troubleshooting NON-60 fuse problem

Discussion in 'General Electronics Chat' started by cccb, Jan 1, 2012.

  1. cccb

    Thread Starter New Member

    Jan 1, 2012
    trouble shooting Have fuse box with 2 NON-60 250V fuses one fuse is very hot to touch but not blowing what should I look for?
  2. jaygatsby

    New Member

    Nov 23, 2011
    A fireman.
  3. praondevou

    AAC Fanatic!

    Jul 9, 2011
    So that's a 60A fuse, right? Either you are near the maximum current for an extended amount of time or there could be a problem with the contact area the fuse has with the fuse holder.

    A very small contact area due to oxidation of either the fuse terminals or the fuse holder can cause overheating.

    Deenergize the whole circuit ! and then have a look if oxidation might be the problem, if that's the case clean both parts with for example a metal brush.
    strantor likes this.
  4. GetDeviceInfo

    AAC Fanatic!

    Jun 7, 2009
    as mentioned, check for contact corrosion on the fuse holder. If it's part of a disconnect, check your switch blades for corrosion and that your wire terminals are snug and free of temperature degradation. An ohm meter reading from input to output wire will give you some insight. Make sure all power has been removed.

    If all looks good, replace your fuse. It may have been opened but fused by higher than rated short circuit current. In doing so, you must investigate if the fuse has adequate rating for the source, specifically in regards to short circuit current ratings.
  5. strantor

    AAC Fanatic!

    Oct 3, 2010
    in addition to checking for corrosion, check the tightness of the fuse clips. if the fuse is easy to remove, its probably too loose.