This document calculates the total demand current for an electrical load consisting of:
- 21 lighting points and 12 double outlets, contributing 5A and 15A respectively
- 15 single outlets contributing 10A
- A 6kW oven contributing 0.5A
- A 2.4kW water heater contributing 0.33A
The total demand current calculated is 45.83A.
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Electrical load calculation
1.
2.
3.
4.
5. 21 x lighting points
12 x double 10 A socket-outlets
1 x 15 A socket-outlet
1 x 230 V, 6.0 kW oven
1 x 230 V, 2.4 kW instantaneous water heater
6.
7.
8. Load Description Current Calculation Demand
Group of load allowance current
(column 1) (given list) per unit (Amps)
(column 2)
21 lighting 3A 3+2 5.0
A (i)
points
12 double 10 A (1st 20) 10 + 5 15.0
outlets 5 A (next 20)
B (i)
(equivalent 24
sockets)
15 single-phase 10 A None 10.0
B (ii)
outlets
50% (6000 / 240) x 12.5
C Oven rating
(or x 0.5) 0.5
E Instantaneous 33.3 % (2400 / 240) x 3.33
HWS (or x 0.33) 0.33
Total demand current = 45.83 A
9. Load Description Current Calculation Demand
Group of load allowance current
(column 1) (given list) per unit (Amps)
(column 2)
21 lighting 3A 3+2 5.0
A (i)
points
12 double 10 A (1st 20) 10 + 5 15.0
outlets 5 A (next 20)
B (i)
(equivalent 24
sockets)
15 single-phase 10 A None 10.0
B (ii)
outlets
50% (6000 / 240) x 12.5
C Oven rating
(or x 0.5) 0.5
E Instantaneous 33.3 % (2400 / 240) x 3.33
HWS (or x 0.33) 0.33
Total demand current = 45.83 A
10. Load Description Current Calculation Demand
Group of load allowance current
(column 1) (given list) per unit (Amps)
(column 2)
21 lighting 3A 3+2 5.0
A (i)
points
12 double 10 A (1st 20) 10 + 5 15.0
outlets 5 A (next 20)
B (i)
(equivalent 24
sockets)
15 single-phase 10 A None 10.0
B (ii)
outlets
50% (6000 / 240) x 12.5
C Oven rating
(or x 0.5) 0.5
E Instantaneous 33.3 % (2400 / 240) x 3.33
HWS (or x 0.33) 0.33
Total demand current = 45.83 A
11. Load Description Current Calculation Demand
Group of load allowance current
(column 1) (given list) per unit (Amps)
(column 2)
21 lighting 3A 3+2 5.0
A (i)
points
12 double 10 A (1st 20) 10 + 5 15.0
outlets 5 A (next 20)
B (i)
(equivalent 24
sockets)
15 single-phase 10 A None 10.0
B (ii)
outlets
50% (6000 / 240) x 12.5
C Oven rating
(or x 0.5) 0.5
E Instantaneous 33.3 % (2400 / 240) x 3.33
HWS (or x 0.33) 0.33
Total demand current = 45.83 A
12. Load Description Current Calculation Demand
Group of load allowance current
(column 1) (given list) per unit (Amps)
(column 2)
21 lighting 3A 3+2 5.0
A (i)
points
12 double 10 A (1st 20) 10 + 5 15.0
outlets 5 A (next 20)
B (i)
(equivalent 24
sockets)
15 single-phase 10 A None 10.0
B (ii)
outlets
50% (6000 / 240) x 12.5
C Oven rating
(or x 0.5) 0.5
E Instantaneous 33.3 % (2400 / 240) x 3.33
HWS (or x 0.33) 0.33
Total demand current = 45.83 A
13. Load Description Current Calculation Demand
Group of load allowance current
(column 1) (given list) per unit (Amps)
(column 2)
21 lighting 3A 3+2 5.0
A (i)
points
12 double 10 A (1st 20) 10 + 5 15.0
outlets 5 A (next 20)
B (i)
(equivalent 24
sockets)
15 single-phase 10 A None 10.0
B (ii)
outlets
50% (6000 / 240) x 12.5
C Oven rating
(or x 0.5) 0.5
E Instantaneous 33.3 % (2400 / 240) x 3.33
HWS (or x 0.33) 0.33
Total demand current = 45.83 A
14. Load Description Current Calculation Demand
Group of load allowance current
(column 1) (given list) per unit (Amps)
(column 2)
21 lighting 3A 3+2 5.0
A (i)
points
12 double 10 A (1st 20) 10 + 5 15.0
outlets 5 A (next 20)
B (i)
(equivalent 24
sockets)
15 single-phase 10 A None 10.0
B (ii)
outlets
50% (6000 / 240) x 12.5
C Oven rating
(or x 0.5) 0.5
E Instantaneous 33.3 % (2400 / 240) x 3.33
HWS (or x 0.33) 0.33
Total demand current = 45.83 A