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Subject Topic: What can I use on a 6amp hookup? Post Reply Post New Topic
Personmacstyle
05/9/2015 at 10:14pm
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I have never used a 6 amp hook up before, booked a site for next week in Wales, it is cheap but only has 6amp. I can run my fridge and heating/hot water/fire from gas, and have a 12 volt electric kettle, I may get a stove top kettle for the gas oven if that would be better. The only item I use that I need as I work while I travel is my Mac Book, which is 2.5amp and 250 watt. Would this work fine with it being 250W?
Also have a TV that uses 20W when on, not sure how many amps, but is a 20" LCD TV.


PersonBob61
05/9/2015 at 10:44pm
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If you check out this page you will find a watts to amps conversion chart. If the campsite electricity supply is 6 amps you can use appliances up to a total of about 1350 watts. You can use more than one appliance providing the total does not exceed 1350 watts.

To work it out you divide the watts by 230 volts. So 1350w divided by 230v = 5.86 amps.

As you can see 250 watts is 250 divided by 230 = 1.08 amps. 20 watts is only 0.08 amps so if you use them both together you will only be using 1.16 amps.


Post last edited on 05/09/2015 22:50:22


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PersonAVON EAGLE
06/9/2015 at 9:25am
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You can convert amps to watts volts to amps etc by using this simple mathmatical method. (The wave method)

            W
          -----
          A   Ve

Where W is watts - A is amps and Ve is volts.

If you know the wattage and the volts then A = W / V
Conversely - W = A x V and V = W / A

Simples...     


PersonG7ACU
06/9/2015 at 10:41am
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Quote: Originally posted by macstyle on 05/9/2015
... is my Mac Book, which is 2.5amp and 250 watt. Would this work fine with it being 250W?

Double check your figures as my sons MacBook uses an 85w power supply/charger, which is about the largest laptop charger Apple produce

-------------
Paul

Every day's a school day!


PersonSGThomas
06/9/2015 at 11:55am
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On 6 amp supplies we run 3way fridge, kettle, lighting and chargers/computers comfortably and with no problem.

If you have appliances like microwaves or ovens, make sure that other appliances are switched off before using.

The killers are hairstraighteners and or hairdryers!

If you are paying for ehu, why use your own gas?


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Persontrog100
07/9/2015 at 9:13am
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6 amps is roughly 1400 watts..

about half of a normal house supply.. this will run most things that are not "heaters" without problems..


trog


Personnavver
09/9/2015 at 8:34pm
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I'm afraid watts divide by volts is only true for DC (direct current) equipment. For AC (alternating current) there is a thing called power factor.

So watts divide by volts divide by power factor is the true formula to use.

Power factor is the cosine of the angle between the voltage and the current. In AC circuits, voltage and current are continually varying but current can vary before or after the voltage.

Think of a horse pulling a barge on the canal. The rope is not in line with the barge so the horse must pull a little harder than if it were directly in front of the barge.

Power Factor will be a maximum of 1 and this will be true for resistive loads such as kettles, heaters etc. It may be less than 1 for inductive loads such as transformers (battery chargers), motors, older fluorescent lights and very likely laptop chargers etc.

I only mention this because it may explain why some equipment seems to cause problems when the watts divide by volts calculation says it shouldn't.


PersonBob61
10/9/2015 at 8:38pm
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I don't think many of us have swallowed an electricians manual so we need something basic and simple to work out what we can and can't use on a campsite. For all the years that I have been using EHU the table displayed on this page of UKCS has been used to give people a pretty accurate idea of what they can or cannot use on a campsite. The figures on that table have been worked out from Watts divided by 230 volts and by following those figures and sticking within 10 amps total I have never had a problem with my equipment.

In my experience, the majority of electrical trips on a campsite are caused by campers being unaware of the limitations and trying to run too many electrical items at the same time or items which are too highly powered for the campsite supply.



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