Solutions for Safety & Visual Communication

Favorites

Monday-Friday 5:30am-4:00pm PT

1-888-326-9244

Graphic Products
  • Resources
  • Support
  • Samples
  • Contact
  • Shop All Products
    CLOSE

    CATEGORIES
    • Printers
    • Printer Supply
    • Floor Marking
    • Pipe Marking
    • Signs & Labels
    • COVID-19 Solutions

    DuraLabel Kodiak

    DuraLabel Kodiak
    Multi-color, large format

    KODIAK SUPPLIES
    DuraLabel Toro

    DuraLabel Toro
    Portable, stand-alone

    TORO SUPPLIES
    DuraLabel Bronco

    DuraLabel Bronco
    Industrial, efficient

    BRONCO SUPPLIES
    DuraLabel Lobo

    DuraLabel Lobo
    Grab n' go labeler

    LOBO SUPPLIES
    DuraLabel Pro Series

    DuraLabel PRO 300
    Simple and reliable

    PRO 300 SUPPLIES

    LABELING SOFTWARE PRINTER ACCESSORIES PRINTER SUPPORT SHOP ALL PRINTERS
    SHOP BY APPLICATION
    Arc Flash GHS & HazCom Laboratory Pipe Labeling Wire Marking See All
    SUPPLY TYPE
    General Purpose High Visibility Low/High Temperatures Repositionable Tamper Resistant See All
    SHOP BY PRINTER
    Kodiak Supplies Toro Supplies Bronco Supplies Lobo Supplies DLP 300 Supplies See All

    RIBBONS PRINTER & SUPPLY BUNDLES SHOP ALL SUPPLIES
    FLOOR TAPES
    5S Aisle Glow in the Dark Reflective Anti-Slip See All
    FLOOR SIGNS
    BUNDLES
    SHAPES
    ACCESSORIES
    Applicators Stair Safety Floor Laminate
    Social Distancing Floor Signs

    SHOP ALL FLOOR TAPES
    STANDARD PIPE MARKERS
    Fire Quenching Flammable / Oxidizing Toxic or Corrosive Compressed Air Various Water See All
    AMMONIA
    Pipe Markers Component Markers See All
    SHOP BY STANDARD
    ANSI IIAR Pre-2007 ANSI
    flammable-pipe-markers

    ARROW BANDING TAPE ACCESSORIES VALVE TAGS SHOP ALL PIPE MARKERS
    SHOP BY SUBJECT
    Admittance Chemical Electrical Emergency PPE See All
    SHOP BY HEADER
    Caution Danger Notice Safety Warning See All
    COVID-19 Premade Signs

    SHOP ALL SAFETY SIGNS
    COVID-19 SOLUTIONS
    Safety Signs Printer Kits Awareness Posters A-Frame Signs Sneeze Guards
    SOCIAL DISTANCING
    Wall Signs & Labels Floor Signs Floor Tape Shop All
    COVID-19 BY INDUSTRY
    Grocery & Retail Medical & Healthcare Office Settings Restaurants & Food Service Food Manufacturing Construction
     
    Manufacturing Finance Transportation Education

    SHOP ALL COVID-19 SOLUTIONS
  • My Account
  • Quick Order
    Enter item SKU# and quantity
  • Cart()
Monday-Friday 5:30am-4:00pm PT 1-888-326-9244
Graphic Products
Menu Sign In
Products
Printers
Shop All Printers
Industrial Printers
Shop All Industrial Printers DuraLabel Toro DuraLabel Kodiak DuraLabel Bronco DuraLabel Lobo DuraLabel Pro 300
Bundles & Starter Kits
Shop All Bundles & Starter Kits
Labeling Software
Software DuraSuite Labeling Software LabelForge Labeling Software
Printer Supply
Shop All Printer Supply
Shop by Application
Shop All by Application Arc Flash GHS & Hazcom Laboratory Pipe Labeling Wire Marking
Shop by Supply Type
Shop All by Supply Type General Purpose High Visibility Low/High Temperatures Repositionable Tamper Resistant
Shop by Printer
Shop All by Printer DuraLabel Kodiak DuraLabel Toro DuraLabel Bronco DuraLabel Lobo DuraLabel Pro 300
Other
Shop All Other Ribbons Printer & Supply Bundle
Floor Marking
Shop All Floor Marking
Floor Tape
Shop All Floor Tape 5S Aisle Glow in the Dark Reflective Anti-Slip
Floor Signs
Shop All Floor Signs
Accessories
Shop All Accessories Stair Safety Floor Laminate
Other
Shop All Other Bundles Shapes
Safety Signs & Labels
Shop All Safety Signs
Shop by Subject
Shop All by Subject Admittance Chemical Electrical Emergency PPE
Shop by Header
Shop All by Header Caution Danger Notice Safety Warning
COVID-19 Solutions
Shop All COVID-19 Solutions
COVID-19 Solutions
Safety Signs Printer Kits Awareness Posters A-Frame Signs Sneeze Guards
Social Distancing
Wall Signs & Labels Floor Signs Floor Tape Shop All
COVID-19 by Industry
Grocery & Retail Medical & Healthcare Office Settings Restaurants & Food Service Food Manufacturing Construction Manufacturing Finance Transportation Education
Pipe Markers & Tags
Shop All Pipe Markers & Tags
Standard Pipe Markers
Shop All Standard Pipe Markers Fire Quenching Flammable/Oxidizing Toxic or Corrosive Compressed Air Various Water
Ammonia
Shop All Ammonia Pipe Markers Component Markers
Shop by Standard
Shop All by Standard ANSI IIAR Pre-2007 ANSI
Other
Shop All Other Arrow Banding Tape Accessories Valve Tags
Resources
Support
Free Samples
Contact Us
Cart
Sign In
  • Home
  • Resources
  • Articles
  • NEC 110 Labeling Requirements

NEC 110 Labeling Requirements

BY GRAPHIC PRODUCTS STAFF

The most recent NEC Article 110 had new labeling requirements updated in 2011. The latest labels are for equipment rating purposes. These are not arc flash labels. There are three parts to the "available fault current" labels:

  1. Labels are required to be field installed on new equipment
  2. The information on the labels must be checked when changes are made
  3. Some facilities are exempt from these requirements

The first requirement is that labels showing the maximum available fault current be field installed.

