what practical value would this have on a typical circuit breaker panel?

Answer 1

For a house. The main breaker woulld be anywhere from 100 A to 400 A depending on the size of the house and the electrical requirements. The branch circuits would be 15 A for lighting and some plugs. The branch circuits for the kitchen would be 20 A. If there is a requirement for electrical kitchen apppliances those breakers would be 220 V and any where from 30 A to 50 A. The same holds for central air conditioning and the clothes dryer.

I hope this helps. Email me if you need more info.

Answer 2

You forgot to mention what "this" is. Are you asking what is a typical value like 100 amps or 200 amps? Are you asking how many breakers the panel can hold? Are you asking whether the panel enclosure is watertight or corrosion resistant? We need more detail to answer.