[Rack] UPS beeps at bottom of susan the rack; also: electrical state as of 9 AM thursday 20100812
jim at well.com
Thu Aug 12 10:54:16 PDT 2010
this email has two sections, one about the UPS at the
bottom of susan the rack, and the other a copy of the
electrical report i sent to the build list describing
the topology of electrical power for the space.
for rack-only interests, see the NOTE at third
paragraph of electrical report section.
---------UPS beeping in susan the rack----------
this morning (thursday 20100812, 8:45 AM) there was
beeping from what i believe is a UPS unit at the bottom
of susan the rack.
beeps came in sequences at about a half a second
apart; the sequences came intermittently, sometimes a
lot of beeps followed by a little silence, sometimes
a few beeps followed by a little silence; silent
intervals were a three or four to eight to twelve
seconds in length.
i shut off the unit at the bottom of susan the rack
and then powered it back on. the post power-bounce
beeps were fewer per sequence with longer silent
--------electrical topology for the space---------
last night i blew a fuse in the basement shutoff box
for the northwest sub-panel. the fuse controlled the
red power leg.
this morning i replaced the blown fuse and put an
additional fuse in the shutoff box.
NOTE: last night and this morning i shut off all
power to the northwest sub-panel in order to replace
the fuse. thus anything getting power from the
northwest, southwest, or southeast sub-panels lost
power for a few minutes last night and also this
here's topology and diagnosis tips:
* in the basement there are two shutoff boxes, one for
the northeast sub-panel (near the member shelves), the
other for the northcentral sub-panel (just outside the
entrance at the top of the stairs).
* the northcentral sub-panel feeds no sub-panels and
controls circuits for lights and receptacles along the
north and east walls.
* the northwest sub-panel feeds sub-panels in the dirty
shop, sewing area (southwest sub-panel), and near the
toilet and sink area (southeast sub-panel) as well as
ceiling power tracks, a few receptacles, and lights in
the western area of the space.
* the southwest sub-panel is controlled by a two-pole
breaker (i believe 40 Amps) in the northwest sub-panel.
be sure it's breaker in the northwest sub-panel is on
(switches point toward center of box).
* the southwest sub-panel controls receptacles near
the sewing area, electronics area, rack and storage
room, and darkroom. be sure all breaker switches in
the southwest sub-panel point toward the center of the
box (the on position). if any receptacles test hot,
then the black leg of the southwest sub-panel is hot.
there's no way yet to test the red leg; i'll have to
hook up a light circuit or two to be able to do this
(plan is for lights above the electronics area, and
possibly the sewing area).
* the dirty shop sub-panel shutoff is controlled by a
three-pole breaker at the bottom right of the
northwest sub-panel, which is off (switches point to
the outside of the sub-panel box) and should remain
* the dirty shop sub-panel currently does not control
* the southeast sub-panel shutoff is controlled by a
three-pole breaker at the bottom left of the northwest
sub-panel, which should be on (switches point toward
the center of the sub-panel box).
* the southeast sub-panel controls circuits around the
center island as well as the various sink and toilet
areas. all breakers (as of this writing, thursday
20100812) should be on (switches point toward the
center of the box). the receptacle in the single-gang
handy box near the oven should be hot (and is there
for the refrigerator).
i'll be out of town for a little over a week,
starting today, and back monday 20100823 or tuesday
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