Results 1 to 3 of 3

Thread: 55 Gallon Drum Cart Grounding and Bonding

  1. #1
    Join Date
    Jan 2017
    Location
    Port Arthur, TX, USA
    Posts
    1

    55 Gallon Drum Cart Grounding and Bonding

    First time poster, long time lurker, and colleague of the deceased weressl.

    If this is posted in the incorrect forum section, please move it for me.

    I recently received the following question with a picture from one of our sites.

    Are we required, or is there a RAGAGEP that would require us to order our drum carts with Sd (Static Dissipation) wheels?

    Name:  IMG_20170207_130006 (001).jpg
Views: 353
Size:  147.1 KB

    So... Some background.

    The drums as pictured, when they have material, are sealed and moved to the location as seen. This is in an unclassified location. No transfers take place in this area, and the drums are bonded and grounded using listed clamps.

    Normal procedure is as follows:

    The drums are disconnected from the grounding system wheeled into a CI, D2 area, and reconnected to the grounding system. The drum is opened, flammable material is transferred, the drum is sealed back up, disconnected from the grounding system, wheeled over to the unclassified location, and grounded.

    First thought was to treat this as a normal tank, but it isn't.

    My first stop was at NFPA 30 to determine if this is somehow a "portable container" and not a "drum".

    Drums are too small:
    3.3.51.4 Portable Tank. Any vessel having a liquid capacityover 60 gal (230 L) intended for storing liquids and not
    intended for fixed installation.

    The hazard that I think needs to be protected against would be static discharge while in the C1, D2 area while connecting the grounding clamp. But alas, since this condition only exists during abnormal conditions, so there should, in theory, be no flammable material to ignite under normal circumstances.

    I know the easy answer is to install Sd wheels, but I want to understand the "why"?

    I am interested in hearing your thoughts.

    -Regards

  2. #2
    Join Date
    Aug 2013
    Location
    New York, NY
    Posts
    387
    Quote Originally Posted by mtuaaron View Post
    First time poster, long time lurker, and colleague of the deceased weressl.

    If this is posted in the incorrect forum section, please move it for me.

    I recently received the following question with a picture from one of our sites.

    Are we required, or is there a RAGAGEP that would require us to order our drum carts with Sd (Static Dissipation) wheels?

    Name:  IMG_20170207_130006 (001).jpg
Views: 353
Size:  147.1 KB

    So... Some background.

    The drums as pictured, when they have material, are sealed and moved to the location as seen. This is in an unclassified location. No transfers take place in this area, and the drums are bonded and grounded using listed clamps.

    Normal procedure is as follows:

    The drums are disconnected from the grounding system wheeled into a CI, D2 area, and reconnected to the grounding system. The drum is opened, flammable material is transferred, the drum is sealed back up, disconnected from the grounding system, wheeled over to the unclassified location, and grounded.

    First thought was to treat this as a normal tank, but it isn't.

    My first stop was at NFPA 30 to determine if this is somehow a "portable container" and not a "drum".

    Drums are too small:
    3.3.51.4 Portable Tank. Any vessel having a liquid capacityover 60 gal (230 L) intended for storing liquids and not
    intended for fixed installation.

    The hazard that I think needs to be protected against would be static discharge while in the C1, D2 area while connecting the grounding clamp. But alas, since this condition only exists during abnormal conditions, so there should, in theory, be no flammable material to ignite under normal circumstances.

    I know the easy answer is to install Sd wheels, but I want to understand the "why"?

    I am interested in hearing your thoughts.

    -Regards
    If you're worried about static buildup during movement, attach a short length of (uncoated) 1/8" aircraft cable to the cart, and let it drag on the concrete floor. This will provide a path for any static charge to dissipate harmlessly.


    SceneryDriver

  3. #3
    Join Date
    Apr 2004
    Location
    Mission Viejo, CA
    Posts
    4,826
    There is no general mandatory requirement for static protection in classified locations. Some specific applications in Division 1. However, the proper reference standard is NFPA 77.
    "Bob"
    Robert B. Alexander, P.E.
    Answers based on 2014 NEC unless otherwise noted.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •