Continuousloads
lighting loads:
warehouse 49,000sqft x .25 = 12250 va (from table220.12) x 1.25 for continuous = 15312 va 1st 12500 @ 100%, 50% there after(Table 220.42) = 12500 +(2812.5 *. .5) = 13906.25 va
Office 1000 sqft x 3.5 = 3500 va (from table 220.12) x 1.25 forcontinuous = 4375 va
Awning 600 sqft x 2 = 1200 va (from table 220.12) x 1.25 for continuous = 1500 va
Sum of continuous loads = 19781.25 x 1.25 forcontinuous = 24726.56 va
NonContinuous Loads
Office
NEC Calc 1,000 sqft x 1va = 1000va (220.14k2)Noderating applies.
Actual
Computerreceptacles x 2 @180va each = 360va
ScaleMonitor receptacles x 2 @ 180 va each = 360va
General usereceptacles x 4 @ 180va each = 720va
360va + 360va + 720va = 1440 va= 1440 va Largest of the 2 use this one.
Warehouse
PLC powersupply receptacle x 1 @ 180va
Scalemonitor receptacle x 2 @ 180va = 360va
General useReceptacles x 5 @ 180va = 900va
Awning
Receptacles for Dryers and tanks x 2 @ 180va= 360va
Totalof Non Continuous loads =
1440+180+360+900+360=
3240va(T220.44 for derating, less that 10kva @100%)= 3240va
Motor Loads:
1. 10 hppump 480v x 14A (table 430.250) x 1.732 = 11,639 va non-continuous
2. 10 hp pump 480v x 14A (table 430.250) x 1.732 = 11,639 va non-continuous
3. 5 hp compressor 480v x 7.6A (table 430.250) x 1.732 = 6,318va non-continuous
4. 28 hp pump 480v x 40A(table 430.250, 30hp) x 1.732 = 33,254 va non-continuous
5. 100 hp compressor 480v x 124A(table 430.250) x 1.732 = 143410 va x 1.25 (Largest motor430.24) = 103,088 va non-continuous
6. 100 hp backup compressor 480v x124A(table 430.250) x 1.732 = 103,088 va non-continuous, non-coincidalwith above, smaller of the 2 don?t count(220.60)
7. Blower 480v x 96A (T430.250) x 1.732 = 79,811va non continuous
8. Vacuum 480v x 52a(T430.250) x 1.732 = 43,230va non continuous
9. Waste Blower 480v x 7.6A(T430.250) (name Plate) x 1.732 = 4,557vanon continuous
10. 5 hp Compressor 480v x 7.6a(Table 430.250) x 1.732 = 6,318 vanon continuous
11. 10 hpAir wall, 480v x 14A(Table 430.250) x 1.732 = 11,639va
Total Motor loads Non Continuous = 311,493va
Total of all loads= 339,459va
Ok, this is what I have arrived at.
So, 339,459va/(480 x 1.732) = 408.31 amps
I would need an 600 amp rated panel? (is there something in the code book referencing standard panel board sizes? Like 240.6 does for breakers?)
450amp main
served by 600kcmil conductors (matched to load per 240.4c)
Or parralelled 4/0 conductors
*If I want to go big, Would i size my conductors, to my Main ocpd?
*Why do we not size the loads on the 120/208 side to a panel, then to a transformer, Then use the transformer in the service calc instead. Instead of calculating them all together?