On Tue, 17 May 2016 20:06:14 -0700 (PDT), bob_villain
wrote:

On Tuesday, May 17, 2016 at 9:15:25 PM UTC-5, wrote:
On Tue, 17 May 2016 18:57:47 -0700 (PDT), bob_villain
wrote:

I want to put a sub-panel in a connected garage. Can I use 6-ga. 3-wire to supply a panel with 4 breakers (20A each)? Do you have to consider the possible use of all of the circuits carrying the maximum load? Thanks!
You can if you put it on a 40 amp breaker --- You DO need a feed
breaker for the panel.

So you're saying a 40A feed breaker and the sub panel can have 2 20A breakers?
It can have 4.
Look at your common 100 amp breaker panel - room for 32 breakers -
even at 15 amps each, that's WAY over 100 amps. It's over 200.

Even if it's only an 18 slot panel - the range and drier alone acount
fot 90 amps??? Add cental air for another 20.