Your Electrician Here

OORRR you can buy a AC to DC Adapter, 110v AC to 12v DC converter. it costs like 12 dollars? then jsut get a splitter so you can run two fans. its what i did.
 
Hooking up a 220V breaker to install an electric heater to get rid of my gas space heater and the CO2. The heater is 4000W. So I will install a 20A double switch breaker. Can I use 12-2 wire ?
 
OORRR you can buy a AC to DC Adapter, 110v AC to 12v DC converter. it costs like 12 dollars? then jsut get a splitter so you can run two fans. its what i did.
Click to expand...

I haven't been able to find a converter that is over like 200mA. The fans are 500mA each.... will this matter? burn my house down? :D
 
Ok, I'm beginning to re-think this.... Solar Powered?

Check out this link to this panel: http://www.northerntool.com/webapp/...omer driven-_-Recently Viewed-_-Category Page

I could snag a deep cycle battery for the panel to charge... or... could I power the fans directly from the panel? Skip the battery? I'm only gonna need the fans on when the sun is out.

So what's the concensus.... Will it spin the fans at full speed? I'd imagine the speed of the fans would start out slow in the mornings and rev to full speed by noonish, then kinda wind down later in the day...... which is... EXACTLY what I'm looking for.

Is my thinking totally off on this? Will the power saved from 5-10 fans be worth the $100ish investment?
 
<a href=showthread.php?s=&postid=10993333#post10993333 target=_blank>Originally posted</a> by kysard1
Hooking up a 220V breaker to install an electric heater to get rid of my gas space heater and the CO2. The heater is 4000W. So I will install a 20A double switch breaker. Can I use 12-2 wire ?
Click to expand...
Ohms law .... in a Y system 4000 watts / 208 volts = 19.23 Amps or in a 240 volt Delta system 4000w / 240 v = 16.6 amps. The # 12 wire can carry up to 20 amps, yes you can use 12-2 but in a Y system @ 19.23 amps I would use # 10. Its always safer to go @ 80% of load in wiring. Code demands that.
 
<a href=showthread.php?s=&postid=10990300#post10990300 target=_blank>Originally posted</a> by rustybucket145
Ok, I picked up a couple of fans from Northern Tools to use as cooling for my tanks. Here's a link to the fans: http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200308149_200308149

In a perfect world this is what I would like to do (for as cheaply as possible :D)

I'm handy with electrical, but when it comes to electronics I get lost real quick.

I'd like to have some type of thermostat under my canopy.... set for say... 80 degrees. When it's above 80degF I want the fans to come on and of course when it drops, the fans should go off. I don't think a normal HVAC thermostat would work in this situation b/c the contacts would corrode very fast in a SW application, so finding a thermostat is my first 'issue'.

Second, I'm a little confused when it comes to power sources. I believe the fans are 12vDC 500mA. So for two fans would I need a 12vDC 1A power source?

Third, I'd like to be able to control the speed of the fans. In a perfect world I'd like for the temperature to regulate the speed of the fans, ie; 75deg fans come on slow; 80deg fans go to med; 90 deg fans go to high. But I'd settle for being able to set the fans to half speed and be controlled on/off by the thermostat.

I'd also like to have the ability to add more fans later down the road. Could I oversize my power supply in order to build for addition of more fans down the road? For example 4 500mA fans would need a 2A power supply?

Any ideas or suggestions you guys may have on this would be greatly appreciated.

Thanks for any guidance or suggestions!!
Click to expand...
To vary speed at different temperatures you would need a thermistor, a 555 timer, a lm317 regulator and a 2N3055 transistor, it gets really complicated and you just gave me an idea for my next project :D at this point you need a 1 Amp 12vdc power supply, any pc power supply can deliver that. You will also need a 120 v 20 amps or 30 amps thermostat ( you rely need only 1 amps, but the line thermostats are usually rated 30 amps) I am currently using 2 of those line thermostats and picket them up for $ 9.00 each. I am gone post some picks tomorrow.
 
