I walked into a job with tripping breakers. I need to know the draw on DNAc, FMC/FTD, UCS. They have 770W dual power supplies.
We have two separate 30amp circuits that trip the breaker and it appears two rack PDU with 24 plugs where 22 are connected. The other 30amp has 24 plugs and 23 are plugged into.
Math to determine how many devices can be safely plugged into the circuit:
30amp circuit x 80% is 24 Amps.
24amps/1.5Amps means we can connect 16 devices pulling 1.5A.
I see amps = watts/current. amps = 770w power supply divided by 110v equals 7amps. That's higher than 1.5A so we can plug less devices into the PDU.
Can someone give me some real numbers on power planning Cisco devices?
