diagram ingram

Building Electrical Design Order

a. Select voltage, phase
b. Do lighting calculation and layout lighting
c. Do heating calculations and select equipment
d. Lay out outlets
e. Circuit any special equipment
f. Fill out load calculation sheets and size panel
g. Make up panel directory
h. Balance panel
i. Size feeders to panel (just like branch circuits. 80% loaded wire same size or larger than ampacity of main breaker. 6/14/02 Chapter 3: NEC CODE Rules and Design Practice 7/13
j. Size grounding conductors
k. Fire alarm circuits must be tapped ahead of main breaker with a separate panel.
l. Do short circuit calculations,