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| Is this Wiring Legal? (NSW) |
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| james_s:
--- Quote from: SparkyFX on December 05, 2020, 02:10:31 pm ---Check the label closely. It is rated 3kW because it is pumping this amount of heat out of the heat exchanger (into ambient air). Electrically it is rated at 9 Amps. Would not worry. --- End quote --- That probably makes more sense than the units we use here, our refrigeration is still rated in tons, which was the amount of ice it could produce in some unit of time. It's around 12,000 btu per ton IIRC. |
| VK3DRB:
Don't bother with a sparky. Get a copy of AS3000 and you will have the answer in there. Numbskulls in the Australian government hosted a copy of the standard a couple of years ago online, available for free to every man and his dog. |
| WattsThat:
--- Quote from: james_s on December 05, 2020, 08:24:23 pm --- That probably makes more sense than the units we use here, our refrigeration is still rated in tons, which was the amount of ice it could produce in some unit of time. It's around 12,000 btu per ton IIRC. --- End quote --- Yes, it is 12K BTU’s but the unit of one ton of refrigeration is the energy required to melt 2000 pounds of ice at 0C in 24 hours. It came about when replacing natural ice for cooling with mechanical refrigeration. Just another one of those arcane US units that we cannot rid ourself of. |
| aargee:
We had two 4.3kW systems installed many years ago and each had its own circuit with CB at the fuse box and a isolation switch at the outdoor compressor unit. (QLD but the standards are national I think) |
| Vovk_Z:
I think single isolation wires are not a large problem. Dave can isolate them with an isolating tape, for example, to feel safer. The main concern for me is how safe the electrical connection is made. The main rules are about that (because of fire hazard). If there isn't a dedicated electrical design project for this wiring then we can't complain about the absence of an individual circuit breaker for each aircon. |
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