Do energy storage system breakers need to be fastened per NEC2014 408.36(D)?

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fandi

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Electrical Engineer
Hello All,
These are utility interactive energy storage system (ESS) breakers. I know utility interactive solar PV back fed breakers are omitted to be fastened per 705.12(D)(5) but I can't find the same exception for ESS breakers in the NEC2014 690.VIII. Thanks.
 
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fandi said:
Hello All,
These are utility interactive energy storage system (ESS) breakers. I know utility interactive solar PV back fed breakers are omitted to be fastened per 705.12(D)(5) but I can't find the same exception for ESS breakers in the NEC2014 690.VIII. Thanks.
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You need the fastening hardware. The allowance for not fastening a back fed breaker would only apply to an interactive inverter.
 
texie said:
You need the fastening hardware. The allowance for not fastening a back fed breaker would only apply to an interactive inverter.
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But can ESS built in inverters be counted as interactive inverters?
 
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Also do ESS systems have to comply with [FONT=&quot]CEC 2016 705.12(D)(3) because [/FONT][FONT=&quot]ESS systems will never back feed to the grid?[/FONT]
 
fandi said:
But can ESS built in inverters be counted as interactive inverters?
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In this case common sense applies. When the inverter is running, if you were to pull its connecting breaker out of the panel would the breaker terminals remain hot? If so, you have to tie it down.
 
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