I have not carried out a periodic inspection and test on a large installation for about a year. I have done quite a few domestics in the mean time and some small installations.
Yesterday I did a periodic inspection and test on a large warehouse with offices following a fire. I was assisted by another qualified person.
At the start of the job I found myself having to think hard on what I was doing and a lot slower then previously. A vintage MCCB panel and couple of 3 phase distribution boards.
I was back to my old form by late afternoon but conscious that I had suffered skill fade. I wondered how long it would take before it would take before I needed to work as an assistant to regain my competency?
Interestingly 2 No. outside sockets provided for vehicle charging. Type AC RCBOs protecting the sockets on a MEM 2 DB. PME earthing system and no additional measures for PME protection. 2 vehicles on charge. Unplugging 1 vehicle to loop test the socket and my Megger loop tester said no thanks less then 45Hz. I think that cannot be right as the mains is highly unlikely to be less than 50Hz plus or minus a gnat's do dar! Unplug the second vehicle and the loop tester on the 1st socket happily does the loop test. All test kit in good order and calibrated last Saturday.
One for Mike was my loop tester seeing a sub 50Hz harmonic from the vehicle on charge?
I am assessed once a year on my inspection and testing skills and have done so for the last 17 years. Would anyone else admit to experiencing skill fade whilst carrying out electrical work (not interested in your private life?
