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Your Boiler’s Summer Vacation: Not All Fun and Games

Summer is the perfect time to inspect your boiler and ensure it works properly during the winter months. Here are some fireside and waterside inspection tips!

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Most Recent

  • NEC Section 210.11(C)(4) | Required Branch Circuits in a Dwelling Unit Garage

    Here’s a look at how the 2020 NEC has changed when it comes to electric vehicle charging in residential garages, and what changes may lie ahead in 2023!

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  • The Value of the Security Assessment

    These are three types of security risk assessments that you should be discussing with your customers to help them meet their goals and save money.

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  • 2020 NEC Article 605 | Office Furnishings

    Modular office furnishings present a special set of electrical hazards and requirements. To ensure a safe and functional installation, it’s vital for electrical professionals to familiarize themselves with these requirements.

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  • Cold Climate Heat Pumps

    New air source heat pump technology has come a long way, but there’s still a lot of work to be done to increase efficiency in northern climates!

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Short-Circuit Current-Rating (SCCR) VS. Available Fault Current: Understanding the Maze and What’s New for 2020

Section 408.6: A Brand-New Addition to the 2020 NEC 
NEC section 408.6 states: Switchboards, Switchgear, and Panelboards shall have a short-circuit current rating (SCCR) not less than the available fault current.  In other than one- and two-family dwelling units, the available fault current and the date the calculation was performed shall be field marked on the enclosure at the point of supply. The marking shall comply with 110.21(B)(3). 

Making NEC 408.6 Simple 
This new Code Section simply means that electrical panels including main-breaker and main-lug type panels and switchboards & switchgear equipment must be rated (in amps) to withstand the high levels of current that will flow should a short-to-ground or other fault occur at the equipment. In ALL locations other than dwelling units, that anticipated fault current must be marked on the equipment enclosure near where the supply conductors enter in, along with the date that the calculation producing that number was performed. The new Code Section also says the markings on the equipment must comply with 110.21(B)(3). Section 110.21(B)(3) tells us that markings must be sufficiently durable to withstand the environment. 

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