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Worst case at 240v : Electric hot water heater = 20 amps Electric stove = 50 amps all burners on and oven Washing machine = 15 amps Car charger = 50 amps T
by SigmundA 3y ago
Worst case at 240v :
Electric hot water heater = 20 amps
Electric stove = 50 amps all burners on and oven
Washing machine = 15 amps
Car charger = 50 amps
Total = 135 amps
Standard residential service in the US = 200 amps split phase @ 240v
Whats the problem?
- ou8_1_2 3y agoAll the other 15 amp circuits people take for granted for things like lights, the clothes dryer and the heat/cooling system you left off your list (heat pump + air handler + emergency heat coils)... Add in the 80% rule and 200amps doesn't go as far as one might hope in a gas free-house.
- rcme 3y agoI run my washer and dryer on a single 15 amp circuit. Heat pump dryers are very efficient.
- radicaldreamer 3y agoThere are some induction stove startups that are using batteries to not only not require 240v hookups but perform even better than a standard induction stove... the idea is that with cheap battery technology you can take advantage of the fact that not everything in your house will be running and charging at the same time.
- greenthrow 3y agoThe 80% rule is for running circuits and for breakers. It has nothing to do with actual load capacity. I.e. with 200A service you can have well beyond 200A nominal worth of breakers in your box (250A), but when all those things are running it should still use 200A or less if the 80% rule was followed.
- SigmundA 3y agoI did not make the list, I was replying to the list given. None of those devices pull the rated amount continuous except may the car charger which can be adjusted for less draw / longer charge time if needed. Simply scheduling car charing for overnight would eliminate any issue, even so there is plenty of headroom on a typical residential system.
- JamisonM 3y agoThere are a lot of jurisdictions where piped natural gas is not available and 200 amp service is very common, as a practical matter it is not a big deal. Requiring new builds to have even more electrical capacity and more robust incoming infrastructure is a win-win-win situation and hopefully that is what code & consumers demand.
- somethoughts 3y agoFor a new build - the building code should suggest/require that a battery backup/Powerwall circuit be added that only supplies the essentials. If you can stick to plugin hybrids and go without AC during a power outage... Electric hot water heater = 20 amps Electric stove = 50 amps all burners on and oven Internet, Misc = 1 amps Total < 75 amps
- rcme 3y agoYou didn't include air conditioning, vacuum, power washer, power tools, etc. It's not that you'd be running all these things at once (although AC run a lot), but it's pretty crazy that you could even come close to tripping your main breaker.
- saiya-jin 3y agoPretty crazy? Not sure I follow, if you push anything fancy to the limits shit will happen, and over the limits there are some guarantees you will not like the result. Its not like its year 10'000 and we polished technology, infrastructure and everything to the max physics allow. For example you can easily break whole internet if significant portion of its users decide to download something relatively big at the same time.
- SigmundA 3y agoThe post I was replying to did not specify those devices.