The simple answer to this question is that for most businesses, the building load at the weekend is considerably less than it probably is during the week. It is best to test a generator at its worst case scenario, i.e. the point in time where the building load is at its highest. Remember, power cuts are indiscriminate, they won’t wait for the weekend when you have less building load to strike, so it’s best to be prepared.
Of course we know that it can often be difficult convincing management to carry out tests at peak times, and sometimes this just won’t be possible. But if you explain that the downtime will be only 20-30 seconds whilst the generator starts up and takes the load, they are more likely to agree to it. There is nothing to stop you running on generator for a couple of hours. At the end you will have 100% certainty in your power protection system.
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