On Fri, 09 Dec 2016 19:44:01 +0000, CHARLES SALAMONE
m wrote:

replying to gfretwell, CHARLES SALAMONE wrote:
I am sorry, but what do you mean by "no 120v loads can be served?" When I
replace the garage fuse box with a breaker box I would like to have one 240v
switch for the sauna heater and two 120v switches for lights and outlets. And
the new breaker box will be connected to the 240v switch in the house through
the current 10 ga wire. Will that work?

You don't have enough wires. With the 2 wire plus ground UF you have,
you can only serve one circuit, 120 or 240. If you want both you need
3 wire +g..