|> | Has anyone seen a ground fault circuit interrupter (GFCI) that would
|> | inline with a computer server plug? These typically terminate with an
|> | C13 female plug end, so the GFCI adapter would need to be C14 to C13.
|> | We are finding when we aggregate a large number of servers with a single
|> | GFCI that we get false positives and end up shutting down whole banks of
|> | servers. So we want to try to isolate each GFCI to a single plug on
|> | server and see whether that improves reliability.
|> Do you have a reason to use GFCI on computer servers in the first place?
| The risk we wanted to protect against was someone opening the door to a
| computer rack, accidentally allowing a power cord to slip into the door
| seam, and then closing the door onto the cord, partly severing the power
| cord and electrifying the rack fixture. Our hope would be that the GFCI
| would trigger immediately upon severing of the power cord, thereby
| (hopefully) preventing a risk of electrocution. At the same time, we
| would want to localize the fault to a specific device and not take out the
| entire server farm.
You should tie up the cords better so they don't get near the door.
Get a big roll of those Velcro loop ties. Use regular nylon wire ties to
wrap around metal construction to make some loops ... one tie around the
metal bar, and another tie looped through the first tie. This creates a
hanging loop of the 2nd tie. Now loop the Velcro ties through this loop
to hold onto the cords.
|> How many computers are involved? What is the required circuit capacity
|> serving all these computers through the one GFCI you are serving them with
|> right now?
| Probably 5 to 10 servers per circuit. We seem to run about 10 to 20 amps
| at 125V for those servers.
|> What is the leakage current rating of the GFCI you are using now?
|> Is this GFCI an integrated outlet type, or a circuit breaker type?
| Unfortunately the GFCI we have today is integrated into the outlet, and I
| don't know the ratings. I was hoping to just localize a GFCI to each power
| cord to avoid the need to engineer a single common GFCI at the main outlet
| to the rack.
GFCIs integrated into the outlet are the 5ma type. Maybe you need the 30ma
type. Those are only available as circuit breaker types. The 5ma types are
best suited for cases where the conductive path includes water or earth. The
30ma types are more suited for what you describe.
How many circuits do you have serving computers in that room, where a circuit
is defined as having its own separate breaker/fuse in the panel?
Can you have a subpanel installed in, or very near, the computer room? One
problem with using breaker panel GFCI is that the wiring run from the panel
to the outlet contributes to the leakage a small amount.
Someone suggested using filtered power strips. Maybe a UPS on each could
help, as well.