On Jan 30, 1:52 am, wrote:
Hello, I want to install new circuits in my basement and I want to do
it off of an electrical sub panel. The subs i see are only 1 phase.
How to I tap into the main box? Do i still use a double pole
breaker? Single pole breakers only go upto 30 amps. I want to run 4
separate circuits off the new box. Thanks.


OP-

I believe you mean "legs" ..........or do you really mean
phases...????

I suggest using a Square D QO Load Center..the one I'm thinking of has
8 breaker slots (100 or 125 amp rating; I think) & is feed 220V ( 2
legs) via a double pole breaker from the main.

Now you have sub panel that is mini version of your main...two legs,
across which you have 220V when you use a double pole breaker.

If you really mean phases & you're trying to get 3 phase power out of
a residential service you're sol unless you buy a phase converter.


but I'm pretty sure the first part of my answer will get the job done
for you, since it seems like you're just looking for more amps for a
heavier drawing load....and the way to get that is on a 220v circuit.

cheers
Bob