2020 National Electrical Code

2020 NEC, Section 800.44 | Installing Overhead Communications Wiring

In the past, Chapter 8 of the NEC has not gotten the attention it deserves. Article 800, General Requirements for Communications Systems, sets the ground rules for the installation of specific types of systems, such as broadband communications systems.

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Most Recent

2020 NEC, Section 712.2 DC | Microgrids and System Directories

Here’s how the 2020 NEC Article 712 has changed and expanded the identification requirements for microgrids and system directories.

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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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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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NEC Article 230, Services

Let’s take a closer look at Article 230 and the NEC 2020 Code changes, which covers service conductors and equipment for control and protection of services.

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Recently in 2020 National Electrical Code

2020 NEC – Tentative Interim Agreement RV Vehicles & Parks, Section 551.71(F), GFCI Protection

We are going to examine a TIA issued for the 2020 NEC regarding GFCI protection for recreational vehicle (RV) parks, covered in Article 551 of the NEC. The popularity of RVs continues to increase, especially during the pandemic. We also know that GFCI protection continues to be expanded with each successive code cycle. This TIA was published to clarify where protection is required in an RV park. Read more from our blog!

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NEC 70, Article 250, Section 250.121(B), Metal Frame of Building or Structure

Article 250 is arguably the most important article in NEC 70, and much of its content is devoted to the proper sizing and installation of equipment grounding conductors. First, let us consider the purpose of an equipment grounding conductor (EGC). We know that EGC’s provide a low impedance path from the equipment to the overcurrent protective device (or ground detector for high-impedance grounded systems) so that a fault condition can be quickly cleared. Hence, EGC’s are a critically important safeguard to persons and equipment.

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Electrical Job Site Management in Four Easy Steps

By the time the company makes it to the job site, considerable time and money have already been spent on the project. The electrical foreman has many responsibilities and can single–handedly be the cause of a failed project. The foreman needs to be the National Electrical Code guru, assistant to the Project Manager, Human Resources liaison, team coach, and much more. Like other positions in the field, the electrical foreman needs continuous training to keep on top of the game. Here are four easy steps for managing an electrical job site.

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2020 National Electrical Code: Article 330 Metal-Clad Cable Type MC

Metal-Clad (MC) Cable is used every day in the electrical industry. The true conduit benders hate it. The value engineering people love it. MC Cable is really a great product, has a wide variety of uses, and can be installed to look good. Let’s take a closer look at this industry workhorse: Metal-Clad Cable.

MC Cable Definition

MC Cable, by most common definition, is a factory assembly of one or more insulated circuit conductors enclosed in an armor of interlocking metal tape or a smooth or corrugated metal sheath. The smaller cables should be unsheathed by using an armored cutter like the famous “Roto-Split”. The fittings must be listed and identified for use. If the manufacturer provides anti-short bushings, they can be used. The bushings are not an NEC requirement since the listed MC connectors provide the conductor protection from sharp edges.

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Why Do Some Code Sections Differ from My Copy of the NEC?

Have you ever compared your NFPA 70 book with a colleague and found that there were differences, though both books were the same edition of the NEC? We know that we receive a new edition of the NEC every three years, but how does the Code change between cycles?

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Sizing Equipment Grounding Conductors (EGC) Table 250.122: What’s New in the 2020 NEC?

If you turn to Section 250.122 in your NEC, you find information that has assisted electricians sizing equipment grounding conductors (EGC) for longer than most electricians have even been twisting wire.If you were on the job in 1968, you would have turned to Table 250.95 in your NEC for this information instead of Table 250.122, but the information was essentially the same.In 1968 you also would have found that an ungrounded (hot) branch circuit conductor protected by a 6000-amp overcurrent device required no less than a 1200 kcmil aluminum equipment grounding conductor… assuming you were using an aluminum equipment grounding conductor. That information remained unchanged for 50 years. But as the saying goes, “All good things must come to an end.”

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Electrical Burial Depths and Procedures

Underground electrical installations can save labor hours, material costs, and provide protection to the installation. Sometimes going underground is the only logical path to get service from one point to another whether new construction or remodel work. Overall, there are not many electrical projects that don’t require a little digging in the dirt at some point. Let’s dust off the National Electrical Code (NEC) and review some Code pertaining to burial depths and standard operating procedures.

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Service Disconnects: How Many and Where to Put Them. What’s New For 2020?

NEC Section 230.71. Six Switches or Circuit Breakers in One Enclosure
Since the 1937 edition of the NEC, the service disconnecting means used to isolate a building’s premises wiring from the utility provider’s conductors has been allowed to consist of as few as one, but as many as six switches or sets of circuit breakers.

A veteran electrician would tell you that requirement (or permission, depending on your perspective) means six throws of the hand can be used to control all power on the property. Our veteran electrician is correct – if there is one electrical service on the property.

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Floor Heating Cable Systems

Under Floor Electric Cable and Cable Mat Systems are a great way to warm or even heat a space. These systems can be a supplemental or even a main source of heat in a variety of rooms. The systems can be installed under many types of floors such as tile, wood, concrete, vinyl, and even carpet. The manufacturers offer a variety or pre-engineered packaged units and even piece-by-piece options. The manufacturer’s step-by-step installation instructions must be used to install the heating cables, mats, spacers, thermostats, and other associated equipment. The instructions will also point us in the right direction as far as the branch circuit size but will most likely not give all of the needed information.

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Bathroom Branch Circuits in the 2020 NEC

Bathroom branch circuit requirements have changed for the 2020 Code cycle. The one 20-amp branch circuit traditionally required by NEC Section 210.11(C)(3) to feed only receptacles in dwelling unit bathroom(s) is now restricted to feeding only countertop receptacles in those same bathroom(s).

The receptacles permitted on this newly defined branch circuit include any countertop receptacles required to be within 3 feet of the bathroom’s sink basin and any other receptacle(s) installed to serve countertops or similar work surfaces in these bathroom(s).

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2020 National Electrical Code

2020 NEC, Section 800.44 | Installing Overhead Communications Wiring

Most Recent

2020 NEC, Section 712.2 DC | Microgrids and System Directories

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

2020 NEC Article 605 | Office Furnishings

NEC Article 230, Services

Recently in 2020 National Electrical Code

2020 NEC – Tentative Interim Agreement RV Vehicles & Parks, Section 551.71(F), GFCI Protection

NEC 70, Article 250, Section 250.121(B), Metal Frame of Building or Structure

Electrical Job Site Management in Four Easy Steps

2020 National Electrical Code: Article 330 Metal-Clad Cable Type MC

Why Do Some Code Sections Differ from My Copy of the NEC?

Sizing Equipment Grounding Conductors (EGC) Table 250.122: What’s New in the 2020 NEC?

Electrical Burial Depths and Procedures

Service Disconnects: How Many and Where to Put Them. What’s New For 2020?

Floor Heating Cable Systems

Bathroom Branch Circuits in the 2020 NEC

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2020 NEC, Section 800.44 | Installing Overhead Communications Wiring

2020 NEC, Section 712.2 DC | Microgrids and System Directories