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. 

There is an old saying that liars figure and figures lie, which implies that the truth can be a challenge to discern from both people and data. At a recent standards-making conference, I encountered some examples of this concept that seemed worth sharing.

For electrical contractors with a low-voltage or security division—or for any company involved in physical security and surveillance—keeping pace with new technology is one of the greatest challenges.

When I entered the business, I “sold” fire alarm systems. Codes at the time had begun to require that such systems be installed in some occupancies.

In its paper, “Intelligent Efficiency: Innovations Reshaping the Energy Efficiency Market,” Greentech Media notes that efficiency is an untapped energy resource that is already embedded in every commercial building, manufacturing facility and corporate campus.

More on Systems

Manufactured Wiring Systems, Receptacle Locations and More

Article 210 Branch Circuits Article 215 Feeders Article 240 Overcurrent Protection Article 300 Wiring Methods Article 320 Armored Cable Article 352 Rigid Nonmetallic Conduit Article 404 Switches Article 604 Manufactured Wiring Systems Article 680 Swimming Pools, Fountains and Similar Installations A

Retrofitting Fire Alarm Systems

Anyone planning to retrofit anything electrical in a building faces a difficult task at best. Only a true craftsman can successfully install something as a retrofit that looks like the original installation had included it.

The Importance of Systems Testing

When electrical contractors talk about (or are asked about) testing, one is usually not referring to the stress-inducing kind associated with obtaining the latest certification in the industry.

Conductors Connected in Parallel
by Staff |

Parallel conductors are often installed where large ampacity feeders or services are used. Total understanding of the paralleling requirements permitted in the National Electrical Code is necessary before attempting to design a large electrical system or install these conductors.

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.