I just added a sub panel for my workshop using a 50amp breaker at the main panel connecting to the sub panel via 6-3 cable. The 120 v single pole 20amp breaker / circuit works fine however I'm having trouble with the 240v side of the deal... I have a dble pole 30 amp breaker with a 10-3 cable running to a couple of quad boxes daisy chained together for an air conditioner/heater and other equipment. But the fuse blows every time a flip the breakers to on. Help please... I believe the problem resides in how I daisy chained them. So I guess the question is where do I connect the two(black and red) hot (120v) wires, and the (white)neutral as well as the ground. Thanks in advance for your help... Rayz

Not sure how you have 240 volt outlets "daisy chain". Can you provide pictures of your connections?

Also, is the breaker popping with the equipment attached or not.

If you are using regular recepticles, they need to be on 20 amp and not 30 amp breaker.
If you are going to a location, that goes to 2 boxes or directions. Then the black and white would be for 1 circuit, red and that same white would be the second circuit. Tie all grounds together.
These need to be on opposite phases.
"When I turn on breakers"?What breaker trips fuse?