Systems

 

 

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. 

For years, there has been concern about the waking ability of fire alarm audible notification appliances. In general, they have gone through numerous changes since the 1980s. Back then, it was common to use bells to signal an alarm.

The marriage of digital technology, renewable energy and efficiency has been highly disruptive to the traditional utility business model. At the same time, according to a recent study, utilities can benefit, too.

A merger that has been in the works for years, and that has suffered some setbacks along the way, seems destined to happen after a court ruling last week.

The role of cars in power consumption and generation has taken a new twist. First electric vehicles (EVs) emerged as a viable alternative to driving on fossil fuels. Then the sophistication and capacity of battery technology expanded the utility of EVs into the realm of storage on the grid.

More on Systems

 
Gone Swimming

Equipotential bonding adjustments for pools in the 2008 NEC  


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California PUC Issues First State Video Franchise to Verizon
by Staff |

According to New York-based Verizon Communications Inc., when the California Public Utilities Commission awarded the first state-issued video franchise, it opened the possibility for hundreds of thousands more consumers to have the choice of the company’s FiOS TV, a digital, all fiber optic network


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VoIP May Get Caller ID with OpenID System
by Staff |

Currently, one of the biggest advantages traditional phone users have over VoIP phone users is the caller ID function. While landlines are linked to a physical address and mobile phones to credit cards, anyone can go to a Wi-Fi hotspot and start making calls over VoIP.


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In-Stat Research Finds Increase in VoIP Users
by Staff |

Cable operators and Vonage are driving continuing growth in the U.S. residential voice over Internet protocol (VoIP) telephone market, according to In-Stat, a Scottsdale, Ariz.-based market research firm. Data from the high-tech market research firm’s U.S.


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Surveillance with Smarts
by Staff |

Get on board with video intelligence


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Grounding Devices, Wiring and Grounding a Transformer and More

Article 200—Use and Identification of Grounded Conductors; Article 220—Branch-Circuit, Feeder and Service Calculations; Article 240—Overcurrent Protection; Article 310—Conductors for General Wiring; Article 314—Outlet, Device, Pull and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosure


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