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Electrical Contractors, Inc.
April 13 , 1997
The City of Tigard
13125 SW Hall Blvd.
Tigard , OR 97220
Attn. Inspector Rudd
Re: Load calculation for the Roth Construction Co. for the
two story R.W. building at 12570 SW 69 Ave. Tigard.
Proposed Service: 600Amp 208V Three Phase
One 200 Amp Main Brker Three Phase Panel for each Floor
One 100 Amp Three Phase Fuse disconnect for Elevator Eq.
First Floor Sq. footage 3,984
Second Floor Sq. footage 4,233
Total Sq. footage 8,217
Gen. Lt. Load:
8217 Sq.ft.x 4.5 VA = 36,976.50 VA
Sign Circuit - 1200 VA
Total Continuos load - 38,176 VA
Receptacle Load:
66 Receptacles @ 180 VA each - 11,880 VA
10,000 VA @ 100% - 10,000 VA
1,880 VA @ 50% = 940 VA
Total Receptacle Load - 10,940 VA
Motor Loads:
Elevator 20 HP @ 208 Three Phase = 12,896 VA
Gas Heat
HVAC 8 -3 Ton Single Phase units @ 26.7 FLA each.
26.7 Amps x 8 = 213.6 Amps = 44,928 VA
Largest of the two = 44,928 VA
Continuos load from above 38,176 x 25% = 47,720 VA
Non Continuos load - 10,940 VA
Largest Motor Load - 44,928
Total VA 103,588 VA
103,588VA divided x 208x1.73 = 287.74 Amps
Thank You,
5" ',A
Don Rife
1901 Northeast 134th Place • Portland, Oregon 97230 • (503) 293 -8243, (503) 257 -4855 (fax)