On 9/15/21 08:58, Adam Thompson wrote:
Now I'm curious... in all of the DCs and COs I've worked in - to the best of my knowledge, I haven't personally tested this! - the EPO button does *not* switch to emergency power. It turns off ALL equipment power in the space - no lights, no klaxons, nothing. In simpler setups, the EPO is connected to the UPS so anything plugged in to the UPS does dark instantly. In one DC I'm familiar with, the EPO switch kills all the UPS output *and* uses several relays to kill commercial power at the same time.
That's my understanding as well. Not necessarily the room lights depending on the facility, but all equipment power. To be used if the space is on fire or someone is in the process of being electrocuted.
I've never seen a klaxon or audible alarm connected with EPO. Things just get very quiet.
-- Jay Hennigan - j...@west.net Network Engineering - CCIE #7880 503 897-8550 - WB6RDV
