Type: Lessons Learned
Publisher: Argonne National Laboratory, Argonne, IL
A technician was performing remote operations using telemanipulators when he heard a popping sound and saw a flash of light from overhead. The power cord was found to have been pinched in the Y motion cable pulley system causing a direct short and a spark. The equipment was tested and found to be properly grounded, eliminating risk of electrical shock to the operator. During installation of the master side of the telemanipulator, the power cord was draped over the top of the through tube to prevent it from hanging in front of the operator. The configuration of the cord over the through tube placed it in close proximity of multiple pinch points. The cord eventually managed to work its way into the pulley system for the Y motion cable which resulted in the short.
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