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  1. Ken Sellars

    Ground grid testing

    The NESC has no such requirement, and unfortunately, neither does NFPA 70B, of the NETA/Maintenance Testing Standard. Several references to IEEE 80-2000 are mentioned in these best-practice guidelines, where again you find "periodic" as a requirement. The best guidance I can give is that the...
  2. Ken Sellars

    Qualified person

    You ask a great question. I wrote a blog article about this very topic a few months ago. Let me know if you have any follow-up questions.
  3. Ken Sellars

    Rubber Gloves with No Leather Protector

    Phill, This specific guidance does not appear in Z462 or NFPA 70E. Table 4 in Z462 references the ASTM F496 standard. In addition to what Zarheer wrote, here is the quote from ASTM F496 that gives the specific guidance and allowance: "8.7.4 Protector gloves may be omitted for Class 0...
  4. Ken Sellars

    update TTT

    The options for getting up to date are: 1 - Attend the 4-day TTT class, which is held in Louisville. This is NOT mandatory. 2 - Attend the Alumni Seminar. This is held exclusively for e-Hazard TTT graduates. These are in fact held in Louisville, but are held for a limited time only AFTER an...
  5. Ken Sellars

    Can Anyone Describe an Arc Flash Event?

    Re: anyone describe about Arc Flash event? <t>An arc flash event does not necessarily have to include human interaction. If an arcing fault occurs in the equipment, then you have experienced an arc flash. The severity of damage is based on multiple factors, such as available fault current...
  6. Ken Sellars

    Labeling Panels

    The NEC has several locations that require labeling. In 110.16, we stumble across Arc Flash Hazard Warning requirements. Section (A) is somewhat generic, but in 2017, the NEC added (B), which specifically requires the following if the service is 1200 amps or higher: (1) Nominal system voltage...
  7. Ken Sellars

    Contracting Question

    Great question. If all electrical work is contracted out, the host employer ( your company in this case) is still responsible to make sure that the contractor is following applicable codes and safety standards, up to and including your local electrical safety program. Contractor/host employer...
  8. Ken Sellars

    Exemptions to Work Permit

    The idea of "working on" involves "coming into contact with energized conductors or circuit parts with the hands, feet, or other body parts, with tools, probes, or test equipment (PPE) a person is wearing" per the definition in Article 100 of NFPA 70E (pg. 15 of the 2015 edition). It is further...
  9. Ken Sellars

    "Risk Assessment Best Practices in the Design Phase" - Webinar - Electrical Business Magazine/iGard

    Great presentation. Very good approach to risk assessment and overall job safety.
  10. Ken Sellars

    Questions About GFCI Testing Schedules

    When testing GFCI receptacles, only the GFCI receptacle needs to be tested to ensure proper functioning, and this testing is required to be in accordance with the manufacturer’s instructions, including the test method. GFCI receptacles protect downstream receptacles inherently, as long as the...
  11. Ken Sellars

    Proximity Detector Question

    Thank you for your question. I am assuming you meant 600V, not 60V, so I will answer based on that assumption. The use of proximity detectors for verification purposes for lockout/tagout and/or creating an electrically safe work zone is not allowed in any circumstance. This is pointed out in...
  12. Ken Sellars

    Written Practice PDF Template? (US)

    Mike, You bring up a good point. As an electrician providing service to a client, this puts you in a unique situation. Here is how I would address the issue: 1. Ensure that YOU and/or your company has a written electrical safety program (ESP). This policy needs to address the major factors...