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#125332 - 12/23/04 10:15 AM Do I Need a Service Upgrade?

My home was built in 1975 and has 100A service.

There was some remodeling done in the past in various rooms. New high hats were added, bathroom fans and lights, and ceiling fans as well. There were new breakers added to the box and everything has been running fine. No breakers ever trip with normal day to day use.

I now wish to remodel my kitchen. As of now the refrigerator and dishwasher are on the same 20A line. The hood is on the line with the counter outlets.

I want to add a compactor and an upgraded hood and recessed lighting. Also, I'd like a separate cooktop and wall oven instead of the 220v range that’s there now.

I know that it's recommended that the dish washer, refrigerator, hood, and counter outlets have there own line. So at least two more lines would be needed.

Here's what I have currently

- Label on the circuit box says "Thomas & Betts" and has 24 knockouts

- Box has:
(8) 15A
(5) 20A
(1) 220v 40A -kit range
(1) 220v 30A -dryer
(1) 220v 20A -20,000 btu thru wall a/c
(1) 220v 100A -main
There are three knockouts left unpunched.

- Oil Heat w/ baseboards and the boiler is on its own 15A line.

- I have dedicated 15A's on the clothes washer, boiler, and another for 3 exterior motion lights

-I have dedicated 20A's on the swimming pool, and for fridge/dw

- 220v Electric cooking & Clothes dryer.

QUESTION: How do I determine if I need to upgrade my service? Is there a formula to calculate the max load?

[This message has been edited by brianosaur (edited 12-23-2004).]

#125333 - 12/23/04 10:39 AM Re: Do I Need a Service Upgrade?
hbiss Offline

Registered: 12/16/03
Posts: 893
Loc: Hawthorne, NY USA
I suggest that you contact an electrical contractor in your area who can do do a load analysis as well as inspect your current service and then recommend what to do.

You are going to need an EC to do this work anyway and this is where you start.



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