1、Lessons Learned Entry: 0490Lesson Info:a71 Lesson Number: 0490a71 Lesson Date: 1996-12-24a71 Submitting Organization: JSCa71 Submitted by: L. UnderwoodSubject: Electric Shock Hazard - Russian 220v AC Circuits Description of Driving Event: International travelers should be prepared to deal with groun
2、ding problems that have been experienced by NASA personnel. As an example, several personnel have been electrically shocked while working at the Star City Training Complex and other Russian facilities. Improper or compromised grounding of 220v AC circuits has been found in these reported cases. Whil
3、e highly unusual for 220v, this event is known to occur in American facilities on occasion. Verification of grounds has been difficult in some cases, prompting the need for installation of independent ground to earth grounds.Reference(s): NASA JSC Safe Alert dated, 10/27/95Lesson(s) Learned: Electri
4、cal problems been attributed to the lack of verification of a proper ground of 220V AC power outlets.Recommendation(s): To prevent mishaps, the following actions may be taken:1. Adequate grounding of electrical outlets should be verified prior to connecting any equipment to a power source.2. If adeq
5、uate grounding from the facility outlets cannot be verified, an independent ground to earth ground should be installed.Evidence of Recurrence Control Effectiveness: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/ADocuments Related to Lesson: N/AMi
6、ssion Directorate(s): N/AAdditional Key Phrase(s): a71 Energya71 FacilitiesAdditional Info: Approval Info: a71 Approval Date: 1997-02-26a71 Approval Name: Ron Montaguea71 Approval Organization: NA3a71 Approval Phone Number: 281-483-8576Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
