--- title: Shaft Grounding in Hazardous Locations | AEGIS description: "Shaft grounding in Class I, Division 1/2 or Zone 1/2 areas, and IEEE-841 motors: When & how is it allowed? Find out here." --- [![Electro Static Energy](https://info.est-aegis.com/hubfs/raw_assets/public/public/images/logo-est.svg) ![AEGIS](https://info.est-aegis.com/hubfs/raw_assets/public/public/images/logo-aegis.svg)](https://www.est-aegis.com) [+1 207-998-5140](tel:+1%20207-988-5140) Search - [Products](https://www.est-aegis.com/products/) - [AEGIS® SGR – for motors under 500 HP/375 kW](https://www.est-aegis.com/product/sgr/) - [AEGIS® uKIT – for common NEMA/IEC frame size](https://www.est-aegis.com/product/sgr-ukit/) - [AEGIS® PRO Series – for motors over 300 HP/225 kW](https://www.est-aegis.com/product/pro-series/) - [AEGIS® RPPR – for reactor recirculating pumps](https://www.est-aegis.com/rppr-resources/) - [Shaft Voltage Testing and Accessories](https://www.est-aegis.com/product/mounting-accessories/) - [Online Product Catalog](https://catalog.est-aegis.com/) - [AEGIS® 2-Year Extended Warranty](https://www.est-aegis.com/product/extended-warranty/) - [Applications](https://www.est-aegis.com/applications/) - [Electric Vehicle Solutions](https://www.est-aegis.com/applications/electric-vehicle-solutions/) - [Food & Beverage](https://www.est-aegis.com/applications/food-beverage/) - [HVAC](https://www.est-aegis.com/applications/hvac/) - [Industrial & Chemical](https://www.est-aegis.com/applications/industrial-chemical/) - [Other Industries](https://www.est-aegis.com/applications/other-industries/) - [Power Generation & Renewable Energy](https://www.est-aegis.com/applications/power-generation-renewable-energy/) - [Transportation](https://www.est-aegis.com/applications/transportation/) - [Water Treatment](https://www.est-aegis.com/applications/water-treatment/) - [Bearing Protection](https://www.est-aegis.com/bearing-protection/) - [Shaft Voltage & Bearing Currents](https://www.est-aegis.com/bearing-protection/shaft-voltage-and-bearing-currents/) - [Fluting & Bearing Inspection](https://www.est-aegis.com/bearing-protection/fluting-and-bearing-inspection/) - [Best Practices & Installation](https://www.est-aegis.com/bearing-protection/best-practices-and-installation/) - [Resources](https://www.est-aegis.com/resources/) - [AEGIS® Bearing Protection Handbook](https://www.est-aegis.com/resources/handbook/) - [IEEE-841, Hazardous Locations, & AEGIS®](https://info.est-aegis.com/technical-codes-and-ieee-841-standards) - [Videos](https://www.est-aegis.com/resources/videos/) - [Technical Papers](https://www.est-aegis.com/resources/technical-papers/) - [Case Studies](https://www.est-aegis.com/resources/case-studies/) - [Specifying AEGIS®](https://www.est-aegis.com/resources/specifying-aegis/) - [Request Training](https://www.est-aegis.com/resources/training/) - [Product Sheets](https://www.est-aegis.com/resources/product-sheets/) - [About](https://www.est-aegis.com/about/) - [News](https://blog.est-aegis.com/tag/news?hsLang=en) - [Tradeshows](https://www.est-aegis.com/about/tradeshows/) - [Blog](https://blog.est-aegis.com/?hsLang=en) - [Where to Buy](https://www.est-aegis.com/where-to-buy/) - [Distributors](https://www.est-aegis.com/where-to-buy/distributors?type=Distributor) - [Trained Installers](https://www.est-aegis.com/where-to-buy/installers?type=Installer) - [Explosion Proof Installers](https://www.est-aegis.com/where-to-buy/installers?type=Explosion%20Proof%20Installer) - [Motors & Seals with AEGIS® Installed](https://www.est-aegis.com/where-to-buy/oems-with-aegis/) - [Contact Us](https://www.est-aegis.com/contact/) Toggle menu [tel:+1%20207-988-5140](tel:+1%20207-988-5140) # Shaft Grounding in Hazardous Locations In this Technical Bulletin, we summarize some recent changes to the National Electrical Code and Canadian Electrical Code, and IEEE Standards 841 and 1349.  