On Tue, Aug 1, 2023, 1:09 PM gene heskett <ghesk...@shentel.net> wrote:
> On 8/1/23 11:03, Nicholas Geovanis wrote: > > On Tue, Aug 1, 2023, 2:40 AM Michael Kjörling <2695bd53d...@ewoof.net > > <mailto:2695bd53d...@ewoof.net>> wrote: > > > > On 31 Jul 2023 15:21 -0400, from songb...@anthive.com > > <mailto:songb...@anthive.com> (songbird): > > > i do not run things for long when the power goes out > > > but the capacity for my needs is plenty and then i shut > > > down in an orderly fashion. most of the time i shut down > > > the computer system and unplug the power cord and the > > > network cables and antenna cables if there is a storm > > > coming through - just out of the idea that i don't really > > > want things to get fried. > > > I replaced the original 60 amp service in 2008 with a 200, and brought > this grandfathered 2970 house service up to code, doing all the internal > work myself. I have a big ups running everything but the lights and > printers in this room, got rid of the copper telephone because the cable > was 70 years old, 50 pair paper insulated cable they would not keep > working for a week at a time, so after 5 months of that I voted with my > wallet and hooked all that up to the cable system. I must have done > something right, I have not even blown a ccfl light bulb since and it > all runs 24/7/365.25. In your case then, you may need to pay attention to transients in your cabling plant. Everytime a large motor starts, revs or stops, those transients are hitting your cabling. My recollection is that you have machine tools in addition to electronics and climate control. Even more so then. Also grounding for your electrical system has to be proven over-adequate. And any possible ground-loops need to be found and remediated. > It's worth mentioning that with a good UPS you get power-conditioning, > > not just filtering and over/under-voltage protection. That can extend > > the lifetime of any electric motor or other device using the conditioned > > power. The UPS emits a controlled waveform beyond what your utility can > > provide. > > > > And numerous datacenters have begun using DC-powered racks. Less power > > loss in the individual transformers and motors in each racked server, > > less heat to be expelled. > >
