1. Circuit
Function L1 L2 L3
Number
✔ ➜➜
12 twin 36 W fluorescent lighting
1 Move to L3 ✔
fittings at 0.4 A per fitting
Circuit
12 twin 36 W fluorescent lighting
2 ✔
fittings at 2.2 A per fitting
3 3 Highbay MV light fittings ✔
3 3 Highbay MV light fittings ✔
5 ✔
7 double 10 A outlets
6 7doube10Aoutlets ✔
7 6 double 10 A outlets ✔
8 2 x 15 A single-phase outlet ✔
9 2 x 15 A single-phase outlet ✔
10 15 A three-phase outlet ✔ ✔ ✔
11 15 A three-phase outlet ✔ ✔ ✔
12 Single-phase range ✔
13 Instantaneous water heater ✔
14 -16 4 kW, three-phase motors ✔ ✔ ✔
16 - 19 5.5 kW, three-phase motors ✔ ✔ ✔

2. Circuit
Function L1 L2 L3
Number
✔ ➜➜
12 twin 36 W fluorescent lighting
1 Move to L3 ✔
fittings at 0.4 A per fitting
Circuit
12 twin 36 W fluorescent lighting
2 ✔
fittings at 2.2 A per fitting
3 3 Highbay MV light fittings ✔
3 3 Highbay MV light fittings ✔
5 ✔
7 double 10 A outlets
6 7doube10Aoutlets ✔
7 6 double 10 A outlets ✔
8 2 x 15 A single-phase outlet ✔
9 2 x 15 A single-phase outlet ✔
10 15 A three-phase outlet ✔ ✔ ✔
11 15 A three-phase outlet ✔ ✔ ✔
12 Single-phase range ✔
13 Instantaneous water heater ✔
14 -16 4 kW, three-phase motors ✔ ✔ ✔
16 - 19 5.5 kW, three-phase motors ✔ ✔ ✔

3. Description Current allowance Demand
Circuit Load Group of load per unit Calculation (Amps)
No (column 1) (given list) (column 2) L1 L2 L3
1 12 twin
A 36 W Full connected load 12 X 0.4 = 4.8 ➜➜ 4.8
fluorescent
2 12 twin
A 36 W Full connected load 12 X 0.4 = 4.8 4.8
fluorescent
3 A 3 Highbay MV Full connected load 3 X 2.2 = 6.6 6.6
4 A 3 Highbay MV Full connected load 3 X 2.2 = 6.6 6.6
5 7 double 1000 W for 1st outlet + 750 each additional (1000 + (13 X 750))
B(i) 46.7
10 A outlets = 14 points outlet / 230
7 double
(1000 + (13 X 750))
6 B(i) 10 A outlets 1000 W for 1st + 750 each additional outlet 46.7
/ 230
= 14 points
7 6 double (1000 + (11 X 750))
B(i) 1000 W for 1st + 750 each additional outlet 40.2
10 A outlets = 12 points / 230
8 2 x 15 A single phase
B(iii) outlets 15 + (15 X 0.75) 26.25
Full current rating of highest outlet + 75% (x
9 2 x 15 A single phase 0.75) full current rating of remainder
B(iii) 15 + (15 X 0.75) 26.25
outlets
10 This is the highest rated
B(iii) 15 A three phase outlet 15.0 15.0 15.0
11 B(iii) 15 A three phase outlet 15 x 0.75 11.3 11.3 11.3
12 C Single phase range Full connected load current 6400 / 240 26.7
13 C Instant hot water heater Full connected load current 2400 / 240 10.0
14 D 4 kW three phase motor 8.5 x 0.5 = 4.3 4.3 4.3 4.3
15 D 4 kW three phase motor 8.5 x 0.5 = 4.3 4.3 4.3 4.3
16 D 4 kW three phase motor Full load of highest rated motor + 75% (x 8.5 x 0.5 = 4.3 4.3 4.3 4.3
17 D 5.5 kW three phase motor 0.75) of full load of second highest rated Highest rated motor 11.7 11.7 11.7
18 motor, + 50% of full load of remainder 0.75 x 11.7 = 8.8
D 5.5 kW three phase motor (second highest 8.8 8.8 8.8
rated motor)
19 D 5.5 kW three phase motor 0. 5 x 11.7 = 5.8 5.8 5.8 5.8
Total demand current per phase 139.0 153.25 149.85

4. Using the highest loaded
phase (L2 at 153.25 A)
10% for future additions
= 1.1 x 153.25 = 168.575 A.