Shaft grounding can now be used in Class I Division 2/Zone 2 areas when it can be shown not to cause risk of ignition, as well as inside XP, Ex d, and Ex ec motors.  Shaft grounding can also be added to IEEE-841 Standard motors in non-classified areas.   ##### For the full story, download the  AEGIS® Technical Bulletin:  *Shaft Bonding (Grounding) in Hazardous (Classified) Locations* ![Untitled-1 (1)](https://info.est-aegis.com/hs-fs/hubfs/Untitled-1%20(1).png?width=400&height=539&name=Untitled-1%20(1).png "Untitled-1 (1)") ## AEGIS® in Class I, Division 1/2 & Zone 1/2 Environments Underwriters Laboratories (UL) has an approved set of procedures for installing AEGIS Shaft Grounding Rings inside explosion proof (XP) motors. XP motors with AEGIS rings installed according to these procedures may be used in Class I: Division 1, and Class I: Division 2 designs. Because shaft grounding devices must be installed inside explosion proof enclosures (as per IEEE 303) for Class I: Division 2, they may not be installed internally or externally in/on a non-XP motor.  CSA has similar procedures for shaft grounding in Ex d motors. In Class I Division 2 and Zone 2, shaft grounding may be used on non-explosion proof motors provided that shaft grounding can be demonstrated nonincendive, as described in the technical bulletin available above. In both of these classes, safe shaft grounding is most easily obtained by purchasing an appropriately certified motor with AEGIS ring factory-installed.  Hazardous location motor lines with AEGIS can be found in this [Application Note](https://www.est-aegis.com/wp-content/uploads/ApplicationNote_HazardousLocations-1.pdf).   ## UL Approved Electric Motor Repair Companies To install AEGIS rings in explosion proof motors a motor repair shop must first be UL approved to work on all XP motors. They must then apply for certification for the addition of adding shaft grounding to their UL binder and then demonstrate adherence to the additional set of procedures required for installing shaft grounding inside of XP motors. Motor repair shops with UL certification to work on XP motors and certification of their ability to add shaft grounding can "rework" any size explosion proof motor and then re-nameplate the motor as explosion proof. The drawing below was created by UL to show where the ring must be installed to comply. ![UL](https://info.est-aegis.com/hs-fs/hubfs/UL.png?width=659&height=500&name=UL.png "UL") [UL Approved for Aegis](https://info.est-aegis.com/hubfs/UL_Approved_for_AEGIS.pdf?hsLang=en) ## Companies with UL Approval for AEGIS® Grounding Rings A+ Electric Motor Contact: Joe Perry 2025 1st Ave S Billings, MT 59101 Ph: 406 245-6191 Email: joe@apluselectricmotor.com Web: [www.apluselectricmotor.com](http://www.apluselectricmotor.com) Associated Electro-Mechanics Contact: Tim Aarons 185 Rowland Street Springfield, MA 01107 Ph: 413 233-5914 Email: taarons@aemservices.com Web: [www.aemservices.com](http://www.aemservices.com) Decatur Industrial Electric Inc Contact: Daniel Lang 1650 E Garfield Ave Decatur IL 62526-5108 Ph: 217 428-6621 Email: dlang@decaturindustrial.com Web: [decaturindustrialelectric.com](http://decaturindustrialelectric.com) ## Evans Enterprises, Inc. – all 10 locations Conway, AR Contact: Derek Lynch 1710 South Amity Road Ph: 501 327-0125 Email: derek.lynch@goevans.com Web: [www.goevans.com](http://www.goevans.com) Fort Smith, AR Contact: Steve Day 800 621-3589 - Toll Free 479 648-1500 – Phone Email: steve.day@goevans.com Rogers, AR Contact: Steve Day 800 346-4695 - Toll Free 479 636-0721 – Phone Email: