Tweakers' Asylum

That's odd

70.231.230.221

Neuro

In Reply to: RE: Thanks, but... posted by crossram2x4@aol.com on September 19, 2008 at 21:47:24

I don't see a GFCI either. That's odd. Perhaps Furman is using some other method to detect ground leaks?

Follow Ups:

I noticed something missing on the back panel....... - jea48 07:37:36 09/22/08 (0)
Usually by the power inlet of equipment you will see a UL or UL/CSA label.

Do you see the label anywhere on the unit?

If not, good chance, the unit is not UL or CSA tested for safety in the US or Canada.
RE: That's odd - crossram2x4@aol.com 16:54:24 09/21/08 (2)
It does say "GFCI Protected" on the back panel (see your picture) - don't know how...
- RE: That's odd - Neuro 17:30:48 09/21/08 (1)
  I saw that right after I posted. :)
  
  I just checked out the manual:
  
  Though virtually all domestically produced electronic equipment is designed to detect electrical shorts and other potentially
  dangerous equipment problems in the Line lead referenced to its Neutral, this is inadequate when power is symmetrical. With
  the IT-Reference 20i, both neutral and positive legs contain 60 VAC relative to their Ground tab. This is not a problem or safety
  hazard, unless there is a defect in either the IT-Reference 20i�s transformer, or the power supply of a connected component. In
  this instance, we need to assure that safety is always maintained. The solution is our GFCI (ground fault circuit interrupter).
  
  The Furman GFCI detects any imbalance in the current flowing in the two hot legs. The missing current is presumed to be
  flowing through the ground conductor (the round pin on an AC outlet). Ground current often indicates a dangerous partial
  or full short circuit. If an imbalance is detected, the GFCI will trip the main circuit breaker/power switch. To restore operation,
  correct the fault and turn the unit on again. 5 mA of current is enough to cause the GFCI to trip; to troubleshoot this type
  of problem, start with nothing connected to the IT-Reference 20i. Then, add each piece of equipment until the GFCI trips.
  Contact the manufacturer of the suspect unit for possible solutions.
  
  Apparently, a button on the front tests the GFCI. Furman might've designed their own GFCI, but I'm not sure. Can you open the top and take a look inside?
  - RE: That's odd - crossram2x4@aol.com 21:02:38 09/21/08 (0)
    To remove the "top cover", I will have to unplug everything and move the unit - all 85 lbs of it - to a table as the cover is one piece for the top and the sides and is removed by sliding it off the back of the unit. I will try it as soon as I can.

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