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. 

“Where will you be 10 years from now if you keep on going the way you are going?” Napoleon Hill, one of the great writers on success, famously asked this question. When you apply it to the fire alarm and signaling business, it should give you pause.


For electrical contractors installing video surveillance and networked Internet protocol (IP) cameras, now is a great time to think outside of the proverbial box and look beyond the typical security applications of viewing and recording images of people, places and things.

Designers, contractors and authorities having jurisdiction often misunderstand the term “survivable.” They presume it means the installer has chosen to use either a Class A wiring scheme or has placed the circuits in metal raceway.


For security and life safety systems, reliable, high-quality power solutions are critical. Intrusion detection, access control, video surveillance, mass notification and fire systems count on superior uptime and 24/7 availability, which means consistent, dependable power.


Electrical Contractor

More on Systems

 
Control Cables in Cable Trays
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Cable trays can be a very convenient method of transporting large numbers of signaling, communications and control cables, as well as other cables, from one location in a facility to another. If cable trays are to be used, however, some specific requirements must be followed.

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Communication Systems Offer Routine Emergency Services
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A hostage situation can occur almost anywhere, anytime. But communication systems alert a building’s occupants to evacuate or take other appropriate action.

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Dealing with Obsolete Components
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It may seem unbelievable, but fiber optic links and networks have been used for over 20 years. The first telco networks were installed in the late 1970s and data links were already in use by 1980, when there were few personal computers (PCs) and computer networks.

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Refrigerator Branch Circuits, Machine Tool Wiring, Foreign Piping and More
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CODE CITATIONS Article 110 Requirements for Electrical Installations Article 210 Branch Circuits Article 250 Grounding Article 310 Conductors for General Wiring Article 404 Switches Article 408 Switchboards and Panelboards Article 670 Industrial Machinery Branch circuit for refrigerator in dwelling

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Fire Pumps and Alarm Systems, Circuits, Services, and More
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CODE CITATIONS Article 100—Definitions Article 210—Branch Circuits Article 230—Services Article 695—Fire Pumps Article 725—Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits Article 760—Fire Alarm Systems Article 770—Optical Fiber Cables and Raceways Article 800—Comm

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Calculating Fiber Optic Power Budgets
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After a fiber optic cable plant is installed, it may be used with several different types of fiber optic networks. Computer networks, telephone signals, video links, and even audio can be sent on the installed fibers. Each network type has a performance requirement for the fiber optic cable link.

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Seizing Opportunities to Install Open Systems
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“In 1998, I saw a presentation about integrated systems at a [National Electrical Contractors Association] NECA seminar. This year we’re going to do close to $7 to $8 million on integrated systems, not including the additional sales generated for the electrical side of our company.

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