230.85 on 400 amp services

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
We have had our 1st AHJ adopt 230.85 (this area has been on the '2017 NEC previously)
On 400 amp services (dual 200 amp panels) what is the most common method of addressing this requirement in your area ??
 

Greentagger

Senior Member
Location
Texas
Occupation
Master Electrician, Electrical Inspector
No difference. 2 -200A exterior mains, grouped, and each labeled EMERGENCY DISCONNECT. Did I misunderstand the question?
 

shortcircuit2

Senior Member
Location
South of Bawstin
We have had our 1st AHJ adopt 230.85 (this area has been on the '2017 NEC previously)
On 400 amp services (dual 200 amp panels) what is the most common method of addressing this requirement in your area ??
Welcome to the nightmare!
Below is an example of an installation in 2020 when no equipment was available with sectioned disconnects per 230.70 IMG_8413-2.JPG
 

tortuga

Code Historian
Location
Oregon
Occupation
Electrical Design
I get NUMEROUS calls about insurance calling all Zinsco bad and people needing their mains replaced. I would just make sure the customer knows enough to call out their insurance.
Same here, and I have never came across any real peer reviewed published research that all Zinsco are bad, just hype up by 'home inspectors'.
I have herd some anecdotal experiences where they don't trip but thats all.
 
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