ron pfeiffer
Member
- Location
- Illinois
I am installing 30amp hand dryers in an office building. Can I use a #10 white as the neutral for 2- circuits in one pipe or do I need to run a neutral for each circuit?
Neutral conductor
- Thread starter ron pfeiffer
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Neutral conductor
Is this a 120/240 single phase, 120/240 3 phase delta, or 120/208 3 phase wye?
Is this a 120/240 single phase, 120/240 3 phase delta, or 120/208 3 phase wye?
- Location
- Massachusetts
Re: Neutral conductor
Yes, you can use a common neutral for this, as long as you are feeding from different phases (sorry if you already know that)
Depending on the service feeding this, the neutral may or may not need to be counted as a current carrying conductor.
120/240 single phase service the neutral will not be a current carrying conductor.
120/208 3 phase wye service the neutral will be a current carrying conductor because you are only using 2 of the 3 ungrounded conductors.
Look to 2002 NEC 310.15(B)(4)(a)(b)(c) for info on this.
Yes, you can use a common neutral for this, as long as you are feeding from different phases (sorry if you already know that)
Depending on the service feeding this, the neutral may or may not need to be counted as a current carrying conductor.
120/240 single phase service the neutral will not be a current carrying conductor.
120/208 3 phase wye service the neutral will be a current carrying conductor because you are only using 2 of the 3 ungrounded conductors.
Look to 2002 NEC 310.15(B)(4)(a)(b)(c) for info on this.
frenchelectrican
Senior Member
- Location
- Nord'est Wisconsin et Paris France
Re: Neutral conductor
ron : what voltage the hand dryer is set up ?? it can make a diffrence i know most hand dryer are set up for 120 or 240 or 208 or 277 volts that one of the 4 common voltages the most common i see is etiher 120 or 277 depend on where it located
merci marc
ron : what voltage the hand dryer is set up ?? it can make a diffrence i know most hand dryer are set up for 120 or 240 or 208 or 277 volts that one of the 4 common voltages the most common i see is etiher 120 or 277 depend on where it located
merci marc
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Neutral conductor
iwire, thanks for the clarification on 120/208 nuetrals. This rule is very often overlooked.
iwire, thanks for the clarification on 120/208 nuetrals. This rule is very often overlooked.
ron pfeiffer
Member
- Location
- Illinois
Re: Neutral conductor
Thanks iwire and everyone for clarifing this issue.
Thanks iwire and everyone for clarifing this issue.
- Status