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> just by power cycling my laser printer which is plugged into the same circuit So I encountered in a previous IT helpdesk job a laser printer connected to one
by tenebrisalietum 6y ago
> just by power cycling my laser printer which is plugged into the same circuit
So I encountered in a previous IT helpdesk job a laser printer connected to one of the tower APC units, with a wattage display.
Laser printer (it was a Ricoh Aficio SP 4100-something MICR printer for checks IIRC) was connected to the battery backup set of receptacles for some odd reason.
Any time the laser printer would start up, or run, and I presume charge the fuser, it would briefly spike up to 900w and often set off an alarm. It was rated for 550w. I think sudden high loads like that could be damaging to the unit.
I would not attempt to connect a laser printer to a UPS at all, even if not connected to backup battery--IMHO it's in the same category as high-current devices like toasters and hair dryers. Many commercial copiers I've seen have some type of large surge protector but no UPS.
- BuildTheRobots 6y agoLaser printers plugged into UPS's aren't great (and then there was my previous boss who destroyed a pretty large unit by repeatedly boiling a kettle from it during a power cut), but it's worth pointing out that the OP had his laser plugged into the same circuit as the UPS but not onto the battery - I took that to mean it's on the same radial/ring/breaker rather than connected to the UPS at all. I'm guessing the surge current to the laser was causing the UPS to register a brownout and potentially not behave correctly at that point.
- WrtCdEvrydy 6y agoMy Cyberpower 1500VA actually says not to plug laser printers into the Battery Load side. It's rated for 1500W, but you know it won't work when the manufacturer says it.