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Electrical Transformer Calculation
PRIMARY SIDE
208V, 3 phase
480V, 3 phase
100A fuse | 100A disconnect
100 A
110 A
125 A
150 A
175 A
200 A
225 A
Length
ft
Max Volt Drop
%
Copper:
(3#3Cu, 1#8Cu) 1" EMT
Voltage Drop:
13.84 V
(
4.99%
)
Aluminum:
(3#1Al, 1#6Cu) 1 1/4" EMT
Voltage Drop:
13.78 V
(
4.97%
)
Delta
Wye
15 kVA
30 kVA
45 kVA
75 kVA
112.5 kVA
150 kVA
225 kVA
300 kVA
500 kVA
Delta
Wye
Ground:
(1#2CU) 2" EMT
Copper:
(3#4/0Cu, 1#4Cu) 2" EMT
Voltage Drop:
5.97 V
(
4.98%
)
Aluminum:
(3#350Al, 1#2Cu) 2 1/2" EMT
Voltage Drop:
5.93 V
(
4.94%
)
Length
ft
Max Volt Drop
%
225A fuse | 400A disconnect
225 A
250 A
208V, 3 phase
480V, 3 phase
SECONDARY SIDE
... CALCULATING ...
No guarantees are made as to the accuracy of the calculation or compliance with local codes. Verify all calculations with a professional engineer. If you find an error, or have a suggestion, please send us an
email
.
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Construction Monkey was formed to fill a need in the Construction Industry that has been forming for several years. The industry has become increasingly dominated by General Contractors that subcontract more and more of the work and thus there are more subcontractors providing the real construction services on any given project. These subcontractors are burdened with the risk, performance, safety, quality, and management of the projects being built, while they are in a more competitive market space due to the nearly 800,000 specialty subcontractors in the US alone.
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