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#1
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30 amp from two 15 amp breakers
Hey All - got a question about something thats been bugging me tonight
(dont worry im *not* going to do this, im just interested to know if its possible). Is there any difference between a 30 amp breaker (2 hots, one out of each pole of the breaker), and two 15 amp breakers, one hot coming out of each? ie, if you wired a 30 amp plug, would both of the above equate to the same thing? What problems would arise, etc? sorry if its a dumb question |
#2
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30 amp from two 15 amp breakers
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#3
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30 amp from two 15 amp breakers
Well electrically it should be the same but separate breakers won't trip
off together unless linked which may or may not be possible. By plug I presume you mean receptacle. The problem that would arise would be someone going to work on it or equipment plugged into it might only switch off one leg and get a nasty surprise. This might be ok in a temporary situation with outlet and both breakers suitably labeled but nothing you'd want to do permanently. Labels fall off and people leave, forget or simply don't understand the concept. |
#4
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30 amp from two 15 amp breakers
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#5
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30 amp from two 15 amp breakers
wrote in message oups.com... Hey All - got a question about something thats been bugging me tonight (dont worry im *not* going to do this, im just interested to know if its possible). Is there any difference between a 30 amp breaker (2 hots, one out of each pole of the breaker), and two 15 amp breakers, one hot coming out of each? ie, if you wired a 30 amp plug, would both of the above equate to the same thing? What problems would arise, etc? Yeh, there are three differences. 1) A 30a 240v breaker (I think that is what your are referring to) puts out 30a 240v. Your pair of 15a 120 breakers put out either 15a 240v or 30a 120v (or even 0a 0v) depending on how your circuit was. 2) The 240v breaker will trip both sides simultaneously; the pair of 120v breakers won't. 3) The 240v breaker can't be put in the circuit box stupidly (see previous question); the pair of 120v breakers can. Don't use the 120v breakers for 240v. And if you have to ask this question, thing about whether you really want to do this project yourself. |
#6
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30 amp from two 15 amp breakers
Oops I misread your post and thought you were using the two breakers of the
same value on different legs in place of a double breaker. That would indeed be electrically the same though not a good idea for reasons cited. As for the question you really did ask a 30 A two pole breaker would pass 30 A on each leg, not 30 total. In 240 or 208 V usage 30 A would be going out one line and back the other so still just 30 total as it's across two hots. Naturally 30A breakers would not offer proper protection on a 15 A circuit. And on the 2nd question two individual 15 A breakers would not suffice to feed a 30A recepticle. |
#7
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30 amp from two 15 amp breakers
little 15 amp wires carry 15 amps
big 30 amp wires carry 30 amps. giving little wires big amps makes big fires. never mix or match any unmatched wires to their breakers. if you do you put the next electrician at risk. |
#8
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30 amp from two 15 amp breakers
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#9
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30 amp from two 15 amp breakers
In article et, Steve Kraus wrote:
Well electrically it should be the same Wrong. The OP asked about a 30A double-pole breaker vs. two 15A single-pole breakers. *Obviously* not the same. -- Regards, Doug Miller (alphageek at milmac dot com) It's time to throw all their damned tea in the harbor again. |
#12
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30 amp from two 15 amp breakers
In article , "Joseph Meehan" wrote:
No question is a dumb question when you don't know the answer. In this case going ahead without guidance could lead to serious issues. I my book that makes it a very wise and good question. Sorry, can't agree. The OP was asking, essentially, if a 15A breaker and a 30A breaker are the same thing. It is obvious that they are not. Hence it's a dumb question. -- Regards, Doug Miller (alphageek at milmac dot com) It's time to throw all their damned tea in the harbor again. |
#13
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30 amp from two 15 amp breakers
Doug Miller wrote:
