: >I am getting ready to install a 2000W 240V heater that will be
: > by a 30A subpanel running off the main panel (10/3 w/g).
: > I have a "1/2 size" dual 15A breaker I pulled out of the main
: > while ago, but was thinking I will need a full size breaker,
: > the two 120V suppies to the heater will be running off
: > in the subpanel. The way the 1/2 size breaker feeds off the
: > is through only one "side", so that both 120V to the heater
: > essentially supplied by the same 120V feed from the main
panel, so the
: > two 120Vs to the heater will be "in phase". If I use a
: > breaker, then it will bridge the two sides of the subpanel,
so it will
: > supply the heater with two 120V from different phases. Is
: > correct assumption?
: > thx
: this is Turtle.
: Yes the above will work but you just broke the NEC code as to
having a 240 volt
: service breaker being joined together if one trips the other
will go with it.
: This only depends on how safe you want to be or does being in
code matter to
HUH? What are you talking about? If it's a split-phase system,
the breakers are required to be ganged. Flip one, they both
flip. Did I fall asleep or something?