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10amp and 13 amp what is the difference?


keithh Plus
11 23.7k 33 Wallis And Futuna
27 Jun 2013 12:24PM
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Lucian 5 562
27 Jun 2013 1:01PM
So if my sockets in the wall are 13amp and the fuses in my lights are 13 amp is it ok to use a 10 amp extension lead?
thewilliam 6 5.1k
27 Jun 2013 4:49PM

Quote:So if my sockets in the wall are 13amp and the fuses in my lights are 13 amp is it ok to use a 10 amp extension lead?


A chain is as strong as its weakest link and this weakest link has to be strong enough to support the load.

Look at the rating plate on your lights and add up the current ratings for all the lamps that you intend to use. You can calculate current by dividing wattage by 230 if no figure for amperage or current. Add up the current rating for all the lights that you intend to plug into the wall socket and use an extension cable with an equal or higher rating.

If you work out the total to more than 13 Amps, you'll need to use fewer lighting units.
Niknut Plus
5 938 64 United Kingdom
27 Jun 2013 4:56PM
The formula is simple..........Amps X Volts = Watts !!

So 13a X 240v = 3000 w (rounded off) (so 3KW !!)

Use an extension lead with 10a fuse......10a X 240v = 2400w (2.4Kw)......add up all the Wattage values of your equipment
& don't exceed 2400w.........easy peasy !!!!!.Smile

Hope that helps........
thewilliam 6 5.1k
27 Jun 2013 6:27PM

Quote:The formula is simple..........Amps X Volts = Watts !!

So 13a X 240v = 3000 w (rounded off) (so 3KW !!)

Use an extension lead with 10a fuse......10a X 240v = 2400w (2.4Kw)......add up all the Wattage values of your equipment
& don't exceed 2400w.........easy peasy !!!!!.Smile

Hope that helps........



Your calculations are correct but here in the UK, we've had a 230 Volt supply for some decades now.
27 Jun 2013 7:10PM

Quote:Your calculations are correct but here in the UK, we've had a 230 Volt supply for some decades now


Nominally 230V but.... UK/EU Mains Voltage Harmonisation
Niknut Plus
5 938 64 United Kingdom
27 Jun 2013 7:31PM
Just run my Voltmeter across the mains in my house....& it's showing a steady 239volts......that's close enough for me, I'm
not gonna worry over 0.5% loss from 240 !!!!
Lucian 5 562
27 Jun 2013 7:46PM
I have 4 elinchrom dlite heads that I think are 200w each. so that should mean I have enough power? I think. My studio is opening a week on Saturday and I have 3 bookings for that day so I need to ensure I will be ok.
Niknut Plus
5 938 64 United Kingdom
27 Jun 2013 8:10PM
200w equates to less than 1amp.....so 4 of 'em totals 800w....even a 5a fuse will cover it, so 10a is plenty !!

Good luck with your venture !!!!!
thewilliam 6 5.1k
27 Jun 2013 8:26PM

Quote:Just run my Voltmeter across the mains in my house....& it's showing a steady 239volts......that's close enough for me, I'm
not gonna worry over 0.5% loss from 240 !!!!



The EU standard is 230 plus or minus 10%. Our 240V and the German 220V lie within the tolerance. As supply transformers are upgraded or repaired, more areas will have their supply nearer 230V
thewilliam 6 5.1k
27 Jun 2013 8:28PM

Quote:I have 4 elinchrom dlite heads that I think are 200w each. so that should mean I have enough power? I think. My studio is opening a week on Saturday and I have 3 bookings for that day so I need to ensure I will be ok.


Your primary concern should now be the safety of trailing cables. You could gaffer-tape them to the floor so they don't present a trip hazard. And you do have Public Liability insurance?
keithh Plus
11 23.7k 33 Wallis And Futuna
27 Jun 2013 8:51PM
My Hoover is 1000watts, do I heed to convert to a three phase supply before I switch it on?


And before anyone thinks I'm being facetious, we have a thread on the safety aspect of plugging something in that has half the power of my kettle.

William has a more salient point when you consider four d lights on lightweight stands in a broom cupboard.
Lucian 5 562
27 Jun 2013 10:33PM
A broom Cupboard LOL. My studio background is 7ft wide with room for lights at the side and is 4 meters long so not to bad a space. The reason I am needing an extension lead is because the wiring in my studio is about 47 years old because it has never been re-wired since the property was built. It only has 1 double socket in each room including the studio room because it was built at a time where people did not need to run many electrical appliances at the same time.
Paul Morgan 13 16.6k 6 England
27 Jun 2013 11:18PM
Add the stands and lighting and what is left, not a lot.
Lucian 5 562
28 Jun 2013 10:08AM

Quote:Add the stands and lighting and what is left, not a lot.


So ok another couple of meters either way would be good but I am not charging for the sittings so people don't part with any money expecting a huge studio. There is photogrphers going to peoples homes to do shoots in small spaces so I am confident I will get good shots in this space. I have a 5ftx7ft lastolite hilite with lights that go inside. + a mottled grey muslin background that can be attached to the top of the highlight for mid key photography. I have 2 main lights with white shoot through brollys and I also have a 4.5 tog duvet at the floor as I don't like the lastolite train.

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