A PNNL Field Technician supporting a project to install sensors at a non-PNNL facility in April 2016 experienced a mild shock while working with signal wires he assumed were part of a low voltage system (below 50V). He did not report the shock at the time because he believed it insignificant. A contractor electrician later discovered the system was carrying 120V. When the Field Technician returned to PNNL and discussed his work on the project with his Technical Team Lead (TTL), the TTL determined the shock should be reported to PNNL's Single Point of Contact. Lessons Learned: When designing systems with electrical interfaces, clearly specify the voltage limitations and requirements for all sources of hazardous energy in design plans. Before beginning work on energized equipment, verify a system is low voltage (less than 50V) or de-energize the equipment to remove risk of shock. Promptly report any shock so a required medical evaluation may be performed.
For additional information and a discussion of Lessons Learned, please open the article attachment.
You are accessing a U.S. Government information system.
Unauthorized or improper use or access of this system may result in disciplinary action, as well as civil and criminal penalties.
By using this information system, you understand and consent to the following:
You have no reasonable expectation of privacy when you use this information system; this includes any communications or data transiting,
stored on or traveling to or from this information system. At any time, and for any lawful government purpose, the government may monitor,
intercept, search and seize any communication or data transiting, stored on or traveling to or from this information system.
The government may disclose or use any communications or data transiting, stored on or traveling to or from this information system for any lawful government purpose.
Classified or Official Use Only information is not allowed on this website.
Need help? Contact the System Administrator 509-376-4821 or
firstname.lastname@example.org. Their hours of operation are 6 AM to 4 PM PT Monday through Thursday.