Avoid tripping the elec. - Motorhome Forums, Motorhome Discussion, Motorhome Chat

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post #1 of 14 (permalink) Old 16-12-2020, 17:26 Thread Starter
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Avoid tripping the elec.

Copied from the singing daughter post .

Might be an opportunity here to talk about tripping your elec on eg French campsites/aires.. ie you are on a site which states 6amps max , on 220 volts ,what appliances can you use . the formula for this would be Watts divided by Volts = Amps , but that can be too complicated to work out in your head so I just multiply the watts by 4 ( divide by 1000) and add a half amp for good measure.

So eg the kettle is 600watts , the microwave is 800 watts , together they are 1400 watts , what amps ?

1400 x 4 = 5.6 and add half an amp so 6.1 amps So no for a 6 amp site but ok for a 10amp.

Also some appliances use more elec when starting up that when running so leave a margin for this as well ( things with elec motors mainly)

Well that's my way , I stand to be corrected.

G
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post #2 of 14 (permalink) Old 16-12-2020, 18:04
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Basically yes Alan.
If you think for each kw it's 5 amps you will be on the safe side. 13a was created to handle 3kw appliances. So there is a margin of error or known in the trade as 'Coefficient of Utilisation'.

Ray.
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post #3 of 14 (permalink) Old 16-12-2020, 18:57
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Just keep plugging stuff in until something trips. Then you will know. I generally find on a 6amp connection you will get away with boiling a kettle but not having an electric heater going at the same time. I tell Michelle to knock off the heater if she is boiling a kettle but of course she will forget so I have to go out and sort it


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post #4 of 14 (permalink) Old 16-12-2020, 20:06
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Just keep plugging stuff in until something trips. Then you will know. I generally find on a 6amp connection you will get away with boiling a kettle but not having an electric heater going at the same time. I tell Michelle to knock off the heater if she is boiling a kettle but of course she will forget so I have to go out and sort it



Pull the fuses on all but one 13A socket then she has to unplug one appliance to use the other - simples.
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post #5 of 14 (permalink) Old 16-12-2020, 22:24
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Being a Physics teacher means that I have no problem working out the current drawn by different appliances.

UNFORTUNATELY, one very cold and wet night at Les Anderleys campsite I switched the electric heater up to 2kW at the same time as my wife decided to make a "good night" cup of hot chocolate: poof!

It was an embarrassing discussion with the site manager next morning but thank goodness that no-one else was on the same circuit.

Gordon
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post #6 of 14 (permalink) Old 16-12-2020, 22:53
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They must get used to it Gordon.
We found plugging in our RVs was a hit and miss affair due to the quite heavy surge of the transformer. It would trip out a 10a supply even though it was only powering a charger.

Ray.

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post #7 of 14 (permalink) Old 16-12-2020, 23:55
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I printed and laminated copies of a reminder card I created, showing the values of typical site supplies and for our van appliances. I stuck those up by the sockets in the van, makes it easy to quickly tot up when more than one appliance is in use and also acts as a reminder when one needs unplugging before turning on another one.
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post #8 of 14 (permalink) Old 17-12-2020, 13:49 Thread Starter
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Wow , rogerblack , it was the lots of advice from him and others like him that made me join MHF in the first place . Good to see he is still around.
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post #9 of 14 (permalink) Old 17-12-2020, 22:36
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Wow , rogerblack , it was the lots of advice from him and others like him that made me join MHF in the first place . Good to see he is still around.

Agreed, Welcome back Roger.


Excuses for abscence?


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post #10 of 14 (permalink) Old 17-12-2020, 22:43
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Thanks for that Roger (and nice to see you again).

Is the Water heater the one integrated into the Truma boiler? And are the figures for the Truma heater 3 different settings? I know mine has Eco and....

I don't know - I'm that mean I never look beyond Eco!

Jean
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