Hi gang,
I have a potential project that seems to skirt the edges for standard feeder calculations. What I'm finding keeps referring me back to branch circuits, which is not my issue at the moment, and I'm wondering if someone would double check my thinking process on this. And yes, Connecticut still uses the '05 code.
Here's the fundamentals-
The project proposes a new separate 120/208Y 3Ph~4w equipment panel to supply the following equipment:
5) Taylor 794 twin soft-serve ice cream machines. ( 2) 3P ckts/machine; 19.0 MCA ckt-1; 15.0 MCA ckt-2 per spec cut sheet, or 34.0A per phase)
4) Frigidaire FCRS201LF commercial refrigerators. (6.6A@120V/unit per call to Frigidaire, no tech info available online)
1) Turbo Air MUR-48 undercounter refrigerator. (6.5A@120V/unit per spec cut sheet)
Here's how I've been working to size the panel feeder and panel. Does this make sense or am I missing something obvious...?
1. Largest units are the Taylors. I'm using the Min Ckt Amps as permitted in 440.35 and the 1st unit at 125% per 430.24.
34.0A x 1.25 = 42.5A for 1st unit
2. I then added the remaining 4 identical Taylors.
34.0A x 4 units = 136.0A
3. I totaled the Taylors,
42.5 + 136.0 = 178.5A
4. As long as these Taylors are not HVAC units, I believe 220.56 lets me apply a demand factor, 70% for 5 units.
178.5A x .70 = 124.95A
5. I added two Frigidaire's each on the A & B phases, the Turbo Air was added to the C phase. I didn't apply any demand factors to the fridge's because, well really, its a minor load.
124.95A + 6.6A + 6.6A = 138.15A Total Load
I believe I should be able to use a 150A (min), 200A (preferred) feeder for this panel.
Anybody have any thoughts, yea or nae on my feeder calc's? Any input would be appreciated.
I have a potential project that seems to skirt the edges for standard feeder calculations. What I'm finding keeps referring me back to branch circuits, which is not my issue at the moment, and I'm wondering if someone would double check my thinking process on this. And yes, Connecticut still uses the '05 code.
Here's the fundamentals-
The project proposes a new separate 120/208Y 3Ph~4w equipment panel to supply the following equipment:
5) Taylor 794 twin soft-serve ice cream machines. ( 2) 3P ckts/machine; 19.0 MCA ckt-1; 15.0 MCA ckt-2 per spec cut sheet, or 34.0A per phase)
4) Frigidaire FCRS201LF commercial refrigerators. (6.6A@120V/unit per call to Frigidaire, no tech info available online)
1) Turbo Air MUR-48 undercounter refrigerator. (6.5A@120V/unit per spec cut sheet)
Here's how I've been working to size the panel feeder and panel. Does this make sense or am I missing something obvious...?
1. Largest units are the Taylors. I'm using the Min Ckt Amps as permitted in 440.35 and the 1st unit at 125% per 430.24.
34.0A x 1.25 = 42.5A for 1st unit
2. I then added the remaining 4 identical Taylors.
34.0A x 4 units = 136.0A
3. I totaled the Taylors,
42.5 + 136.0 = 178.5A
4. As long as these Taylors are not HVAC units, I believe 220.56 lets me apply a demand factor, 70% for 5 units.
178.5A x .70 = 124.95A
5. I added two Frigidaire's each on the A & B phases, the Turbo Air was added to the C phase. I didn't apply any demand factors to the fridge's because, well really, its a minor load.
124.95A + 6.6A + 6.6A = 138.15A Total Load
I believe I should be able to use a 150A (min), 200A (preferred) feeder for this panel.
Anybody have any thoughts, yea or nae on my feeder calc's? Any input would be appreciated.