MCB Data Nameplate rating. How to know about the rating of MCB. A simple tutorial to provide all the relevant information about the MCB rating and Data printed on it. MCB is very common protection device used in domestic and industrial application and most of us have tried to buy MCB. It is very important device, which is to be procured with care. But when we use to visit shops or take advice of our “expert” electrician then in most of time, without any technical consideration they advise for...