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Old 06-21-2012, 03:29 PM   #31
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What does "120/208" volts mean?


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Originally Posted by curiousB
I think the OP long left this debate.

Many devices are rated for multiple voltages. Particularly resistive heaters.

120/240 vac is most common in residential
120/208 is most common in commercial (due to 3 phases)
Agreed. Why is it that almost everything posted here is turning into a d1ck measuring contest. When we try to explain something simple somebody has to come along and elevate it to engineering level. And I will admit I'm just as guilty of it as well.

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Old 06-21-2012, 07:52 PM   #32
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What does "120/208" volts mean?


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Old 06-21-2012, 10:50 PM   #33
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What does "120/208" volts mean?


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Originally Posted by electures View Post
Agreed. Why is it that almost everything posted here is turning into a d1ck measuring contest. When we try to explain something simple somebody has to come along and elevate it to engineering level. And I will admit I'm just as guilty of it as well.
Personally I don't have a problem with it. The original post mave have been answered but expanding on a topic is almost always a learning experience. What I don't care for is when stones start getting thrown because someone gets impatient with another members alternate explanation. We are all going to be somewhat 'incomplete' on this subject of 3 phase vs single phase. I would hate to see how many pages the 'complete' explanation encompasses ....
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Old 06-22-2012, 01:03 AM   #34
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What does "120/208" volts mean?


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We are all going to be somewhat 'incomplete' on this subject of 3 phase vs single phase. I would hate to see how many pages the 'complete' explanation encompasses ....
2500+ posts on one thread at my regular forum and we still never agreed.
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Old 06-22-2012, 05:38 AM   #35
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What does "120/208" volts mean?


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So does that mean that 277v lighting is not single phase. My intention was to explain in simple terms what 120/208v is to an armature. If you want to get into a discussion on separately derived systems this is not the place. I would be more then willing to continue this discussion at electrician talk.com.
I don't understand the comment about 277V lighting. In order to answer any question about phase, we need to be clear about whether we are talking about loads or services/SDS's. You can place single phase loads (277V lighting) on a three phase 277/480V service or SDS. I really don't understand the comment about SDS. An SDS is no different than a service, except that it's supply is something other than the utility.

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