Yes you can. the problem is that when a breaker opens, you will not know which one. it is better to have a larger breaker in the main panel. if the load is over 50 amps, the sub panel will open.

You can run as many circuits as you want, up to what the sub-panel will allow, space wise. What is important is what you want to have on thoise circuits turned on at the same time. Quote: How many 20amp circuits can be safely run off a sub-panel supplied from a main panel’s 50amp breaker?

The National Electrical Code (NEC) specified that a lighting and appliance branch circuit panelboard could not contain more than 42 overcurrent devices (circuit breakers). That was the absolute maximum, unless the manufacturer specified a lower number, which was often the case for smaller panel boxes.

A 50 Amp split phase 120/240 VAC service should be capable of 50 Amps per leg for a total ampacity of 100 Amps.

6

Check what size cable you will need for the amperage chosen and the length. For example, 6-3G cable is designed for 50 amps when the length of wire does not exceed 55 feet. Beyond that length, a thicker wire is required, due to the voltage drop.

#4

Size & AMP Ratings

You can use a double breaker as two single breakers to supply 120 volt to two separate circuits.. If you have a 30 amp double breaker, you can connect a single 10 gauge hot wire and it will work for 120 volt.