Emergency is Art 700, Legally Required is Art 701. “Life Safety” branch gets broken down in Art 517
2 sources of Power in same conduit ?
- Thread starter Isaiah
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lordofthisworld
Senior Member
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- Massachusetts
Article 517 falls under hospitals. There is life safety panels in establishments other than hospitals, in which, the code will fall under article 700. In Legally required, A701 and Optional, A702, u can have 2 sources of power, emergency or normal, in the same raceway but u r not allowed if its Life Safety.
My comment was you said Article 700 was Life Safety, It’s Emergency. Article 701 is Legally Required, not “Life Safety”, and that the Life Safety branch was part of the Essential Branches in Art 517, hospitals.
kwired
Electron manager
- Location
- NE Nebraska
and after you connect them together they are effectively one and the same. Grounded neutrals however since they are current carrying are not one and the same. If "shared" it will work, but will carry two different currents at same time which depending on circumstances and (ignoring that code likely won't let you "share" the conductor one would possibly need to more carefully calculate the heating effects of the combined currents when selecting conductor size.
Earlier mentioned that one neutral would need to be white and the other gray is not necessarily the rule, is one way to meet the rules though. Each neutral does need white or gray finish but can be identified by system/voltage by other means like stripes or other tracer markings, or even field markings, tagging, etc.
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