careless, unprofessional

For long time I have not written here, today after I saw the horrifying pictures of people jumping out of the carlton tower and hitting ground leading to their death, I thought I put down something. trapped-in-carlton-towers The cause of this is speculated as electric short circuit. And also some were mentioning of people at the ground were asking people struck in the last floor to jump to the plastic they were holding. During course of our house built and in office when we moved to new building we have come across some lapses, faults. Plenty of time I thought of mentioning them here, but never found time, here is one such thing...

This is one year old story, when installation of our home UPS happened. The installation guy came, though installation was included in the price, we had to make few phone calls to get him. I did not know if a local electrician could install, later I realized that I could have installed and infact made some changes by myself. He came and asked for the electrician who did the wiring of the house and started arguing with him on some points (he continued throughout installation, I will not cover those and few other mistakes). Finally made this kind of wire and completed installation.



The above looks quite fine. Can anybody notice what is the problem. Ok, below is the complete connection. He also told that in case of any problem with UPS remove A2 from UPS and connect to the B3, that is, bypass UPS and direct connection (as it was).



The problem with this setup is A2 was not female! So the mains current was directly exposed. 2-3 weeks after installation, the UPS fuse was blown and hence we did not have the power. I went to check and decided to bypass UPS (As instructed) and called the UPS guy to get the fuse (it was internal fuse not the external replacable one). While making direct, I felt something strange and luckily did not touch the A2 exposed contacts (Male)! I was mentally shocked and not physically. Luckily it was me. If anybody else it would have been disaster. Later on I fixed them properly.