steve.day@goevans.com Springfield, MO Contact: Bryan Whitman 800 375-8363 - Toll Free 417 886-8886 – Phone Email: bryan.whitman@goevans.com Oklahoma City, OK Contact: Shawn Andrews 800 423-8267 - Toll Free 405 631-1344 – Phone Email: shawn.andrews@goevans.com Pryor, OK Contact: Bennie Beneux 888 262-2256 - Toll Free 918 825-2200 – Phone Email: bennie.beneux@goevans.com Tulsa, OK Contact: Bennie Beneaux 888 577-1566 - Toll Free 918 587-1566 – Phone Email: bennie.beneux@goevans.com Abilene, TX Contact: Jerry Boroff 325 235-1776 – Phone Email: jerry.boroff@goevans.com Waco, TX Contact: Jerry Boroff 800 234-4129 - Toll Free 254 772-4710 – Phone Email: jerry.boroff@goevans.com Wichita Falls, TX Contact: Jerry Boroff 800 633-0812 - Toll Free 940 723-7466 – Phone Email: : jerry.boroff@goevans.com FA Farrar Contact: Kevin Judd 15 Avon St Keene, NH 03431 Ph: 603 352-4316 Email: info@fafarrar.com Web: [www.fafarrar.com](http://www.fafarrar.com) HECO – All Systems Go Contact: Justin Hatfield 3509 South Burdick Street Kalamazoo, MI 49001 Ph: 269 381-7200 Email: jhatfield@hecoinc.com Web: [www.hecoinc.com](http://www.hecoinc.com) Independent Electric Machinery Co Contact: David Launder, Jr 4425 Oliver Street Kansas City, KS 66106 Ph: 913 362-1155 Email: dave.launder@iemco.com Web: [www.iemco.com](http://www.iemco.com) Industrial Electro Mechanics Contact: Steve Carbone 1624 Dean Forest Road Savannah, GA 31408 Ph: 912-964-0884 Email: scarbone@iemsavannah.com Web: [www.iemsavannah.com](http://www.iemsavannah.com) Intermountain Motor Sales Contact: Jim Stout 2101 North 6 Mile Rd Casper, WY 82604 Ph: 307 472-0854 Email: jim@imscasper.com Koontz-Wagner Services Contact: Berl Hare 3801 Voorde Dr South Bend, IN 46628 Ph: 800 345-2051 Email: bhare@kwservices.com Web: [www.kwservices.com](http://www.kwservices.com) Malloy Electric Contact: Customer Service Dakota Dunes, SD 57049 Ph: 605 242-2000 Email: customerservice@malloyelectric.com Web: [www.malloyelectric.com](http://www.malloyelectric.com) Matlock Electric Co., Inc. Contact: Kevin Flynn 2780 Highland Ave Cincinnati, OH 45212 Ph: 513 731-9600 Email: service@matlockelectric.com Web: [www.matlockelectric.com](http://www.matlockelectric.com) Troy Industrial Solutions Contact: Dave Cook 70 Cohoes Rd Watervliet, NY 12189 Ph: 515 272-4920 Email: dcook@troyindustrial.com Web: [www.troyindustrialsolutions.com](http://www.troyindustrialsolutions.com) Vaughn Electric Co Inc. Contact: Kirk Kalb 313 E. Florida Avenue Union City, TN 38261 Ph: 731-446-4333 Email: kirk@vaughnelectric.com Web: [www.vaughnelectric.com](http://www.vaughnelectric.com) Whelco Industrial Contact: Tom Fisher 28210 Cedar Park Blvd Perrysburg, OH 43551 Ph: 419-385-4655 Email: tfisher@whelco.com Web: [www.whelco.com](http://www.whelco.com) ## Additional Resources We’ve got the resources you need to understand what causes electrical bearing damage, what solutions are needed, how to apply those solutions, and where to purchase everything you need to ensure bearing health. ![handbook-icon](https://info.est-aegis.com/hubfs/handbook-icon.png "handbook-icon") ### Bearing Protection Handbook [Learn More >](https://www.est-aegis.com/resources/handbook/) ![engineer-icon](https://info.est-aegis.com/hubfs/engineer-icon.png "engineer-icon") ### For Engineers   [Learn More >](https://www.est-aegis.com/resources/specifying-aegis/) ![training-icon](https://info.est-aegis.com/hubfs/training-icon.png "training-icon") ### Request Training   [Learn More >](https://www.est-aegis.com/resources/training/) ![aegis-icon](https://info.est-aegis.com/hubfs/aegis-icon.png "aegis-icon") ### Where to Buy   [Learn More >](https://www.est-aegis.com/where-to-buy/) ## Questions About AEGIS®? 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