NEC 110.24 states:

Field Marking. Service equipment in other than dwelling units shall be legibly marked in the field with the maximum available fault current. The field marking(s) shall include the date the fault current calculation was performed and be of sufficient durability to withstand the environment involved.

This requires that service entrance equipment is labeled with the available short-circuit current available when the equipment is installed. Although the equipment may have been marked by the manufacturer, that is not the label that is needed. A fault study must be done to identify the maximum amount of fault current available. In many cases, this information comes from the utility. That information and the date it was determined must be put on a label that is field applied to the equipment.

The purpose of this label is to allow the Short Circuit Current Rating (SCCR) of the equipment to be easily compared with the maximum available fault current. An SCCR label is usually placed on the equipment by the manufacturer. NEC's definition of SCCR is, "The prospective symmetrical fault current at a nominal voltage to which an apparatus or system is able to be connected without sustaining damage exceeding defined acceptance criteria."

Available Fault-Current Labeling Chart
This free chart quickly highlights NEC standards for compliance.
Modifications. When modifications to the electrical installation occur that affect the maximum available fault current at the service, the maximum available fault current shall be verified or recalculated as necessary to ensure the service equipment ratings are sufficient for the maximum available fault current at the line terminals of the equipment. The required field marking(s) in 110.24(A) shall be adjusted to reflect the new level of maximum available fault current.

fault current labelThis states that the maximum available fault current must be verified or recalculated any time there is a possibility it has changed. This can be difficult because, in addition to changes you make within your facility, changes made by the utility can change the maximum available fault current. Fault current varies based on impedance, so any change in impedance will change the available fault current.

Another factor that makes this confusing is that the NEC code is not universally applied. It must be adopted by the governing authority within each state. By the end of 2011, 15 states were using the 2012 version, 25 states were using the 2008 version and two states were still using the 2005 version. This means that the Authority Having Jurisdiction (AHJ) determines what labeling must be done to meet code.

The final section added to NEC 110 is the exception:

Exception: The field marking requirements of 110.24(A) and 110.24 (B) shall not be required in industrial installations where conditions of maintenance and supervision ensure only qualified persons service this equipment.

This exception is included because qualified persons know that the maximum available fault current must never exceed the SCCR of the equipment. As a part of their normal work practices, they have the necessary test equipment and will check this when changes are made to keep labels up-to-date.

In addition to having the maximum available fault current and the date it was determined, the NEC code requires that the labels are able to withstand the environment in which they are located. This is a good reason to always use labels made with DuraLabel industrial label printers by Graphic Products. The DuraLabel labels have superior durability with over 50 types of supplies available. This means you can always get the right supply for the job.

Labels Warning About Deteriorating Agents

NEC is also concerned that the electrical system components are suitable for the environment in which they are used. This includes equipment such as cabinets, boxes, cable trays, raceways, conduit, elbows, fittings, couplings, supports, and support hardware. Designers and installers must select the right components based on temperature, the presence of moisture, corrosive gases, liquids, dust, sunlight or other environmental conditions that could deteriorate the equipment. Deteriorating agents include cleaning fluids, lubrication, and other workplace chemicals and substances that might come in contact with the equipment. Labeling that can survive these deteriorating agents should be used to warn about workplace substances that should not come in contact with electrical equipment.You can fulfill your labeling requirements and create custom electrical labels with DuraLabel industrial labeling kits.

Related Resources

Arc Flash Labels

Arc Flash Labels

Find out what details are needed for an NFPA 70E arc flash label, and how those requirements have changed over time

Read
Available Fault Current Labeling

Available Fault Current Reference

Quickly refer to the NEC requirements for fault current labeling.

Download
Arc Flash Labeling

Arc Flash Labeling

Learn the legal requirements and expert recommendations for creating effective arc flash warning labels.

Download
  • This free chart quickly highlights NEC standards for compliance.
Get the latest deals straight to your inbox
Trusted by These Companies
Starbucks
GM
Du Pont
Amazon
Disney
3M
Pepsi
NASA
Chevron
AT&T
Toyota
Coca-Cola
UPS
Target
  • Graphic Products, Inc.
    9825 SW Sunshine Ct
    Beaverton, OR
    97005 USA

  • 1-888-326-9244 (U.S./Canada)
  • +1-503-644-5572 (International)
  • Products
  • Printers
  • Printer Supplies
  • Safety Signs
  • Safety Labels
  • Floor Marking
  • Pipe Markers & Tags
  • Catalog
  • Support
  • Shipping & Returns
  • Manage Account
  • Printer Support
  • Warranties
  • Resources
  • Resource Center
  • Guides
  • Articles
  • Video Library
  • Safety Blog
  • Infographics
  • Webinars
  • Company
  • About Us
  • Careers
  • Become a Dealer
  • Find a Dealer
  • Press Room

Need Help?

Give us a call at 1-888-326-9244 and speak with an expert.

Customer Reviews
  • Copyright © 2021
  • All Rights Reserved
  • Terms and Conditions
  • Shipping and Returns
  • Privacy Policy
  • Do Not Sell My Personal Data