|  | | | | | Arc flash reduction methods must be considered before working on energized electrical equipment for personnel safety. The idea behind energy reduction is to place energized electrical equipment in a state where less arc energy is available when an arcing fault occurs. These techniques range from the obvious (de-energize!) to more complex and costly... |
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| | Advertisement | MENNEKES Switched and Interlocked Receptacles are designed to eliminate potential Arc Flash and are OSHA LO/TO compliant. Rated NEMA 4X, units feature a 20A-100A pin and sleeve receptacle factory wired to an HP-rated switch. |
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| | | A popular form of budget cutting is to “defer” maintenance. The idea behind this is that if you don’t want something to break down, it just won’t. So (the theory goes) even though maintenance practices are set at financially optimal intervals, if you extend those intervals you will actually save money instead of lose it because deferring maintenanc... |
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| | Advertisement | Online Technician Certificates, in Automation, Electronics, Electromechanical, Electric Vehicles, PLCs and Robotics. Develop your technical skills using simulation software for a programming experience in a virtual manufacturing environment. |
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| | | A room air conditioner is considered a single-motor unit for the purpose of determining its branch circuit requirements if four conditions are met [440.62(A)]. |
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| | | Each of the machines has something wrong, such as a sequence not being performed. It’s not the same problem with each one. The plant engineer wants you to figure out what’s wrong and what should be done to fix it, along with identifying a methodology with no trial and no error. Where do you start? |
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| | | Do you know an up-and-coming young electrical professional who has shown extraordinary results on the job? If so, nominate him or her for consideration as an EC&M Under 30 All-Star. The deadline is April 24. |
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| | | Permits are one way to ensure safety in the workplace, but not all spaces require permits. While it doesn’t hurt to treat all unknown confined spaces as permit-required, workers and rescuers alike should be aware of the differences between these types of spaces in terms of their specific threats and the necessary precautions. Here’s what you need t... |
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| | | For many electricians, journeymen, and engineers, taking a licensing examination is one of the most important and challenging goals to achieve in their career journey. Once you accomplish this goal, you can create a more efficient and transparent path to success. This test is not just a test; it's a game changer. Being a licensed master electrician... |
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| | | During residential inspections, my biggest challenge is getting electricians and contractors to accept that the “old” way of installing smoke alarms and carbon monoxide (CO) detectors is no longer adequate. This is definitely what I consider a cross-code (or cross-over code) issue. Not only do electricians and builders not know the proper installat... |
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| | | This gallery features new product innovations in metering and monitoring equipment. Click through the following four slides to see the latest products, including a fire alarm system, power quality meter, data acquisition server, and more. |
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| | Advertisement | With a variety of educational courses to choose from on topics including safety and electrification, and CEU credits provided for your participation, the Facilities Expo is one show you don’t want to miss. Learn from industry experts, network, and explore solutions—all for free! |
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| | | Despite plenty of EC&M resources on grounding and bonding, including theory and specific rules on the topic, the simple question we continually get from electrical professionals in the field is: “So how do I have to ground and bond?” The National Electrical Code (NEC) lists eight specific methods to make grounding and bonding connections in Sec. 25... |
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| | | Fill in the blank. In mobile and manufactured homes, all 120V branch circuits that supply 15A and 20A outlets shall have _____ protection in accordance with 210.12. |
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| | | In Episode 24 of “EC&M Tech Talk,” Randy Barnett, a journeyman electrician, inspector, author, trainer, and electrical safety expert, reviews many of the requirements in the National Electrical Code, the NFPA 79, Standard for Industrial Machinery, and NFPA 70B, Standard for Electrical Equipment Maintenance. |
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| | | Case study demonstrates the importance of looking before you leap when investigating PQ problems. The operator of a large solar farm was experiencing nuisance interruptions, causing significant downtime. Read on to see what the power quality investigation uncovered. |
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| | | With the 2020 revision of the NEC, Art. 242 replaced two individual Articles that appeared in earlier editions of the Code – Art. 280 [Surge Arrestors] and Art. 285 [Transient Voltage Surge Suppressors (TVSSs)]. Implementing a good strategy for overvoltage protection encompasses the material contained in both of those prior Articles. |
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| | | Join us for this members-only editorial event as Randy Barnett, Electrical Codes Program Manager for NTT Training, puts the grounding and bonding rules of the NEC into perspective. |
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| | | The National Electrical Code (NEC) updates every three years and it's important for electrical professionals to stay on top of the changes in each Code cycle. That's why EC&M has teamed up with longstanding NEC Consultant Mike Holt to update our readers on the key changes made during the latest Code cycle. |
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| | | Take this quiz about circuit breaker safety and enter for a chance to win a $25 gift card to Amazon, iTunes, or Cabela’s! |
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