There is not much info in the link given. It only mentions a preliminary finding of the cause of the incident. This was last modified February 5, 2008. The incident was Dec 7, 2005. Any new information on this 7 year old incident? I have to admit, my first thought about this was "problem exists between=20 meter and device under test but he fabricated a story to cover his butt". I couldn't find any other anecdotes or public safety announcements about=20 the meter or company. But I'll be careful to not measure a power strip with my $5 red ones=20 while switching a bench grinder on and off! Joe W On 9/2/2012 3:35 PM, Bob Blick wrote: > On Sun, Sep 2, 2012, at 11:37 AM, John Ferrell wrote: > >> As I see the photo evidence, Stupid laid a tool on top of a power >> terminal board and managed to generate magic smoke. >> There is no tool problem here. Stupid is as Stupid does! While you are >> certifying the meter give him a shot at the hammer & screwdriver! I bet >> they will do the same thing! >> Access to power connections must be controlled to keep Stupid from >> getting us all killed... > I disagree completely. That multimeter is category rated for 750 VAC and > it should not fail violently below that. Also you are reading more into > the report than it contains. But even if the electrician did have it on > top of a "terminal board", as long as it was below 500 volts it is still > within rating. > > And since you are not convinced by an investigation by Brookhaven > National Lab, I have seen one of the current generation (red) meter fail > instantly when connected to 240 VAC. > > I can also tell you how to blow one at 120VAC when set on the 200VAC > scale. Plug it into an outlet of a plain outlet strip (not a surge > suppressor). Plug your bench grinder or air compressor into the same > outlet strip and turn it on. Switch the outlet strip off. If it doesn't > blow the first time, try it a few more times. Those meters are junk and > are unsafe connected to mains power. > > They are fine for working on low voltage. But for anything potentially > deadly, use a quality meter. > > And if you are still not convinced, take a Harbor Freight meter into > direct sunlight. Notice it doesn't autozero anymore? Their stuff reeks > and that multimeter should not have a 200 or 1000 volt range. Take it > apart and look inside to convince yourself your life is worth more than > $4.99. > > BTW, the fuses inside are also not rated for the application. > > I have a few of their multimeters but I would never use them on AC. I've > taken too many chances already in my life and I learned from them. Don't > urge people to trust dangerous test equipment. The only stupid thing > that electrician did was trust Harbor Freight. If he'd used a quality > multimeter, nothing bad would have happened. > > Best regards, > > Bob > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .