Topic: power bills (Read 1110 times)

Been there done that 

Not to mention the weight of the 10-3 so cord pulling it out by itself

A correction on outlet (or technically branch circuit) limits.

In the US the nominal voltage is actually 120V (or 240V) not 110V however the NEC for fire safety derates continual loads (like a miner running 24/7) to 80% of circuit peak capacity.

So for continual loads the usable wattage by outlet type:
NEMA 5-15 120V 15A 120*15*0.8 = 1440W "normal outlet"
NEMA 5-20 120V 20A 120*20*0.8 = 1920W
NEMA 6-15 240V 15A 240*15*0.8 = 2880W
NEMA 6-20 240V 15A 240*20*0.8 = 3840W
NEMA 6-30 240V 15A 240*30*0.8 = 5760W

Yeah I have a pair of NEMA L6-30R outlets I installed myself but then again I am kinda crazy.   Unless you have strong confidence in your electrical skill I would recommend having a qualified electrician do the work.   It isn't rocket science but electricity can kill ... the very first time.  

Still nothing like having 11.5 KW of juice for miners.  The power cable on the 30A PDU (high current power strip) is about 1/2" thick.  You could probably secure a boat to a dock with it.    The "L" just means locking connectors, same power rating but once you insert the plug you rotate it to lock it into place.  This makes it a little safer when dealing with high current, no chance of creating an arc flash by tripping over the cord and ripping it out of the socket while under load.

ok thanks for info, seems i should be able to still run one without lossing profit

It's really simple, figure out how many watts the hardware you want uses. Multiply times .001 to get kWh. Next, multiply your electricity rate. $0.10/kWh seems typical for the US. Finally multiply times 24, than times 30.

So, a 10GH blade uses 100W. 100W*0.001=0.1kWh

0.1 kWh* $0.10= $0.01 USD/hr cost

*24hr = $0.25/day
*30 days = $7.50/mo power costs.

Now, a quad 7970/280x litecoin rig

250W TDP/card + ~25-50W OC/heat overhead.
~100W system overhead
~80% PSU efficiancy

275x4= 1100W + 100W = 1200W after PSU conversion.

Multiply in power supply losses - 1200W * 1.2 = 1440W, or about the limit of a 110V 15A home circuit (110V*15A=1650W) room for a fan and monitor  

1440W * .001 * .1 * 24 * 30 = $105 USD/mo electric costs

Hope that helps a bit.

I ran 13 7970's for a month. My power is .06 a kilowatt (Canada)

one month bill was just over $1000, was worth it at the time but man was my basement ever hot!!

Hello, more info need for me on power bills for different systems, and furture systems

first thing i am in the usa, with normal sockets to plug in, will i need anything else?

i would like to know what hashrate and your avg power bill is for your systems, and if anyone knows i would like to know the aprox, power requirments of the new systems coming out, like the 2 th/s and 3 th/s ones, are they standard plugs? and what do you think it will cost to run them a month?

thanks for any help