Overcurrent protection

blueheels2

Senior Member
Location
Raleigh, NC
Occupation
Electrical contractor
I was doing a job Friday where I was adding 3 circuits to an outdoor kitchen. Saw an exterior “meter main combo” and decided I would pull the circuits from there instead of the interior subpanel. I drilled the hole opened the panel and realized its one of the typical “meter mains” around here that doesn’t have a main. Just a meter no main. So there were 3 breakers in the panel. 1 for the interior sub and the other 2 were for HVAC equipment. It’s legal (grandfathered) as far as disconnects go in that 3 swiped of the hand kills the loads to the houseBut what protects the bus in the panel? In this scenario couldn’t I add loads in excess of 200 amps and it would never trip the breaker because there is no overcurrent protection for the service/bus bar?
What am I missing?

Mia this really legal?
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
Yes, it is/was legal, just like a split-bus panel. Proper load calcs and load diversity protect the bus.
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
This service falls under the 6 service disconnect rule so with 6 circuit breakers it's code compliant. As Larry stated with multiple service disconnects a load calculation is what protects the service from being overloaded.
 

jap

Senior Member
I was doing a job Friday where I was adding 3 circuits to an outdoor kitchen. Saw an exterior “meter main combo” and decided I would pull the circuits from there instead of the interior subpanel. I drilled the hole opened the panel and realized its one of the typical “meter mains” around here that doesn’t have a main. Just a meter no main. So there were 3 breakers in the panel. 1 for the interior sub and the other 2 were for HVAC equipment. It’s legal (grandfathered) as far as disconnects go in that 3 swiped of the hand kills the loads to the houseBut what protects the bus in the panel? In this scenario couldn’t I add loads in excess of 200 amps and it would never trip the breaker because there is no overcurrent protection for the service/bus bar?
What am I missing?

Mia this really legal?

You are correct, and, services like this can become taxed more so than others for that very reason.

I kind of like that though. :)

JAP>
 
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