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Are electric gadgets running/working or just switched/left on?

In normal usage(daily more-like), I use sentences/phrases such as:

  1. Water pumps are running.
  2. Switch on the fan.
  3. My system has been working for 20 days now.

Most of us use similar phrases too(even if our mother-tongue is not English, the closest match would still be among one of the three listed above).

I know that none of them are wrong. But when generally talking about electric/electronic devices or gadgets, should the verbs like running be used?

What other words are there that can be used instead?