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Jan1-13, 08:51 PM
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On the flip side of this, there is the case where the demand exceeds the available supply. In this case, utilities can reduce the voltage over the supply lines to homes and businesses by up to 5 percent, so that less current and hence less power is used by machines, appliances, lighting, etc. This 5 percent power reduction causes appliances to run a bit sluggish and lighting to be a bit dimmer, with I believe possible damage to equipment over long periods, but with no major issues if the period of reduction is not lengthy. Next step is to employ rolling blackouts. This was a bit more common years ago when supply was insufficient to meet peak demands (typically in hot summers), but there seems fortunately to be an abundance of power to share these days, at least in the US, perhaps not so in other countries (like Myanmar, for example, although that will change in the future when businesses increase their investments there).