Our evaluation of the device could find no fault other than that caused by the thermal event.The resistance readings of the device motor were in specification, and when we swapped the damaged mains lead out with a known good one, the device functioned normally and within specification.The extension lead that was returned with the device was not originally supplied with it - the ifu for this device states 'do not use any adapter, simple or multiple, and/or extension cord.' there were no markings on the extension lead to indicate conformance to any recognised standard.What appeared to be the plug prongs of another device were trapped in one of the other sockets of the extension lead.
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It was initially reported that the patient plugged the unit into an extension cord and the power cord and the extension cord melted together.On return of the device and the extension lead for evaluation, damage was observed that was consistent with a thermal event having occurred between the plug and the extension socket.It was also observed that the prongs of the plug had detached from the plug and had remained in one of the sockets of the extension lead, potentially creating a risk of electrocution.Internal reference:- (b)(4).
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