208 volt circuit and receptacle

[ActionDave]

Don't let the difference in voltage to ground or the third phase distract you in this case. It's just two hots and a two pole breaker per circuit, whether the panel is three phase or single.

 

[LarryFine]

On a 208/120 system was is the minimum number of conductors I can use to install 2 15amp receptacles each on a dedicated circuit?

I assume there are only two choices? 3 or 4?

Yes, and, as you ask the question, the answer is four.

 

[Pierre C Belarge]

Okay, final questions.
Where can I find information on three phase to educate myself?

On a 208/120 system was is the minimum number of conductors I can use to install 2 15amp receptacles each on a dedicated circuit?

I assume there are only two choices? 3 or 4?

Try:

http://en.wikipedia.org/wiki/Three-phase_electric_power

http://www.3phasepower.org/

http://www.kilowattclassroom.com/IES12.htm

http://www.elec-toolbox.com/usefulinfo/xfmr-3ph.htm

Try searching this magazine - a good source of info
http://www.ecmag.com/?articleID=10080&fa=article

 

[Greg1707]

Don't let the difference in voltage to ground or the third phase distract you in this case. It's just two hots and a two pole breaker per circuit, whether the panel is three phase or single.

Isn't there a disagreement between the last two posts? One says "disregard whether it is single phase or three phase" and Larry says four wires.

Okay, once again: three phase panel 208/120. I want to run two 120v 15 amp circuits to two separate receptacles. Excluding the equipment ground wire, what is the minimum number of wires? 2 hots and a neutral or 2 hots and 2 neutrals?

 

[Pierre C Belarge]

"three phase panel 208/120. I want to run two 120v 15 amp circuits to two separate receptacles.
Excluding the equipment ground wire, what is the minimum number of wires? 2 hots and a neutral or 2 hots and 2 neutrals?"

2 hots and a neutral is the minimum number of conductors as per above.

 

[LarryFine]

Okay, once again: three phase panel 208/120. I want to run two 120v 15 amp circuits to two separate receptacles. Excluding the equipment ground wire, what is the minimum number of wires? 2 hots and a neutral or 2 hots and 2 neutrals?

Well, now that you've changed the question, the answer is three.

Up till now, we've been using 208v to answer you, because you originally said:

I have a job installing a circuit for a 208 volt copy machine. The specifications call for a NEMA 6-15 2 pole, 3 wire, grounding rated at 250V/ 15AMP.

What is up with this? If I install this type of receptacle on a 208 volt circuit--what would prevent some unsuspecting person from plugging a 240V device into this receptacle?

Now, you want two 120v receptacles, which can share the grounded conductor.

This will work equally well on either a 120/240v or a 120/208v supply.