Anyone here good with electrics?

AcidHell2 said:
Put it this way a laptop is about 19V at 4.2 amps.
19" lcd is 1.4 amps

why the hell do they cost so much? what is it connected to?
It can't just be a socket. Or is that a generator and they are giving the socket ratings?

Look on the back of your equipment, as long as it isn't ancient it should have voltage input and max amps.
Click to expand...

Acidhell, i am genuinely confused here, as you seem like a generally knowledgeable guy - do you have ANY understanding of electrics at all?

A laptop @ 19.2v/4.2A is 80W, even a 42" plasma screen i would expect to only use around 250W (approx 1A at mains voltage)

That 500w supply will be a little short but if the LCD's are small then i'd think it would suffice.
 
Dr.EM said:
Your almost certainly looking at the output current, ie once the voltage has been dropped to something like 19v or 12v. The input current at 230v will be far lower since power is voltage x current and the SMPS's those devices use are relatively efficient. The laptop supply will have an input current around 0.6A for 230v.

The 500W is roughly 230v x 2A, its actually 460W but no doubt will take 500W if it says so. How big are the LCD TV's? They likely won't use more than 50W each, it will say on the back (even big old CRTs only use about 100W). The Wii uses very little. You should be fine to be honest but check the ratings and add up the watts to be sure!
Click to expand...
Actually come to think of it I have:

1x 26" LCD
1x 32" LCD
1x Laptop
4x Spotlights
1x Wii
All standard 3-pin stuff.

They are a right bunch of con merchants :(
 
Oh and,
This list indicates individual items that can be used with each socket. The use of more than one item
with one socket is not acceptable. At most exhibition venues the use of extension cables and sockets
is not allowed or is restricted.
Click to expand...

You can ***** right off.
 
AcidHell2 said:
Jez said:
[snip/QUOTE]

I know some electronics but as someone pointed out I was looking at the out put and not the input stuff.
Click to expand...

The wattage will be pretty damn similar. As thats what transformers are for, you will lose a little power due to heat though. Most transformers or power unit should tell you their peak values.

Your screwed if its only one item per plug though, get a bigger TV with Picture and Picture :p
Click to expand...
 
Just add up all the peak wattage values and divide by 230V (safety margin as thats the lower UK voltage) that will give you your current draw.

Power = voltage x current (amps)
 
If it is a transformer it will have specified input voltage and current. From this you can work out the wattage by multiplying them together. So assuming you need 8 sockets, 1 for each appliance, you will need to work out the wattage and current for each one, then pay for the appropriate sockets. I'm sorry to say it, but it sounds like it's going to cost quite a lot, which is obviously why they do it this way.
 
What is the average UK price for a kilowatt/hour? I'm not sure but I can tell you my quarterly leccy bill is of the order of £160. So £79 quid for an evenings exhibition, bloody hell that is some markup.
 
jr1104 said:
If it is a transformer it will have specified input voltage and current. From this you can work out the wattage by multiplying them together. So assuming you need 8 sockets, 1 for each appliance, you will need to work out the wattage and current for each one, then pay for the appropriate sockets. I'm sorry to say it, but it sounds like it's going to cost quite a lot, which is obviously why they do it this way.
Click to expand...

It sounds like its one item per socket so you dont need to do any significant maths really.

2amps is what a typical security floodlight draws.... and people are saying you couldn't run a TV off it :D
 
Bubo said:
What is the average UK price for a kilowatt/hour? I'm not sure but I can tell you my quarterly leccy bill is of the order of £160. So £79 quid for an evenings exhibition, bloody hell that is some markup.
Click to expand...
1 KWH is one unit on your bill, so about 15p
 
Jonnycoupe said:
It sounds like its one item per socket so you dont need to do any significant maths really.

2amps is what a typical security floodlight draws.... and people are saying you couldn't run a TV off it :D
Click to expand...

Multiplying isn't significant maths;):D. What I'm saying is if he can only have 1 item per socket, he needs to check things like the Wii and stuff, to make sure he doesn't just get a load of 2 amp sockets, then find he can't run some of his stuff.
 
You must log in or register to reply here.
Back
Top Bottom