The answer to this question is probably “NO”. In some cases, issues may arise but because the installation of electric panels is not mostly done by inexperienced persons, it is a rare occurrence to see an electric panel without a main breaker.
There are times when it looks like there is no main breaker, but logically there is one. The aim of this article is simple, to explain this point so that someone without prior knowledge of electricity understands what is been discussed. Real Estate agents and other professionals need to understand the ideas and concepts behind an electrical panel so that when it is been discussed, they would not seem lost.
The first and most important point is this, if there is a means of sending power to a home or household, there has to be a way of shutting it down. This is the basic principle of engineering; you do not start what you cannot stop. Without a main disconnect breaker, it would not be possible to shut down power supply to a household. Usually, the Main Disconnect Breaker is found in the electrical service panel. A fuse can do an equal job, the only problem is that it gets blown anytime there is a power surge or irregular current. Therefore, the frequency of replacement is high.