Best Answer

Answer for USA, Canada and countries running a 60 Hz supply service.

(LIFE SAFETY WARNING! [disclaimer]

Electricity is dangerous!

You can be injured or killed!

Improper installations can cause fire, injury and death!

Should you be doing this yourself?)

How do you calculate the load? Every situation is unique. How do you cook dinner? Do you have pork or tofu? Get a cookbook.

The basic information is in the National Electrical Code:

Article 210.18, 220.25

Article 220

Article 430

Article 520

Article 550

p.s. - [hint] Electrical equipment is allowed to be operated continually [over 4 hours] at 80% of nameplate [nominal] rating, unless rated for other loads. This would suggest you can load your panel at 160 amps at 240 volts forever.


I think the answer above is a very good one but may be more academic than you are looking for. You are probably thinking of adding something on and took a look at your service panel. If you start adding up the individual breaker amp ratings you will come up with a number that far exceeds the 200 amp main rating, that is not the way loads are calculated on services, if you have breaker space and unless you double the floor space of your home you should be able to safely add load to your 200 amp service.


As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.




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12y ago
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9y ago

The maximum load of a 200 amp panel is 200 amps. To find out what is being pulled through the panel you would have to add up every single electrical powered device in your home. As all of those devices are not all on at the same time that is really meaningless. Adding up all the breakers is also meaningless. Your electric company can tell you the average load your home is pulling.

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Q: How do you calculate the load your electrical panel has on it for example how many devices or total current can be put on a 200A service panel?
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