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10/9/2024 at 12:33pm
Location: London
Outfit: Lunar Cosmos 524
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Oft overlooked, but a parallel constraint to EHU rating for electrical appliances in caravans/MHs. Your '13A' domestic type power sockets in a caravan/MH are usually really only max 10A (2.4kW) power sockets because they are protected by a 10A circuit breaker on the electric supply panel! So a single or combination of plugged in appliances SHOULD not exceed 2.4kW!
A 16A EHU is totally academic in terms of what max power appliance you can run, it'll be 10A anyway! BUT, it makes a difference to what ELSE you can run at the same time as a high powered appliance! A 10A EHU would only supply say a 2.4kW air fryer and nothing else!
There are a number of things normally 'running in the background' drawing power from the EHU as well. The battery charger, fridge, and although nominally 12v devices, things like lights, pumps, heating/cooling fans, TV etc., are adding a load to the EHU as well, as powered by a 240-12v power converter, so cannot be overlooked. The exact load is difficult to state definitively, as quite a few variables at play, like the fridge is on a thermostat, so will not draw max load all the time, and the battery charger again will draw different loads depending on state of charge of the battery. Allowing 0.5kW (2A) should cover most of those loads.
Of course, electric heating, water heaters, microwaves, electric hob on the stove etc. are high demand items and generally should NOT be used at same time as something like an Air Fryer, at least not until you've done some sums to ensure your accumulative power demands don't exceed the caravan/MH and/or EHU capabilities. Just to complicate things further, some appliances like Microwaves have huge surge demands far in excess of the stated running power, so can be problematic if running in combination with other high demand loads! Also the power rating on the front, say 700W, is the OUTPUT cooking power, the power drawn from the supply will be more like 1.2kW with the surges on top of that!
Plenty of Air Fryers around that are rated at a more reasonable 1.5/1.7kW. A 2.4kW rated one in a caravan/MH is too close to supply limits, and you risk, tripping breakers, or having to be near paranoid about what else is running at the same time!
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10/9/2024 at 3:58pm
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on a 10A supply with a 2kw load you have still got 3A at least without risking tripping the breaker.
saxo1
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11/9/2024 at 9:56am
Location: Worcestershire
Outfit: Buccaneer Cruiser
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We have no issue using our Ninja or our George Foreman in the caravan. We have used both together, but different sockets. I doubt very much if the sockets are rated at 10amp?
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11/9/2024 at 11:31am
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Each individual socket is rated at 13A.
saxo1
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11/9/2024 at 12:07pm
Location: London
Outfit: Lunar Cosmos 524
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Quote: Originally posted by iank01 on 11/9/2024
....... I doubt very much if the sockets are rated at 10amp?
The sockets themselves WILL be rated at 13A, BUT the circuit breaker that protects the mains outlets (a single breaker covering multiple sockets on my caravan) is usually only 10A rated, therefore you can't reliable load a socket OR COMBINATION of sockets with more than 10A/2.4kW!
The circuit breakers usually have a bit of latitude on their rating, so can tolerate a limited overload without tripping.
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11/9/2024 at 12:30pm
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MCBs are rated at 30 deg C they will carry slightly more at lower temperatures and slightly less a higher temperatures.
They are designed to continuously carry 1.13X their rating so a 10A trip should not trip at 11.3A and can carry considerably more, up to 1.45X its rating for up to !hour when it must trip,
saxo1
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Topic: Air fryer
via mobile 10/9/2024 at 10:48am