Ohms law .... in a Y system 4000 watts / 208 volts = 19.23 Amps or in a 240 volt Delta system 4000w / 240 v = 16.6 amps. The # 12 wire can carry up to 20 amps, yes you can use 12-2 but in a Y system @ 19.23 amps I would use # 10. Its always safer to go @ 80% of load in wiring. Code demands that.



How do I know if I will have 208 or 240V ?

I will be adding the breaker on a spot under my meter where my well pump breaker is.

It will be wired straight to the heater (dedicated.) What is a Y system ?
 
O,
Kinda OT ,but you may have an answer for me.

2 flourescent fixtures, same circuit, 120V. With my Fluke amp meter I read 3.4A on one, and 4.4A on the other. But on the leg feeding both fixtures, I only read 5.67A.

Shouldnt the amp draw on the feed equal the total amp draw of the 2 loads????
What gives?
 
<a href=showthread.php?s=&postid=11016325#post11016325 target=_blank>Originally posted</a> by H20ENG
O,
Kinda OT ,but you may have an answer for me.

2 flourescent fixtures, same circuit, 120V. With my Fluke amp meter I read 3.4A on one, and 4.4A on the other. But on the leg feeding both fixtures, I only read 5.67A.

Shouldnt the amp draw on the feed equal the total amp draw of the 2 loads????
What gives?
Click to expand...
yes the total load should equal I1+I2=ITTL, How are these connected, that's a weird one :confused:
 
<a href=showthread.php?s=&postid=10995012#post10995012 target=_blank>Originally posted</a> by kysard1
Ohms law .... in a Y system 4000 watts / 208 volts = 19.23 Amps or in a 240 volt Delta system 4000w / 240 v = 16.6 amps. The # 12 wire can carry up to 20 amps, yes you can use 12-2 but in a Y system @ 19.23 amps I would use # 10. Its always safer to go @ 80% of load in wiring. Code demands that.



How do I know if I will have 208 or 240V ?

I will be adding the breaker on a spot under my meter where my well pump breaker is.

It will be wired straight to the heater (dedicated.) What is a Y system ?
Click to expand...
The most common house current is a delta-240 volt system, but is just that "the most common" you may have a 208 volt system. How to find out ? just get a tester and measure the voltage :D
 
<a href=showthread.php?s=&postid=10996057#post10996057 target=_blank>Originally posted</a> by jackfrost
O Agios = The Saint (In Greek)

Nice one...but your are no Saint my friend.

;)

O Theos (The GOD !)
Click to expand...
Never claimed to be a saint my friend, that's just a nic I like :D WELCOME TO RC :D
 
O Agios-

I found today I have stray voltage in my basement sump, via painful cuts on my fingers. It is coming from a Sequence Tarpon(external pump). I'm suprised that it runs all over the sump, even into an external skimmer.

Since I installed the GFI's, its safe to assume I did it incorrectly, right? Would having the wires at the GFI switched(hot/neutral) cause the actual stray voltage, as well as the GFI's failure to trip?

I cannot recall if there was a ground in the wire I tapped into. I have fairly old wiring in most of my house, so even if there was- no guarantee its a proper ground.

Is it possible to ground the pump itself to an incoming pipe or concrete wall? What do you suggest I do?

Thanks
 
Hi O agios

I have been considering a portable generator as a back up for the house & aquarium. I figured that a 3500~4400 watt. would be enough to get me by with a few things, but not the entire house. My display with lighting is about 8 ~ 10 amps so I'm covered there. Would there be a problem / damage with running the pumps on this system. I have seen inverter generators that are for electronic equipment, but they are rather expensive.
I do own an inverter & was wondering if it can be used with the DC output (12v ~ 8 amp) of the generator to use for sensitive equipment ( Computer, etc..) or is the amperage output too low on the DC output for the inverter to work properly.

Thanks For A Reply

Steve 926

:smokin:
 
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