Electrical Ques. If I can help someone I will...
- Thread starter kushmonster
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winkdogg420
Well-Known Member
Dirtfree
Well-Known Member
I dont think either of those will work because I just have a new line out there. I need something like a panel box. 240 comes in with a couple breakers and i run 120 lines out. Ya know what im sayin? This is the power supply for my whole grow room. I dont want any ext. cords or adapters or BS. Nice, neat and clean.
winkdogg420
Well-Known Member
Ok i just looked it up where the two main wires come in they are 120v each combined to make 240 volt all you need to do is take 1 of the main leads and a ground and there you have it 120v . Just get a junction box and run 1 leg of the 240 and a ground to it and you should have 120v ...i just googled "240volts to 120 volts" plenty of info there!
winkdogg420
Well-Known Member
Im not sure if your 240v is two phase if it is than you can split it like you want to . If you are3 getting 240v from both leads in then you need a stepdown transformer they do make a model that fits in a breaker box but they are 150$ usd . Im not 100% on this but im pretty sure if you take a meter and read 1 side of that 240v and ground the other test lead youy should get 120v...
A ? For real electricians is all 240volt two phase?? Its like running two 120v lines from the pole and using them both to make 240v correct/?
A ? For real electricians is all 240volt two phase?? Its like running two 120v lines from the pole and using them both to make 240v correct/?
careful ground is not suppose to carry current if u use green wire to get 120 u will be putting return current on that ground must have a nuetral or white wire for 120. White carries volatge and current back to panel to complete circuit if u are useing the ground to make 120 u have then just made your ground wire a current carrying conductor which it is not designed for and could caue trouble in other parts of that circuit if u remove that ground while in use u will get zapped becaue it is completeing the path for the electricity to flow i would not suggest doing this because now your ground is not longer a ground it is carrying current and is not going to be safe at all man. Trust me im an electrician for 10 years. If your 240 has a nuetral (white) then thats what u want to use to make 120 not the green or bare copper. It will measure 120 but anything that ground is hooked too can become HOT aka light fixtures ballast houseing. Dirt free u can post in my journel i will be more then glad to return help seeings how you are helping me with my journel.
240 is both legs of electricity comeing into your panel DO NOT USE GROUND FOR 120 this is BAD!!! you must have a nuetral or white wire for 120. Ground is there for saftey and saftey only shorts and such. White or nuetral completes the circuit for current flow. Ground is there so any metal parts like your ballast housing and light houseing , anything that is metal with electricity going through has a Ground (green) to prevent you from getting shocked in case of a short or open circuit. Do not use ground to create 120 you must use nuetral for 120. Its to keep u from getting hurt. You can only get 120 from a 240 source if there is a nuetral available (white wire) , that is the wire that the completes the circuit and lets current flow. Green wire is ground to prevent injury to you and others. I hope i made myslef clear. and btw 240 is called single phase and all houses are single phase not 2 phase.
winkdogg420
Well-Known Member
thank you for clearing that up like i said i knew a real eletrician would straighten out! yes neatral not ground duh SORRY . so dirtfree do you have a neutral wire(white????) and two black and a green/bare??? if so your good to go just read the whole post by XxstelxX that should do it!!
and thanks for straightening me out on the two phase thing! so i guess two phase is when you start doubling 240v lines??
and thanks for straightening me out on the two phase thing! so i guess two phase is when you start doubling 240v lines??
BigBudBalls
Well-Known Member
NA 220/240 is 2 phase. Think about it. trip phase 480 is 3 legs 120 degrees out. 2 phase is 2 leg 180 out. The phase shifts need to add up to 360.
Any leg on a trip phase Wye 480 measured to ground is what? About 277. Do the math and you get 480VAC between phases. (trip phase Delta usually has that wild leg and gives strange measurements in relation to ground)
dude single phase is 120/240 are u an electrician? houses are single phase not 2 phase sorry its called single phase even when both legs are used to make 240. and the math is not as easy as adding it up because there is triganometry envloved because its AC electricity. AC is a sin wave postive and neg. DC is a straight line so it can be added up. I went to school for 4 years man 2 phase is only used in factories where certain motors come into play and i believe they are old and outdated. So i suggest u do some reading up on it man 2 phase is NOT 120/240 its called single phase and every house in the US just about is single phase. Excpetion this guy i wired his house had a garage with CNC machines in it he proto-typed parts for porsche racing and we brought 3 phase to his houses cost him 9 grand just to get 3 phase to his house hahah fucken rich prick. anyways i asked this question in school as well and i was told what im telling you. Learned it in my first year of electrical school man. 120/240 is callled single phase each phase opposes each other so when the sin wave one one leg is at a + number the opposite phase is at a - number thus its called single phase and thats how u get 240. try to buy a 2 phase transformer if u do not believe me they will look at you like you have 3 eyes or somthin. IM tellin the truth here ITS SINGLE PHASE. Call your power company and ask if they supply 2 phase see what they say you are wrong man its called single phase. all 2 wire services are called single phase. Try to buy an electrical panle for your house it will say SINGLE PHASE ON IT not 2 phase. go to homedepot and lookat the panels they say it right on them.
winkdogg420
Well-Known Member
SPLIT PHASE!
