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  • Business Information and the Cloud

    I've seen a lot of changes in business computing over the last three decades. Once upon a time, all you needed was a large enough closet to house a server or two. And, of course, some cable looms to keep your cabling neat and tidy.

    A rack system on the wall supported a few ethernet switches to handle incoming cables and route them to the servers. To keep things cool, an air conditioner was ducted into the space, ensuring the equipment wouldn't overheat.

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  • Data Center Products: More than Just Neat and Tidy

    In a previous article, I mentioned how data centers evolved from tiny spare closets to huge data-only facilities, often housed underground.

    There's no doubt that as the need for big data and other information increases, the data centers that gather and distribute this information will evolve as well. And, they're getting huge.

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  • Keeping Current on Voltage-Testing Options

    Among the most basic tasks for electrical contractors is testing for the presence – or absence – of electrical voltage. Whether it’s simply to determine if a system is de-energized and safe to work on, or part of a more complicated troubleshooting exercise, voltage testing is a critical element in any contractor’s job. Choosing the right tester can be more than an issue of convenience, it also can make a difference in an electrician’s productivity – and, more importantly, safety.

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  • Input Sensors – Your eyes, fingers and…more?

    No need to "eyeball" it any more. Input sensors take the place of our human senses… and do a great job of it, to boot.

    There are several types of input sensors. One of the first I encountered was the photo electric sensor or photo eye. These eyes controlled remote relays with a set of integrated mechanical contacts. Located inside the sensor body, the contacts changed state with a tiny magnetic relay.

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  • Greenlee Offers 855GX IntelliBender, Advanced Bending Software via BendWorks

    Greenlee’s 855GX IntelliBender cable and conduit bender offers electrical contractors a programmable and portable bender capable of making the most advanced bends with relative ease and speed.

    It can bend 3/4-inch rigid in either of its 1-inch rigid or 1-inch EMT shoe grooves, and 1-to-2-inch rigid, EMT or conduit with just one shoe featuring smart sensors that know exactly what diameter conduit and type you are going to bend.

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  • Choosing the Right Input Sensor

    With so many types of input sensors available, you need to narrow down your selection to what will give you the feedback required. As with human "input sensors," each type has a dedicated function. You need to match the sensor with the object being sensed and what that feedback does.

    Another consideration is the action taken when the sensor notices a change of state. In our human example, a sudden bright light sends a signal to the brain, causing us to shield our eyes.

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