MCB Burn Out Problems in India

Are you an insurance investigator?

I would think that any information you get in here, or any "anonymous" internet forum, is going to be pretty much worthless. What's to stop an unscrupulous respondent working for one mfr from posting bogus information about a competitor's product just to damage them?

Please check the kA rating if all other items are OK.

I have encountered with 258413582584 nos of MCB failures ranging from 5 to 500 Amp, make Electromaster since March 2007. All were burnt causing fire during switching on, but no reason could be explained.

258 billion failures? That's pretty high.

There's been a fair bit of publicity in the UK about counterfeit mcb's (and cables) on the market here. It is felt that these have been coming in from China. All the ones found and tested had serious problems many along the lines as you describe.

I would check that they really are from the manufacturer they are marked as. There is a fair bit of info on the web (esp UK sites) on how to do this.

Hi bro, You got to mention about where was the MCB burning, whether it was in a MCB Box, kWh meter box or Metal Panel etc. Casing of the Good MCB is usually made from the fire retardant materials so loosing connection, overloaded or short circuit in which make it over heated seldom to cause fire. Instead those PVC of cable insulations or the low quality plastic made terminals that usually burning first & causes fires most of the time...so check it out & make sure that the fire was coming from MCB or others. Cheers