The circuit breaker is the real money as the wiring is going to be the same
regardless of the voltage (in this case). Single pole GFCI breaker is around
$50 and double pole is around $125


"Terry" wrote in message
...
On Fri, 01 Dec 2006 01:43:09 GMT, "Pop`"
wrote:

glen07 wrote:
I am installing an inground pool. the contractor is doing the basic
wiring bonding etc....The filter and control panel can be wired 220,
but pool guy says 110 is ok. The real electrician says he thinks it
should be 220....case closed in my mind, but he said it could be done
110, but it will reduce my electric bill if it is 220. Does anyone
have an opinion...am I saving pennies or dollars if I go 220....thx

It will NOT make any difference in your electric bill. It's more
expensive
to INSTALL 220 wiring, but if it doesn't matter, I'd stick with 110.
Reasons for not useing 110 would be a very long distance to run wires,
requires too large a ckt breaker, things like that. Oh, and the
contractor
will make a few more bucks on wire and connector overheads. IMO if it
requires 30A or more, I'd go 220, else 110 if it's the much more common 20
amps or 25 amps. 1.0 HP motor? 110 is fine.


220 and 110 will use almost the same power. 220 will be a little more
efficient because there is less voltage drop.

I don't know what the difference in cost from a single pole and a two
pole breaker is but that is really the only downside for using 220 I
would guess around 6$ for the cheap ones.

I vote 220


12 gage wire is 0.001546063 ohms / ft

(2 x 100) ft would be 200*0.001546063 = .31 ohms

If a 110 motor draws 15 amps then the power loss is I^2 R 15 x 15 x
.31 = 70W

The same motor at 220 would be 7.5 amps 7.5 x 7.5 x.31 = 17.5 W

70W - 17.5W = 52.5 W You are wasting half the energy it takes to
run a 100 Watt lamp.


You pay for power at 1000W an hour. In my area last time I looked it
was $0.08 / KWh

52.5 / 1000 X .08 = $0.0042

So every hour you run the motor you are wasting 4 tenths of a penny.


I am no expert but I did stay at a Holiday Inn once.