Awasome Clock Runs Fast On One Home Socket References. At your cabin at the lake the mains supply probably come via long distance lines and transformers which act as low pass filters, thus letting the clock see mainly a quite clean 50. Unfortunately, a clogged filter is one of many things that can make your clock run fast.

Started to report the time a few minutes fast. As the other answers mentioned, an electronic clock has a quartz oscillator that sets the time counting speed. At your cabin at the lake the mains supply probably come via long distance lines and transformers which act as low pass filters, thus letting the clock see mainly a quite clean 50.