MY question or subject is about wirways above four different panels. I know from a professional sense you do not want to cross circuits in the wireway to the different panels or splice unnecessarily. A coworker told me that you cannot mix the panel circuits without dividing them ; not by tyraps but actual metal barriers between the panel sections. I could not find any code requiring this , am I right ? I thought of this as just a field practice or job lead spec or preference.
djd
- Thread starter djd
- Start date
- Status
Other than some restrictions on emergency circuits (Art 700), I don't know of any restrictions. Problems do arise from the requirement to derate when you have in excess of 30 conductors in any one cross-section or with mult-wire branch circuits (Section 210.4)
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
There are also restrictions on mixing article 725 conductors with normal Power and lighting conductors.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
I meant to continue on with this a little bit but somehow hit post on my phone without realizing it and then went away and by the time I got back the edit time had expired.
In general there is no requirement that I can recall other than perhaps the ones mentioned by other posters that requires you to segregate power conductors in a Raceway by what panelboard they are fed from. As a practical matter it's a whole lot easier usually if you don't have to do that. Have you considered putting a gutter across the top of the panel boards and feeding the conduit into the gutter?
In general there is no requirement that I can recall other than perhaps the ones mentioned by other posters that requires you to segregate power conductors in a Raceway by what panelboard they are fed from. As a practical matter it's a whole lot easier usually if you don't have to do that. Have you considered putting a gutter across the top of the panel boards and feeding the conduit into the gutter?
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
I think that is what he does have.
Limitations are what has been mentioned so far - 30 current carrying conductors at any cross section (or make ampacity adjustments), possible limitations on mixing conductors of certain mentioned systems.
Whether what he has is an aux gutter (art 366) or a metal wireway (art 376) the rules concerning already mentioned items are basically the same.
- Status