110v or 220v

[edwinn]

i can use 110 or220v 2 250w which is cheaper to run

thx

edwin

 

[DaveMorris]

Ultimately they will use the same amount of energy. 220v is more efficient in most cases, but I don't think you will save any money doing it that way. Also, most devices built for 220v will want to see 50hz and not 60hz. Make sure that you check the frequency as well as the voltage.

 

[edwinn]

thx

 

[BeanAnimal]

<a href=showthread.php?s=&postid=15463141#post15463141 target=_blank>Originally posted</a> by DaveMorris
Ultimately they will use the same amount of energy. 220v is more efficient in most cases, but I don't think you will save any money doing it that way.

There is no difference in efficiency. We use 220V and higher because we can use smaller gauge wire for the same amount of power. More voltage = less current = smaller wire for same Watts. The subject is rather complicated when we start talking about wire resistance and internal topology if different devices. But for our purposes, there is simply no difference at all.

Also, most devices built for 220v will want to see 50hz and not 60hz. Make sure that you check the frequency as well as the voltage.

50Hz is the frequency that is used in europe. In the United states we use 60Hz and 240V (220) devices are VERY common, especially in commercial lighting, appliance and motor applications. Your residental electric Range, electric clothes dryer and electric water heater are all 240V appliances, as is your 6HP table saw and air compressor

In the US we have
Single Phase
120V/240V/480V (sometimes refered to as 110V/220v or even 115V/220V) all at 60Hz

Polyphase
120V/240V/480V (And 480V motors are often labeled 440V)
120V/208V 480V/277V all at 60Hz