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08-15-2014, 04:49 AM   #11
nhamilto40
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Here is how its done. You need two 120V circuits on opposite sides of your 240v center tapped supply.
15A @ 240V = 3.6kw
20A @ 240V = 4.8kw

Use wire to suit your breakers. 14 = 15A, 12 = 20A

Code doesn't apply to anything past the receptacle. After that point its up to the end user.

 NEMAplugs.gif (13.7 KB, 185 views)
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08-15-2014, 05:02 AM   #12
ajdelange
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Quote:
 Originally Posted by mikescooling I'm a new apartment brewer. I pulled the panel and added a 30amp 240v breaker. Then at the end of the brew day, I take the breaker out and put it all back together. It takes about 5min. But you need to be comfortable working in the panel.
This reminds me of the day the crew came to sand/buff my new wood floor. One of the guys came up to me holding the end of an extension cord with bare wires and said "Where's your panel?". I said "Give me that." and put a 240 v plug on it. I made sure I got it back at the end of the day.
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08-31-2014, 12:16 PM   #13
BBBF
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Quote:
 Originally Posted by nhamilto40 Here is how its done. You need two 120V circuits on opposite sides of your 240v center tapped supply. 15A @ 240V = 3.6kw 20A @ 240V = 4.8kw Use wire to suit your breakers. 14 = 15A, 12 = 20A Code doesn't apply to anything past the receptacle. After that point its up to the end user.
So... I can use this diagram and build something similar to the converter in the original post, for a lot less?

My electric brewery was designed around two dedicated, 120V/20a outlets. It works and I am not looking to redesign it, but I have an apple crusher that's 240V and I would like to be able to use it.

How do I find out if my dedicated outlets are in different phases or not?
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08-31-2014, 12:31 PM   #14
ajdelange
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Stick one probe of an AC voltmeter in the wide flat slot in one of the outlets and the other in the narrower slot. Check the voltage. Assume for the moment it is 120V. Now remove the probe from the wide slot and stick it in the narrow slot of the other outlet (use an extension cord to bring the other outlet close to the one you are next to if necessary). You will read 0 volts if the outlets are on the same phase and double or sqrt(3) times the first reading (240 V or 208 V) if they are on different phases. In most homes it will be double. In office, apartment or other commercial buildings it's likely to be 208.

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08-31-2014, 02:48 PM   #15
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Thanks. I tested the outlets and they are the same phase. I assume if someone knows what they are doing, it would be an easy task to open the breaker and change one of the phases.

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08-31-2014, 03:20 PM   #16
ajdelange
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They may be wired to the same breaker in which case there isn't much you can do except find another outlet on the other phase. Inside your panel there are two parallel bars that run from top to bottom, one for each phase. The breakers are installed by pushing them into the panel such that two adjacent normal size breakers will contact different phases and a two pole breaker, which is double width, will have one pole in contact with each. It is indeed a pretty simple matter to switch a breaker from one phase to the other. It can be done by swapping the breaker you want to switch with one adjacent to it.

However, I do not advocate doing this, or anything in your panel, unless you know what you are doing. Another thing to think about is whether your jurisdiction even allows you to work in your panel. In blue states, especially in the cities, it is usually prohibited and I see you are in Chicago.

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09-04-2014, 01:53 AM   #17
BlkWater_brewer
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Curious on one thing here. What size batches are you doing, larger than 10 gallon? A 120 volt element works fine up to 10 gallons. I use a 5K 220v element in my 15 gallon kettle and never raise the setting over 50% power and it's boils in about 12 minutes. This just seems to be over complicating the process for the sake of running 220.

If you want to use the cool SS element, run it at 110/120v and you effectively have 2500watt element. You can always change to 220 later but you will find it's not worth the effort in an apartment.

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Last edited by BlkWater_brewer; 09-04-2014 at 02:05 AM. Reason: addition

09-04-2014, 02:37 AM   #18
Minbari
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Its 4x less power, not half. Soo a 220 vac 5kw element would be 1250w at 120vac.

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09-04-2014, 12:18 PM   #19
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Mea culpa, I just took the first google result and used it. I thought everything on the internet was true?

A far easier method would be to just attach a stove plug to your brew setup and plug/unplug as needed. Besides, gives your wife/gf a chance to clean under the stove. In my first apartment I only used the stove for storing dirty dishes anyway.

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09-04-2014, 12:37 PM   #20
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Just be sure that if you use anything with a timer or a clock that it's herz range is 50-60. You run 50hz only clock on 60hz electricity, you'll gain 10 minutes every hour. And you'll lose 10 minutes every hour if you run a 60hz only clock on 50hz electricity.

Nobody will probably run into that case, but it is worth noting before you decide to order some fancy German-made timer control panel or something that isn't intended for the US market.

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