Hi Steve:

 

The TV broadcast industry electronic products have used two (redundant) AC 
sources for their products for many years.  You may have some help there.

 

Rich

 

 

From: Steve Brody <sgbr...@comcast.net> 
Sent: Thursday, April 6, 2023 1:42 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Multiple electrical power sources

 

A new question. 

 

A client's product is using two independent AC power sources on a product, but 
I can't find anything in 61010-1 60204-1 that provide any guidance on 
compliance. 

 

The obvious is that the sections of the product that are fed from source A or B 
are not interrelated in any way that would create a hazard for for the other 
section, that there be a warning label adjacent to each input that says there 
are multiple AC sources, and that each section has it's own circuit protection 
and disconnect, even if a facility disconnect is used for both. 

 

What am I missing? 

 

Thanks, 

 

 

Steve Brody 

sgbr...@comcast.net <mailto:sgbr...@comcast.net>  

C - 603 617 9116 

 


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