Service disconnect
- Thread starter joec1824
- Start date
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
Sounds ok. Some may be concerned with the buss rating of the meter stack if it is under 800 amps, however there is no requirement to protect it at its rating by an OCPD unless specifically stated in the destructions.
Seven-Delta-FortyOne
Goin’ Down In Flames........
- Location
- Humboldt
- Occupation
- EC and GC
I having trouble understanding this scenario.
You’re feeding meters *after* a main disco?
What size is the service? What is the service disconnect rated for? Is the 800A breaker the Service Diaconnect?
S
You’re feeding meters *after* a main disco?
What size is the service? What is the service disconnect rated for? Is the 800A breaker the Service Diaconnect?
S
jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
Not all that unusual, especially when there are more than 6 meters. But it's a bit unusual when there are only 4 meters. The NEC does not care where the meters are but the utility probably does.
jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
What exactly makes the 800 amp breaker oversized? Just the combined ratings of the (4) 150A breakers? Or something else?
Shouldn’t the main breaker always be bigger than the load?
jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
As long as it protects the wire and equipment that's fine.
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
My take on the OP (which may be assuming too much) is that if everything upstream of the 150A breakers were rated for 800A, there would be no question. So my interpretation of the OP is that the question is this:
Suppose we have an install where overcurrent wise, everything is OK, but we are missing a needed disconnect. And now instead of installing say a knife-switch style disconnect, we install an enclosed OCPD. The rating of the OCPD is too high for it to be an appropriate overcurrent device, but we don't need an overcurrent device there. So we just want to use the OCPD as a switch. Is that OK?
Cheers, Wayne
