differnt voltages
- Thread starter Jeff Rae
- Start date
- Status
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Re: differnt voltages
Yup.
Yup.
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: differnt voltages
The technical issue is that they must all have a voltage rating on their insulation systems that is at least as high as the lowest rated system. In this case, all of those conductors will have an insulation system rated at 600 volts. So I agree: "yup."
The technical issue is that they must all have a voltage rating on their insulation systems that is at least as high as the lowest rated system. In this case, all of those conductors will have an insulation system rated at 600 volts. So I agree: "yup."
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Re: differnt voltages
Didn't want to be short with my first answer got called away, but as Charlie had mentioned the insulation rating is one consideration and the the second consideration would be the identification of the neutrals.
Under the 2002 NEC the neutrals from different systems had to be identified by one systems' neutral having a stripe. This has been changed in the 2005 NEC whereas one system may have a neutral that is grey in color while the other has a neutral of white in color.
Didn't want to be short with my first answer got called away, but as Charlie had mentioned the insulation rating is one consideration and the the second consideration would be the identification of the neutrals.
Under the 2002 NEC the neutrals from different systems had to be identified by one systems' neutral having a stripe. This has been changed in the 2005 NEC whereas one system may have a neutral that is grey in color while the other has a neutral of white in color.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Re: differnt voltages
Mayhaps you meant highest?
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: differnt voltages
I might have. In fact, I might have meant that all insulation systems must be rated for the highest circuit voltage applied to any conductor in the raceway. 300.3(C)(1).
That's one "attaboy" to Larry, and one "oops" to me. (Note: An "oops" is not as bad as an "ah-shoot," in that it doesn't erase all previous "attaboys.")
I might have. In fact, I might have meant that all insulation systems must be rated for the highest circuit voltage applied to any conductor in the raceway. 300.3(C)(1).
That's one "attaboy" to Larry, and one "oops" to me. (Note: An "oops" is not as bad as an "ah-shoot," in that it doesn't erase all previous "attaboys.")
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