How City Power can cut off your electricity if you use too much

[Ockie]

24kw...

Meneer, I see that you get instant tankless electric heaters that you just mount on your wall. These it seems you can use a normal electricity supply for. Dont you think these will be cheaper to install than a gas one?

 

[Sinbad]

Meneer, I see that you get instant tankless electric heaters that you just mount on your wall. These it seems you can use a normal electricity supply for. Dont you think these will be cheaper to install than a gas one?

I don't know.
Thing is, 12kw (the limit of a 60A supply) is not going to do a lot of water heating.

Assume you want flow of 10lpm, your incoming water is at 10 degrees and you want a 50 degree shower.
volume in litres x 4 x temperature rise in degrees centigrade / 3412 = kw required for an hour.
40 * 40 /3412 = 0.469 kw to heat in one hour. but you want 10lpm which means you need 60 * .469 = 28KW of power.

 

[Ockie]

I don't know.
Thing is, 12kw (the limit of a 60A supply) is not going to do a lot of water heating.

Assume you want flow of 10lpm, your incoming water is at 10 degrees and you want a 50 degree shower.
volume in litres x 4 x temperature rise in degrees centigrade / 3412 = kw required for an hour.
40 * 40 /3412 = 0.469 kw to heat in one hour. but you want 10lpm which means you need 60 * .469 = 28KW of power.

Oh lordy....why is this so complicated?

I was looking at this as a example. There is a 6kw model that can be used for more than one hot water tap, so then the shower and the kitchen sink.

http://www.water-heating.co.za/

 

[Trevorvds]

Sitting in the dark despite having a smart meter which was sitting at 0.3kw power draw at time of outage so it seems that they can't get that right or drawing 300 watts is above the limit. Our whole street /area has these meters and they are all without power. It Would be great if the implementation actually matched the hype.

 

[supersunbird]

Sitting in the dark despite having a smart meter which was sitting at 0.3kw power draw at time of outage so it seems that they can't get that right or drawing 300 watts is above the limit. Our whole street /area has these meters and they are all without power. It Would be great if the implementation actually matched the hype.

Smart meter wont help if they switch the whole suburb off at the substation...