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NFPA 70 517.31(B) (2014) downstream distribution system

Question asked by dan@spectrumsystem.com on Dec 11, 2019
Latest reply on Jan 6, 2020 by rcramereleceng

NFPA 70 517.31(B) (2014) says "one transfer switch and one downstream distribution system shall be permitted to serve one or more branches in a facility with a maximum demand on the essential electrical system of 150 kva."  What is considered the downstream distribution system?

 

Why was "and downstream distribution system" added in 2014?

 

Corrected - 2017 not 2014,

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