Integrated electrical and low-voltage systems of all types—inside and outside a building—encompass the range of work that electrical contractors do. The articles in this section highlight different types of work, from security, fire and life safety, to traditional electrical power and distribution, to lighting, cabling and more. 

In the past year, fiber optics underwent some important developments, some technical and some market-related. For those of you working in fiber optic network design and installation, the changes present opportunities and challenges.

This article is the first in a series that provides a step-by-step approach for performing arc flash calculations.
 Arc flash studies and software

I often give my power quality (PQ) 101 course to new engineers or salespeople. This introduction starts with the basics: an overview of PQ phenomena based on IEEE 1159 Table 4.2 followed by Ohm’s and Kirchhoff’s laws and how they apply to power quality.

We strive to protect building occupants, including our employees. Many years ago, the Occupational Safety and Health Administration (OSHA) formed to codify regulations in the area of employee protection.

More on Systems

Small Bites, Big Meetings: Make IRS Security Job a Success

It’s safe to say the Internal Revenue Service (IRS) keeps close watch on everyone’s money. Especially its own revenues and expenditures.

Extending Fiber's Reach

For almost 15 years, one had only two choices if installing fiber.

PVC Conduit Underground, Disconnect for Residentia

CODE CITATIONS Article 210 Branch Circuits Article 220 Branch Circuit, Feeder and Service Calculations Article 250 Grounding Article 352 Rigid Nonmetallic Conduit: Type RNC Article 422 Appliances Article 430 Motors, Motor Circuits, and Controllers Article 514 Motor Fuel Dispensing Facilities Article

Planning a Fire Alarm System Installation

Developing a ‘specialty’ crew is important The fire alarm system installation for most new building projects inevitably is a Division 16 responsibility.

Who Watches the Watchmen?

Backing up your backups—aka redundancy—is critical Having backup for the backup to the backup is the only way to go in power and systems. For the healthcare market, which provides critical and comprehensive care 24/7, it’s a necessity.

Testing Fiber Optic Loss

Two measurements of optical power required Compared to Category 5e or Category 6, fiber optics wire is easy to test. A “flashlight test” can make sure the fiber has continuity and is correctly identified.

Making the Grade

A system assessment is essentially a comprehensive overview of the structure, layout and functionality of any given system. In the world of electrical contractors, we are more often than not referring to networking systems, even though the same methodology applies to electrical systems.