Welcome to this CableCALC Pro demonstration of a maximum demand calculation from ElectroTECHnik, www.elek.com.au. This maximum demand demonstration is based on example 2 of appendix c from the wiring rules AS3000 2007. This is the maximum demand environment which can be accessed from within CableCALC Pro. The first step is to choose the type of installation. In this example, It’s a single domestic installation with a 3 phase voltage of 400 volts so we can move straight on to adding our loads by going to the controls tab and we’ll add our first load.
Our first load are some loading points. We add our description first and then we selected our load group, that’s load group A. indoor loading, single phase, 60 watts per fitting, total of 26 light fittings and we will place all 26 according to the Australian standard example onto the blue phase. We’ll add our next load. Give it a description. It could be anything. It’s going to have sockets. Load group B, the center equal to 10 amps, single phase, rated at 10 amps each. We’ve got a total of 24. We will place 15 onto the white, 9 onto the blue.
We could apply custom diversity factors but in this example, we’ll use the automatic selection. At our next load, it’s a single 15 amp socket, load group B, 15 amps, single phase. Of course, it’s rated at 15 amps, there’s only one and they want us to place it onto the red phase. Next load is some hot plates. Logical description, load group C, single phase, rated at 5000 watts each. Two of them, one on the red, one on the white phase at our next load.
And it’s an oven. Load group C again. Single phase, individual oven rated at 6600 watts. We’ll place it onto the blue phase. Next load is some air conditioning, single air conditioner, aircon, load group D. It’s a single phase unit rated at 4000 watts. There’s only one and it’s on the red phase. The second to the last load is a water heater. It’s an instant water heater, load group E. It’s three phase, rated at 12960 watts. There’s only one evenly distributed over all the phases. Our final load is a clothes dryer. According to the Australian standards, that falls under load group C. We can see there, laundry equipment, single phase 3600 watts. There’s only one and it’s on the white phase.
Now, we’ve entered all our loads. We could at any stage go through and change any of these parameters. But I think we’re happy with that and we’ll go ahead and calculate. We’re prompted to always check our after diversity currents that they’re reasonable and there we have it, the results, all our loads ordered according to load groups. There will be four diversity currents, -- phase and their after diversity currents and we have a summary over here. After diversity current, it’s probably what we’re most interested in. The maximum of these we’ll use to determine our cable size from within CableCALC and it’s as simple as that. This is where we will end the demonstration, thank you very much for watching.
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