[tjb]

Right now I have 2 Computers and a TV on one breaker. I have 2 lcd monitors, One CRT monitor, 2 computers, Speakers, Router, modem, 2-3 lights, TV, vcr, DirectTv Receiver, and A Small fish tank. All I want to add is a computer and monitor. One of the computers is on a UPS and the other is on a surge protector. Would this hurt any thing?

[brooksy]

You have got all that on a circuit breaker, and ou want to add more stuff?

[tjb]

That was My plan. May Get rid of the tv and use a tv tuner

[lexmarks567]

Originally Posted by tjb

That was My plan. May Get rid of the tv and use a tv tuner

is this a 20amp or 15 amp. I say your overloading it. Might want to get another circuit.

[kiwiguy]

Originally Posted by tjb

Right now I have 2 Computers and a TV on one breaker. I have 2 lcd monitors, One CRT monitor, 2 computers, Speakers, Router, modem, 2-3 lights, TV, vcr, DirectTv Receiver, and A Small fish tank. All I want to add is a computer and monitor. One of the computers is on a UPS and the other is on a surge protector. Would this hurt any thing?

Assuming you have a 20 amp breaker and 110v AC (we have 230v here)

That is 110 x 20 = 2,200 watts

Computers have an average draw of ~ 140 watts each = 280 Watts
LCD monitors about 70 Watts each = 140 watts
CRT monitor about 120 Watts = 120 watts
Modem, speakers and 2 or 3 lights would total about 200 watts
Small fish tank pump only would be about 10 watts

So the total is about 750 watts so far, but you give zilch in the way of accurate info as to lights (2 or 3 lights) could be anything. Same for the fish tank, is it heated?

So it appears as though you are not even halfway towards the breaker rating (if we knew that rating it would help as well!)

[tjb]

Originally Posted by kiwiguy

Assuming you have a 20 amp breaker and 110v AC (we have 230v here)

That is 110 x 20 = 2,200 watts

Computers have an average draw of ~ 140 watts each = 280 Watts
LCD monitors about 70 Watts each = 140 watts
CRT monitor about 120 Watts = 120 watts
Modem, speakers and 2 or 3 lights would total about 200 watts
Small fish tank pump only would be about 10 watts

So the total is about 750 watts so far, but you give zilch in the way of accurate info as to lights (2 or 3 lights) could be anything. Same for the fish tank, is it heated?

Nope it is not heated just a pump

Originally Posted by kiwiguy

So it appears as though you are not even halfway towards the breaker rating (if we knew that rating it would help as well!)

I am Pretty sure it is a 15

I may just add a second monitor to the other comptuer

[kiwiguy]

At 15 amps you are still only halfway to the rating, roughly speaking.

Add up the total Watts and divide by the Voltage (110?)
That gives the Amps.

[justfoo]

Actually, in Canada ( and I'm pretty sure US is similar ) Electrical code law states that you have to derate the circuit breaker to 80% which means you have 12 amps to work with which equals 1440 watts. Just in case you're considering changing up to a 20 amp CB know that your wiring is probably #14 awg which is only rated to 15 amps and so upping to a 20 is not really an option (If you go over your wires rating it will heat up).
These limits are set in place for the very real reason that properties burn down all too often from overloaded electrical circuits.
If in any doubt at all please consider having another circuit installed.
Please keep this in mind with your planning tjb.
Also keep an eye on what you are using to do all this "splitting" powerbars? octopus plugs? poor connections to these devices are often the cause of overheating and fire so take a close look at what you've got. I've seen a cheapie powerbar with an alluminum case which burned a wall and fried the pc's attached to it.
Good luck tjb.

[tjb]

I don't plan on changing the breaker or adding one. All three computers and tv are hooked up to four different outlets. Each has a power strip except the main computer has a UPS. I plan On getting another LCD to replace one of the CRT monitors. This should save some energy. I might get a KVM switch. I unhook all the extra TV equipment that i don't use.