commerical service panel

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mlnk

Senior Member
Commercial service to have a 200 amp fused disconnect box. From that box I want to run into a trough, then to three 100 amp meter with distribution panels.The meters serve a bar and two apartments. The calculated load is about 185 amps. Because there are three 100 amp panels -- Is the service required to be 300 amps?
 

kwired

Electron manager
Location
NE Nebraska
Commercial service to have a 200 amp fused disconnect box. From that box I want to run into a trough, then to three 100 amp meter with distribution panels.The meters serve a bar and two apartments. The calculated load is about 185 amps. Because there are three 100 amp panels -- Is the service required to be 300 amps?
NO.

Funny thing here is if you run to a single 200 amp overcurrent device with your service conductors, those conductors will need to be 3/0 copper or 250 aluminum.

If you had three 100 amp service disconnecting means and a common supply conductor that conductor only needs an ampacity of 185 amps (still ends up needing 3/0 copper or 250 aluminum) even though your overcurrent protection can allow 300 amps to flow without tripping anything.
 

mlnk

Senior Member
By the way, I need to have a separate service disconnect because utility wants 18,000 A.I.C rating.
 

kwired

Electron manager
Location
NE Nebraska
By the way, I need to have a separate service disconnect because utility wants 18,000 A.I.C rating.
Just an FYI, most typical "load centers" have a 22KAIC main breaker and the typical 10kAIC branch breakers are series rated to work with the main.
 
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