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BLUCK24 · Jan 14, 2007, 10:11 PM

I Have A Overhead Service With Single Phase 220v 600amp Going To 23 Boat Docks And A Small Club House And A Garage . I Need A All New Service Change And A Rewire To The Boat Docks . I Calculated The Dock Service Demand Load According To Nec 555-12 It Comes Out To Be 486 Amps I Have 5- 125 Amp 220v Feeders Going To The Docks And 1- 200amp For The Club House And Garage. I Want To Know What Is My Best Bang For The Buck, All In One Load Center , Meter With 6- 2 Pole Breakers,so I Can Put Back On The Side Of The Building With A Overhead Service . I Am Considering The Milbank Condo Metering Bank U2866x To Do The Job .that Way I Can Charge For Usage I Am Not Sure If The Utility Will Supply Meters Or How That Will Work, I Have Not Run Across A Single Meter 600 Amp All In One , To Do The Job . I Want It To Be One Box That Does It All ,so It Is Clean. Does Any One Have A Idea .

Bill

tkrussell · Jan 15, 2007, 03:59 AM

Before choosing any utility metering equipment, you must check with your utility company to learn their requirements and type of meter equipment they will accept. They will offer several manufacturers that have the characteristics they want.

Utilities usually furnish the actual meters that they will set and seal in your metering equipment.

You will not find 1 self contained meter socket rated 600 amps. One 600 amp service with one meter will need what is called a CT cabinet, usually 3 ft x 3 ft. The 600 amp conductors will pass through the CT cabinet and will contain current transformers that will then feed signals to a meter cabinet, that can be remote mounted up to 50 feet away.

I am not sure how you are doing the calculations. How did you figure in the club house and garage, and 23 dock outlets, using 555.12? Can you show how you arrived at 486 amps connected load, and include the garage and club house? Keep in mind the total calculated demand load cannot exceed 80% of the 600 amp service, which is 480 amps.

How do you get separate metering using 5 meters for 23 dock outlets?

BLUCK24 · Jan 15, 2007, 03:51 PM

My calculated amps per dock line 1 and or L2 ,equal 570 amp. I have over 30 receptacles per line ,NEC 555-12 says 60% to determine service demand (mike holt).

The club house is still pending I just wondered if something new as far as panels go was out to make the job go faster. It looks like were going to do the ct cabinet route still have not spoke with the utility,working on it.

Bill

tkrussell · Jan 15, 2007, 04:43 PM

OK the demand load is 570 amps, does not appear that 600 amps service is sufficient, just for the boat dock outlets and then you still need to add the demand of the club house and garage.

What is the load per dock outlet, to arrive at 60% of what total?

In your first post you said you had 23 dock outlets, which would use 70% of the total sum of the dock receptacles,and you say the total demand was 486 amps.

Now you say over 30 ,which is 60% of the total sum, and the total demand is 570 Amps.

Which is it, 23 or over 30?

Please give me the actual total dock slips, how many outlets per slip, and the load per outlet(s), so I can be sure you are doing the calcs correctly.

Next we need to add the demand load of the club house and garage to the total demand of the dock power to arrive at the size main service.

And I asked how you plan to separately meter 23, or now over 30, dock outlets, only using 5 meters.

Not sure what you mean by the statement:

"I just wondered if something new as far as panels go was out to make the job go faster."

BLUCK24 · Jan 15, 2007, 07:01 PM

Thanks for your help TK . I will go with more Service. The service demand will be factored at 486 amps for the docks not 570 amp . I still have to find out more info on the clubhouse I will ask again when I know more.

Bill