|
2011 Changes to the NEC – 110.16
The following is an instructional page from our 2011 Changes to the NEC Textbook/DVD Package complete with graphics and video where applicable. As part of our on-going effort to provide free resources to help the industry, we will be sending this content as part of a series of newsletters. Each newsletter will feature pages taken directly from our textbooks. This can be a great training resource for your organization!
There are some important features in this text which help to highlight the changes that you should be aware of:
- Each Code section which contains a change includes a summary of the change, followed by a paraphrase of the NEC text affected by the change. Any specific change is denoted by underlined text and in the corresponding chapter color
- Graphics with green borders and 2011 CC icons next to the heading are graphics that contain a 2011 change; graphics without a green border or icon are graphics that support the concept being discussed, but nothing in the graphic was affected by a 2011 Code change.
2011 Changes to the NEC Part 1 |
110.16 Arc Flash Hazard Warning
The requirements for arc flash warning markings have been increased (again), and the title of this section has been revised.
110.16 Arc Flash Hazard Warning. Electrical equipment such as switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers in other than dwelling units that are likely to require examination, adjustment, servicing, or maintenance while energized must be field-marked to warn qualified persons of the danger associated with an arc flash from short circuits or ground faults. The field-marking must be clearly visible to qualified persons before they examine, adjust, service, or perform maintenance on the equipment.
 |
Figure 110-12 (Click on image to enlarge)
Author’s Comments:
- See the definition of “Qualified Person” in Article 100.
- This rule is meant to warn qualified persons who work on energized electrical systems that an arc flash hazard exists so they’ll select proper personal protective equipment (PPE) in accordance with industry accepted safe work practice standards.
Note 1: NFPA 70E, Standard for Electrical Safety in the Workplace, provides assistance in determining the severity of potential exposure, planning safe work practices, and selecting personal protective equipment.
ANALYSIS:The 2008 NEC used the term “other than dwelling occupancies” in this section. Due to this, the warnings required by this section didn’t apply to multifamily dwellings, despite the fact that they might have remarkably larger services than some nondwelling occupancies. The Code has been changed to require the marking on multifamily dwellings, but not the individual dwellings of a multifamily dwelling unit building to address that issue.
The title of this section was also revised. This section doesn’t provide any “protection” as the previous title (flash protection) implied. Rather, it provides for a warning against the hazards associated with an arc flash.
|
2011 NEC Changes DVD Package |
 |
Don't let the scale of the code changes intimidate you, this package will get you up to speed on the most essential 2011 NEC changes quickly. The book is well-organized, easy to follow, and the full-color illustrations bring the material to life. The DVDs bring together a group of experts from the field to discuss the changes and how they apply in the real-world.
This program includes the following items:
- Changes to the NEC 2011 Textbook
- Changes to the NEC 2011 DVD 1 & 2 includes Articles 90 - 810
Product Code: 11CCDVD
Price: $198.00
 |
|
