|  | | | | | NEC Chapter 6 Articles found contain diverse, unique, or complex equipment system requirements that may require specialized training. In addition, the wiring methods for the equipment included in these Articles may modify requirements from Chapter 3. They supplement or amend the basics you learned in Chapters 1-4 (Figure 90.3), so be prepared to me... |
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| | | When it comes to memorable Code revision cycles, this edition will be remembered for making the NEC an easier document to use. Here’s a look at the top 25 revisions. |
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| | | The four-year program includes 576 classroom hours and 8,000 hours of work experience. It combines hands-on lab work and online learning using Mike Holt’s Electrical Apprenticeship Curriculum. |
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| | | In Episode 3 of “EC&M Asks,” a new video series featuring subject matter experts (SMEs) answering reader-submitted questions regarding popular electrical topics, Electrical Trainer Harold De Loach shares tips for understanding the Chapter layout of the NEC. |
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| | | Safety violations happen. Generally, they exist due to a combination of circumstances that may include an individual’s failure to comply with existing policy. They may or may not be the fault of company management. However, OSHA violations exist due to a weakness in the company’s safety policies. They usually are the fault of company management. |
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| | | A 500A, 3-phase 480V breaker tripped during a generator test at a hospital. The breaker has been in service for nine months. It provides power to a 300kVA, 480V to 240/120V step-down transformer providing power to one of three floors in the patient tower. No new loads have recently been added. The generator test has been performed nine times prior ... |
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| | | As an inspector, I frequently run across improperly placed junction boxes (JBs) in firewalls (e.g., fire-rated assemblies). This article will highlight the improper installation of JBs and shed light on the fire blocking problems I find in the field. Although the proper placement of JBs and fire blocking can be a problem in residential construction... |
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| | | Over the past year, interest in electric vehicles (EVs) has grown dramatically. With gas prices hitting record levels, the switch from internal combustion engine cars to electric cars might be even quicker than initially anticipated. But many buyers are still concerned about how they can charge their cars. As a result, a broader charging network wi... |
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| | | It’s much easier to protect yourself from obvious dangers than from ones you actually have to look for. Many are just hidden from plain sight, such as a bear trap covered with twigs and leaves. Here are 10 to look for. |
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| | | Mike, the electrical supervisor over Building No. 3, told you about a problem your predecessor failed to address. A couple of motors had an excessive failure rate. Over the past five years, one of them was replaced three times and the other four times. It doesn't seem to be a voltage imbalance or some other power quality issue. He doesn’t have any ... |
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| | | With the holiday fast approaching, here's a little trivia to see how well you know your Thanksgiving facts. |
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| | | Art. 440, Part I provides the NEC general requirements for air-conditioning and refrigerating equipment. This article has an unusual aspect to it, compared to other NEC articles — it’s essentially a supplement to Art. 430 (motors). It covers a special type of motor, namely ones that are hermetically sealed. They are hermetically sealed because they... |
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| | | Take this quiz about holiday lighting and enter for a chance to win a $25 gift card to Amazon, iTunes, or Cabela’s! |
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