So each
channel is 10amps. So if I do 10amps times 24channels I get 240amps, correct? So if the electrician wires all 4 dimmers in the rack to 1 300amp
plug and
throw a 300amp
breaker in the panel I will be fine?
Yes and no.
Your assumptions are correct IF one assumes a single-phase 120V
power feed, HNG. In North America, and even in New Jersey, this is the first of three methods of powering dimmers.
#2: Single-phase 120/240V, also known as
split-phase or
bi-phase. Two hots,
neutral, and
ground. HHNG. Each hot
leg draws one-half the total
power.
#3: Three-phase 120/208V,
Wye connection. Three hots,
neutral, and
ground. HHHNG. Each hot
leg draws one-third the total
power.
Many/most
dimmer pack s (not racks) allow connection in any of the above three ways. The larger the pack/
dimmer rack, the less feasable the first two options become.
Now the first issue with your scheme is that there is no single-phase, HNG
plug capable of 300A. Even if there were, you couldn't afford it--
here's a typical 100A 3Ø plug: Hubbell HBL5100P9W; the mating female costs more! The second issue is that it sounds like you have one rack of four 6x1.2kW dimmers. So there's
power distribution going on inside the rack to each pack. Hopefully it was built and listed to UL standard, but probably wasn't. Post pictures. The last issue that must be at least mentioned is the
NEC code requirements that single-pole separable connectors are for use only by a
Qualified Person, per the NEC.
Provided the
dimmer rack is
listed, by NRTL for permanent installation (though I suspect it isn't), a safer, better plan is to have an electrician tie it in permanently to its
OCPD and forgo the
disconnect and connectors.
.