Easy Guide to Maximum Demand & Diversity 

I have watch to the end. Hope that helps.

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Good question! As these devices are on at night typically, and when they turn on they will likely be on for a period until warm and their own thermostat turns them off. As the OSG says it is impossible to calculate Max Demand. Have you got a smart meter this will show your max demand (it would be interesting). Without further information you could use the OSG recommendations for heating devices, but these heaters will be on when most other things are turned off. Sorry it is not really a right or wrong answer for you. In summary as a calculation you may need two max demands one for day time and one for night time. Hope that helps a little probably raises more question and answers - welcome to being an electrician. Please Like, Share & Subscribe.

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Thank you, I have used in my example 36A as the design current, these figures are for my design to show how to do it (it is not based on 9.5kW shower - if this is what you have then base your calculations on 41A). The 40A is the protective device size, this is not the design current (current drawn by the load) of the load. So to sum up diversity is based on design current, not protective device sizes. Hope that helps. Please Share with like minded people or maybe even like and suscribe.

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I'd say normally part of the cooker, but if that is all you have the first 10A is covered - You will have to use your engineering knowledge and experience from the user for it's use. It will have a thermostat in so when on, it will not call for heat all of the time. As the On-site -Guide and I do say this is not an exact science. Just have your reasoning available as to why you have chosen as you have - all anybody can do is say that is not correct - but they would not know themselves until it is installed and you monitor the load over a period of time. - wow that was a longer response than I expected. Good luck - Please Like, Share & Subscribe.

You need to know the length of the run what cable your using you need to know all the correction factors and then you can work out volt drop .

Hi You are quite correct the actual answer is 24A - 38A - 10 = 28. 50% of 28 = 14. therefore 10+14 =24A. school boy error... Thankyou for letting me know. Please like Share & subscribe.

@@sparkyhelp3997 thanks i was having a meltdown trying to figure it out, thank you for the great video!