Electrical Engineering Resource

Presented by:

Newsletter archives

    3 Ways UL 508A guarantees better panels

    The 411 on 508
    Standards are notoriously complex, so most people take it on faith that the UL sticker on the panel is all they need to check. But what exactly does that certification mean?

    The dark secret about "certified" control panels

    Dark secret
    Electrical control panels present more than a few safety risks, and panel buyers frequently don’t get the level of safety they assume they are buying.

    The surge in panel protection

    More dangers in the power world
    As the sophistication and functions of control panels have evolved over the years they have also become more fragile. Combine that with the dangerous power world we live in today, and protection from surges is more important than ever.

    Determining short circuit current ratings: Industrial control panels

    Calculate SCCR
    The short circuit current rating (SCCR) of a control panel is a critical figure to determine in order to adequately protect people who work on or around power equipment.

    Manual motor protectors or fuses: Which best protects motor drives?

    How to choose
    For most people, fuses are the default protection method when it comes to branch circuit protection for the inputs to motor drives. However, in certain applications, manual motor protectors could have many advantages over fuses.

    5 Things panel buyers need to look for

    Making the right choice
    There are thousands of panel makers to choose from, from very small startup operations to large organizations with decades of experience.

    The ABCs of MCBs in electrical control panels

    UL 489 vs. 1077
    Protecting circuits, electrical-control components, and loads is a central function of control panels. Unfortunately, identifying the appropriate protective devices is not a straightforward proposition for panel builders.

    Options for overcurrent protection devices (OCPDs) in control panels

    How to choose
    Like almost every piece of electrical equipment, control panels require protection from power quality issues and surges. Panel builders and end users have two main options for the overcurrent protection devices commonly included with panels.

    Selecting the right motor starter option

    How to choose
    It’s estimated that there are more than 300 million electrical motors installed worldwide. Application requirements necessitate motor starters in many of those installations. Of the various motor starter options, which is the best fit for your application?

    How do they apply to circuit breaker terminals?

    The rules
    Circuit breakers are often used to supply current to more than one load. The 2014 National Electrical Code (NEC) includes a number of requirements and specifications related to incoming feeder taps.

    Solving panel intermittency issues

    The weakest link
    Connectors can be the literal weakest link in a panel. Avoiding intermittent connectivity begins with selecting the right quality connectors.

    Boost wiring productivity

    Efficiency
    There is a saying in the industry that the top three causes of failure in the field are cables, cables and cables. The concept of more efficient wiring has long been sought after to boost productivity and longevity.

Copyright ©2017 Electrical Engineering Resource. All Rights Reserved. Cookies and Privacy Policy