Power Problems

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  • H2OTech
    Junior Member
    • Nov 2015
    • 1
    #1

    Power Problems

    just checking what everyone else is seeing for neutral to ground voltage.
    i have a customer that has around 6.5 volts and the electrician says that is normal.
    the copier locks up on site but not here in the shop.
    i have logged it with a fluke 187 meter with recording function.
    Tags: power issue
    • Aneurysm
      Administrator

      1,000+ Posts
      • Jan 2005
      • 1079
      #2
      Welcome to Copytechnet.com, the best Copier, Printer, MFP tech site on the internet!
      "Remain calm. All is well." -Chip Diller, Nov 1963

        Comment

        • slimslob
          Retired

          Site Contributor
          25,000+ Posts
          • May 2013
          • 37460
          #3
          Re: Power Problems

          Glad to have your join us.

          6.5 volts neutral to ground is a little too high for most modern day MFP machines. I have always been told no more than 3 volts and even that is high for a dedicated circuit (hit, neutral and ground unbroken run to the distribution panel and no other outlets connected to the same circuit). If it is not on a dedicated circuit or the ground is through the building conduit instead of a separate ground lead, you most likely have a floating ground. It may have read 6.5 when you checked it but could jump to 16.5 when something kicks on or off.

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 23006
              #4
              Re: Power Problems

              Manufacturers requirements are typically a maximum of 0.5vac ground to neutral and 120vac +/- 10% hot to neutral, but that's more like a best case scenario. 0.5 to 1.0vac is what you might find in a normal situation. Over 1vac is a problem. 6.5 is not quite off the charts, but definitely too high. I've seen a few at 14vac, and on one occasion 45vac (off of an overloaded 5500W generator running our whole office during a power outage).

              On only one occasion have I seen a 0.00vac ground to neutral, and I think that the neutral was directly wired to the ground at the receptacle.
              The results of such power issues has been:

              intermittent DF jams, always the same code
              intermittent paper jams from one paper source, same code
              fuser errors
              finisher jams, finisher loses communication
              DF loses communication

              The most susceptible machines seem to be the 120VAC 16A MFPs sharing a circuit with anything. But the ones that surprise you are the 120VAC 12A MFPs that are sharing a 20A circuit with 5 printers, a refrigerator, a water cooler, and 10 PCs. =^..^=
              Last edited by blackcat4866; 07-07-2016, 01:48 AM.
              If you'd like a serious answer to your request:
              1) demonstrate that you've read the manual
              2) demonstrate that you made some attempt to fix it.
              3) if you're going to ask about jams include the jam code.
              4) if you're going to ask about an error code include the error code.
              5) You are the person onsite. Only you can make observations.

              blackcat: Master Of The Obvious =^..^=

                Comment

                • bob marley
                  Service Manager

                  1,000+ Posts
                  • Jan 2012
                  • 1339
                  #5
                  Re: Power Problems

                  Welcome
                  Live for yourself and you will live in vain. Live for others, and you will live again

                    Comment

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