Three-wire, 120/240 volt single phase power used in the USA and Canada is sometimes incorrectly called "two-phase". The proper term is split phase or 3-wire
just a simple mistake thanks wiki!
Three-wire, 120/240 volt single phase power used in the USA and Canada is sometimes incorrectly called "two-phase". The proper term is split phase or 3-wire
just a simple mistake thanks wiki!
BigBudBalls
Well-Known Member
Whats the dif between a leg and a phase?
math is math. You sound like a girl I once knew "Thats trig, thats not math" we had a good chuckle over that. no shot at ya)
Why is trip phase 480 obtained by measuring any 2 leg of the 277? Because of the phase shift of the sine wave (120 degrees out) Now, if those same two legs were 180 degree out of phase what would you get?
Just toss it up on a scope and adjust the cursors and you will see.
The voltage is measured from a top peak to the intersection at the bottom of the other leg. Can't go peak to peak, because the two peaks don't happen at the same time on trip phase.
Ever use a single leg of trip phase? Is that one leg still triple phase? No. its one leg, one sine wave, one phase.
'2 phase' may be an incorrect term, but household AC reacts and the math covers it as 2 phase. Its 2 sine wave that are not in phase (in sync or whatever you care to call it)
As for the porche guy, why not just use a phase converter? They have the rotary and slid state versions. Quicker, cheaper and just as good.
math is math. You sound like a girl I once knew "Thats trig, thats not math" we had a good chuckle over that. no shot at ya)
Why is trip phase 480 obtained by measuring any 2 leg of the 277? Because of the phase shift of the sine wave (120 degrees out) Now, if those same two legs were 180 degree out of phase what would you get?
Just toss it up on a scope and adjust the cursors and you will see.
The voltage is measured from a top peak to the intersection at the bottom of the other leg. Can't go peak to peak, because the two peaks don't happen at the same time on trip phase.
Ever use a single leg of trip phase? Is that one leg still triple phase? No. its one leg, one sine wave, one phase.
'2 phase' may be an incorrect term, but household AC reacts and the math covers it as 2 phase. Its 2 sine wave that are not in phase (in sync or whatever you care to call it)
As for the porche guy, why not just use a phase converter? They have the rotary and slid state versions. Quicker, cheaper and just as good.
Dirtfree
Well-Known Member
At least invite me if you are going to have a heated debate about me...LOL... Anyways it worked! My grow room didnt burn down and im still here. It took some thinking to get it to work but its fully operational.
So this is how it went. I have three wires Black White and Green. Both the white and black are hot with 120v running thru them. The green which is normally ground, is my neutral. This would be alot easier if i took pics last night. So forget colors! I took one hot wire(w) and the neutral(g) for one side of the room and the other hot and the neutral and ran it to the other side of the room. Added outlets in a daisy chain and some out lets have thermostats for the fans and such. Everything works perfect. I was a lil worried so i did a test running everything at once, to try to overload or short something. Nope didnt happen. My voltage didnt even dip when my heater came on! I ran everything for over an hour, I mean everything. Of course on a normal day only half the stuff would be running at once. Gentlemen we are good!!
XxstelxX Thanks for chiming in! I will take some pics tonight and let you look over what i did. Im glad i could help you on your grow and now you are helping me!
So this is how it went. I have three wires Black White and Green. Both the white and black are hot with 120v running thru them. The green which is normally ground, is my neutral. This would be alot easier if i took pics last night. So forget colors! I took one hot wire(w) and the neutral(g) for one side of the room and the other hot and the neutral and ran it to the other side of the room. Added outlets in a daisy chain and some out lets have thermostats for the fans and such. Everything works perfect. I was a lil worried so i did a test running everything at once, to try to overload or short something. Nope didnt happen. My voltage didnt even dip when my heater came on! I ran everything for over an hour, I mean everything. Of course on a normal day only half the stuff would be running at once. Gentlemen we are good!!
XxstelxX Thanks for chiming in! I will take some pics tonight and let you look over what i did. Im glad i could help you on your grow and now you are helping me!
winkdogg420
Well-Known Member
i think bigbudballs said not to use the ground as a neutral?? if you are using the ground as neutral what is acting as your ground?? you cant safely run 120 or 240 withouta ground. im pretty sure that without two whites and two blacks you shouldnt split it????? i just want everyboy safe...
winkdogg420
Well-Known Member
so you ran seperate earth grounds from the outlets to the panel??? that should do it!! great work stay safe! pis would be great whn your all setup!
as for the porsche guy we had phase converters running to big cnc machines but he wanted to add like 5 more cnc machines so he bulit a huge attached garage then cam the 3 phase. Phase converters are really expensive and do not provide very clean power. So yes the first solution was phase concersters but he expanded so he wanted 3 phase at his house. LOL he lived down a dirt road in New Hampshire. Anyways we could argue all day and the math thing is a smart ass remark man stick to the facts. Anytime you deal with 3 phase a factor of 1.73 comes into play. Did you go to homedepot and look at the panels???????? Did you call your power comapny and ask for a 2 phase service I think not becasue like i said they would look at you like u have 3 eyes. Yes there are 2 phases in a house BUT its called single phase man wtf is wrong with you Look at any panel you buy a single phase and a 3 phase panels NOT fucken 2 phase smarten the fuck up man.