I need some help regarding the power requirements. I have this Cisco 6503-E switch and I need to know what I need in terms of power.
The manual says if using 120VAC, I will need 16A. If using 230VAC, the unit will require 8A.
I have 2 dedicated 20amps circuits both at 120V. Am I correct on plugging each of the power supplies of the cisco unit to each of these circuits?
Another question will be, do I really need to dedicated 2 dedicated 20amps circuits for the unit? Can't I just use one dedicated 20amps circtuis and connect both power supplies to it?
I was just told to only utilize one UPS behind dedicated 20amp circuit #1 and connect the 6503-E PS1 in there. And for the second PS, PS2, I was told to directly (no UPS in between) connect it to the dedicated 20amp circuit outlet.
Are there any real disadvantages with this?
Heck no! I'd recommend it, i. e. PS1 feed goes to UPS and PS2 feed goes to "dirty" power (or the other way around).
One more thing, I'm no electrical engineer but have you verified how long will the UPS last in case of a power outage? I'd be happy if your UPS can provide continuous power to the PS1 for, say, 20 minutes.
Gee whiz. There's alot of things that could happen. For instance, a faulty UPS component could bring down the entire building's electrical system. Happened to me once. Lots of red faces (not mine).
what will happen? Will I be at risk of something?
For question 1, yes the 20amp circuits wll be fine.
For question 2, I think the mimumum requirement is 16amps, so 20amps per power supply would be better. Also remember there are 2 power supplies in the chassis for redundancy so connecting both power supplies to 1 power circuit will not provide any redundancy should that circuit go down.
I would say connect them to seperate power sources.