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Load calculator

Single Phase Connections

For any enquiry with a load requirement of less than 80amps, a single phase connection will be provided.

For a single phase, non-electrically heated domestic dwelling with fewer than five bedrooms and no disturbing loads, we will provide an 80amp single phase supply capable of providing up to 18kVA. This will be adequate for all normal lighting and household appliances that work off sockets.

For a single, electrically heated domestic dwelling with fewer than five bedrooms and no disturbing loads, we can provide a 100 amp single phase supply capable of providing up to 23kVA. This will be adequate for all normal lighting and household appliances that work off sockets.

Three Phase Connections

If you require assistance calculating your three phase load requirements, please use the calculator below.

Please be aware that this will give an indication only and will not take into account any diversity that could be applied. If diversity isn’t applied, then you may be requesting and paying for a much larger supply than you actually need.

Adding up the various plant/appliances to be used, will not take into account diversity.

For a more accurate load calculation we advise you to speak to an electrician or electrical contractor. They will advise you on the load requirements based on your usage taking diversity into account.

Load guideline summary

80 amp single phase supply can provide up to 18 kVA
100 amp 3 phase supply can provide up to 70 kVA
CT metering can provide a max load of 275 kVA at low voltage
A supply in excess of 276 kVA Needs a high voltage solution

Three phase loads based on normal running voltage of 415 volts

Amps per phase kVA Amps per phase kVA
20 14 230 165
30 22 240 173
40 29 250 180
50 36 260 187
60 43 270 194
70 50 280 201
80 58 290 208
90 65 300 216
100 72 310 223
110 79 320 230
120 86 330 237
130 93 340 244
140 101 350 252
150 108 360 259
160 115 370 266
170 122 380 273
180 129 390 280
190 137 400 288
200 144 410 295
210 151 420 302
220 158

To help you work out your own load requirements use our online calculation tool.


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