working conditions for working men and...
Jan 09, 2019
As 2019 begins, the electrical industry is in a state of change with proposed changes to the 2017 NEC. As technologies have changed so have the needs to keep electrical safety current to these changes.
