----- Original Message -----
From: "Adam Thompson" <athompson@merlin.mb.ca>
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. In some, the room lights were not covered by the EPO switch, in some they were. Emergency exit lamps will continue to be lit, as they have internal batteries, and are required by building/fire code.
Is it (somewhat) common for an EPO switch to only disconnect commercial power and leave local redundant power live? What sort of facilities would have this?
No... I just hadn't had my coffee yet that morning and I crossed the streams. That should be the response to the *ATS cutover*, not the Molly switch. If someone hits the Molly button, you don't *need* an alarm. :-} Cheers, -- jra -- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274