Optional School Calc

Optional School Calculations Check Values

Find technique of solution in Reference Formulas Appendix page 27.

Find practice problems HERE.

If the service voltage is 240 volts, here are calculated check values. To get actual service sizes, use 240.6.

va/sq ft

5000 sq ft 
1 phase

5000 sq ft 
3 phase

10000 sq ft
1 phase

10000 sq ft
3 phase

15000 sq ft
1 phase

15000 sq ft
3 phase

15

250

144

500

288

750

432

20

328

189

656

378

778

449

25

354

204

708

408

1062

613

30

380

219

760

439

1140

658

 
 

Many electrician workbooks and practice exams are now available 
as digital downloads for immediate use. 
Click HERE to see what is available.

Products For Sale
2006-2011 David U. Larson
dularson@bellsouth.net
Companion Website to ElectricianEducation.com ,
2011NEC.com and
TechnicianEducation.com
Other websites by David U. Larson which may be of interest:
VisitEuropeOnline.com

OldPostcardsForSale.com
StampDealerLots.com 
HouseFlipGuide.com
SwedenRoots.com
GreenfieldVillageOnline.com
6901st.org