What the max load of each circuit is will depend on how much amperage and wattage it can handle within safe limits. As I am far from a electrician my only advice would be to call your hydro company an ask. You can get an electrician to inspect your powerbox and inform you what sort of load you can put on safely. Having an electrician come over will of course cost something, but if you are in an older house it may be worth it in the long run. Old circuit breakers that are fused should be replaced and if they are not visibly noticeable, the only way you can tell would be to have them inspected and tested. If you still have a fuse box, that is something else to check.



If you get all that done, get the papers from the electrician stating everything is to standard and let your insurance company know. They may lower your insurance payments slightly, because you have up to date breakers.



I don't think 400W would be a problem on a single circuit. Most basical appliances use at least that if not more.
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PHLdyPayne

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