Sorry, can't agree. The OP was asking, essentially, if a 15A breaker and a 30A breaker are the same thing. It is obvious that they are not. Hence it's a dumb question. In the end, yes. But I can see where someone might think a double breaker with a single handle that has "30" written on it is composed of two 15A breakers, not two 30A breakers. It's wrong but it wasn't pulled out of thin air; there is a logic to the wrongness. So not all that dumb a question. Here's a distantly related question. Is it ever permissible to use a two pole breaker for two 120V circuits not for 240/208? Let's say someone wanted to ensure that when circuit is turned off or tripped the other is off as well. Maybe for some equipment that for whatever reason has two 120V feeds and you wish to enforce that it's completely dead. |
#14
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30 amp from two 15 amp breakers
In article et, Steve Kraus wrote:
Doug Miller wrote: Sorry, can't agree. The OP was asking, essentially, if a 15A breaker and a 30A breaker are the same thing. It is obvious that they are not. Hence it's a dumb question. In the end, yes. But I can see where someone might think a double breaker with a single handle that has "30" written on it is composed of two 15A breakers, not two 30A breakers. It's wrong but it wasn't pulled out of thin air; there is a logic to the wrongness. So not all that dumb a question. Seems to me pretty obvious that something labelled "30 amp" is a 30-amp breaker, not two 15s. But hey, maybe that's just me. Here's a distantly related question. Is it ever permissible to use a two pole breaker for two 120V circuits not for 240/208? Let's say someone wanted to ensure that when circuit is turned off or tripped the other is off as well. Maybe for some equipment that for whatever reason has two 120V feeds and you wish to enforce that it's completely dead. Certainly. That's no problem at all. In fact, in the situation you suggest, it's the best thing to do. -- Regards, Doug Miller (alphageek at milmac dot com) It's time to throw all their damned tea in the harbor again. |
#15
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30 amp from two 15 amp breakers
"Steve Kraus" wrote in message nk.net... Doug Miller wrote: Sorry, can't agree. The OP was asking, essentially, if a 15A breaker and a 30A breaker are the same thing. It is obvious that they are not. Hence it's a dumb question. In the end, yes. But I can see where someone might think a double breaker with a single handle that has "30" written on it is composed of two 15A breakers, not two 30A breakers. It's wrong but it wasn't pulled out of thin air; there is a logic to the wrongness. So not all that dumb a question. Here's a distantly related question. Is it ever permissible to use a two pole breaker for two 120V circuits not for 240/208? Let's say someone wanted to ensure that when circuit is turned off or tripped the other is off as well. Maybe for some equipment that for whatever reason has two 120V feeds and you wish to enforce that it's completely dead. Sure, why not? It is commonly done on multiwire circuits, though one might call that a 240v. I have a duplex breaker that lets you put either two 240v breakers in the space of one normal 240v breaker, or one 240v breaker and 2 120v breakers; depending on whether or not you remove a handle tie. |
#16
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30 amp from two 15 amp breakers
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#17
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30 amp from two 15 amp breakers
Wow, I'm not even sure what the question is. "two hots, one coming out of
each pole". That makes for a 30 twin, or a double 30 or.... -- Christopher A. Young Do good work. It's longer in the short run but shorter in the long run. .. .. wrote in message oups.com... Hey All - got a question about something thats been bugging me tonight (dont worry im *not* going to do this, im just interested to know if its possible). Is there any difference between a 30 amp breaker (2 hots, one out of each pole of the breaker), and two 15 amp breakers, one hot coming out of each? ie, if you wired a 30 amp plug, would both of the above equate to the same thing? What problems would arise, etc? sorry if its a dumb question |
#18
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30 amp from two 15 amp breakers
: It's a dumb question. : NO, it's not. The only dumb question is the one that doesn't get asked. "Would you rather slide down a razor into a barrel of iodine, or drink a bucket of monkey snot?" --The book of stupid questions. |
#19
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30 amp from two 15 amp breakers
replying to TURTLE, NeedingHelpFindingNone wrote:
No a 30 amp Double circuit and a 15 amp double circui learn to write. not only was that impossible to read, but it didn't answer the question. -- for full context, visit https://www.homeownershub.com/mainte...ers-55729-.htm |
#20
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30 amp from two 15 amp breakers
learn to write. not only was that impossible to read, but it didn't answer the question. learn to read (the date) m |
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