Well after some investigation work including using a meggar meter on the suspect machine we had our answer. Yes there was a slight ground in the machine which was enough to trip a GFCI and the GFCI units he installed where working properly but when we went to examine the GFCI installed by Electrical Contractor when building was built earlier this year there was a big problem when tested the GFCI did not trip until well over 7 Milliamps of leakage far in excess of allowable 5 milliamps. It was then at first thinking a bad GFCI that I started looking it over and noticed UL mark was not the new reflective mark and other issues with stamping s etc. Ends up this GFCI is Counterfeit that UL and US Customs has been warning about from China and this electrician never should have installed it. which is one of many things I questioned about his work including why did he install residential load centers instead of commercial bolt down breaker panels knowing what this building was being used for. The electrical inspector should have never passed it either knowing manufacturing would be going on in here. When 400 amps service was put on building instead of 100 or 200 amps for warehouse use.
This company who made this GFCI General Protecht Ltd of China has been embroiled in several trademark infringement lawsuits and has had UL and CPSC looking at them yet there dangerous and illegal products have made it to our shores and there are enough Whore Electricians who will take the risk and knowingly install low cost generic GFCI knowing full well the danger they pose.
So for now the GFCI is changed and my friend is tracking down the slight short in yet another machine more than likely caused when it was moved and handled roughly.
UL Label is invalid and not reflective |
Thanks for this great post... Guangzhou Bosslyn Electric Co., Ltd specialized in manufacturing and supplying
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