We help IT Professionals succeed at work.

# power

on
261 Views
How much power is too much power to be pulling out of an outlet? I have 3 power strips strung together and according to my power meter I'm pulling about 525 watts when my PC and all my monitors are on. When I have all my hard drives plugged in I think I pull 700 or 800 watts, but I haven't plugged them all in at once in a long time.

I'm just wondering how much is too much. At what point is it a fire danger?
Comment
Watch Question

## View Solution Only

Commented:
This one is on us!
(Get your first solution completely free - no credit card required)

Commented:
in electricity, I=VR
this says that current (amps) is equal to voltage * resistance (ohms)
also, P=VI
this says that Power (watts) is equal to voltage * current (amps)

given you are using 525 watts at 120 V, we can calculate how many amps you are drawing

525 = 120 * I
525/120 = 4.37
I = 4.37

you are drawing approximately 4-5 amps, which shouldn't be a big deal, especially since you are most likely on a 15 or 20 amp circuit....however, other recepticles and/or lights could also be on the same circuit, so these would need to be taken into account as well.

I've seen vacuum cleaners that draw as much as 12 amps (obviously they are drawing this from one recepticle, which is a 120 v recepticle)
so P=VI
P=120*12
P=1440 watts

as you can see, a powerful vacuum cleaner draws more amps and uses more watts off a single recepticle than your computer setup.

that's my take on it, although I'm a novice in this field.  I'd love to hear some comments from people with more experience in the field.
jeff

Commented:
15 amps X 120 volts = 1800 watts

Commented:
I seem to be drawing "only" about 6.5 amps right now, so I guess I must be safe then. There's only one circuit breaker switch for this room, so I assume that means that all the wall plugs in this room are on the same circuit So, I wouldn't have a practical option for plugging into a separate circuit anyway.

Commented:
opps . . tfjeff's post was not there when I posted . . Depending on what wlse is on the same run, I think you got plenty of room on one plug

Commented:
simpswr, cheers
everyone else, please chime in if this stuff isn't right...because I've only been in the electrical field about 6 months and I'd love to hear everyone's input.
jeff

Commented:
mus' be right . . you got the points!

well done!

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

###### Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

Deciding to stick with EE.

Mohamed Asif

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
###### Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Connect with Certified Experts to gain insight and support on specific technology challenges including:

• Troubleshooting
• Research
• Professional Opinions
Unlock the solution to this question.

Experts Exchange is the only place where you can interact directly with leading experts in the technology field. Become a member today and access the collective knowledge of thousands of technology experts.