On Jan 30, 3:52 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.

I had the same idea to power a tankless water heater but found it
better for My place to upgrade to a larger,higher amp panel..
Members here might need more info as to what Your existing set-up
is to give You the best help;;What amp is the main in Your box? Is the
existing panel full or are there unused circuits? Are You adding 15
amp circuits? 20 amp? larger? What amp is the service from the meter
outdoors? Do You have specific uses in mind for the new circuits so
the amp draw can be estimated or just general use?
I'm not a Sparkie but am interested after My recent upgrades..
Dean