How many hours can an EMT work with out a break?

There is no federal law in the United States that limits the number of hours an EMT can work without a break. Some states and localities have their own laws or regulations on this matter, but they vary widely. For example, some states require EMTs to take a 30-minute break after every 4 hours of work, while others require a 10-minute break after every 2 hours of work. It is important for EMTs to be aware of the laws and regulations in their own jurisdiction and to follow them accordingly.