[mrandish]

Some US washers don't but many do. However, US washers tend to not heat water as quickly or to as high of a temp. The video cites two reasons: 1. US power being 110V vs 220v. 2. US dishwasher heating elements being limited to 800 or 1000 watts because many are designed to potentially share one 20A residential circuit with an oven and/or fridge due to possibly being retrofitted into a kitchen built before built-in dishwashers were standard and manufacturers not wanting to create different models for retrofit vs new installs.

[masklinn]

> share one 20A residential circuit

15, dishwasher manufacturers can't assume the dishwasher is on a 20.

[dylan604]

This plus the comment about sharing a circuit with an oven. If the oven is electric, even in the US it is 220v. If it is gas only, then it could be 120v as it only needs to run the igniter and other circuitry without running any heating elements.

[bcoates]

I think he said sharing a circuit with a fridge, which are generally 110 in the US -- i think this is how my apartment is wired (2-phase 30A to oven dedicated, one 20A for the whole rest of kitchen)

Trying to run a resistive heater on the same circuit as a fridge compressor without tripping leans towards very conservative wattage

[Scoundreller]

That's funny. Code in Ontario Canada is that the fridge needs to be on its own circuit. It's funny because we have an extra-big-ass inverter drive fridge that never draws more than an amp or two, even at startup because it's inherently soft-start.

Just a waste of copper and a beaker really.

[Johnny555]

>Just a waste of copper and a beaker really.

But also helps avoid the case where your coffee maker trips the breaker shared with your refrigerator and you don't notice until the food in the refrigerator is warm. (which was a risk in my previous apartment - the counter circuits were shared with the refrigerator). I think it makes sense to have it as a separate circuit.

[Scoundreller]

My thought was to share it with the lights, so you get an early indication if/when there is a fault than just your fridge going out.

> But also helps avoid the case where your coffee maker trips the breaker shared with your refrigerator and you don't notice until the food in the refrigerator is warm.

Didn’t notice the coffee was cold?

Overall, given the massive fears of a fridge failure, which can happen beyond just electrical failures, very very very few people have any kind of monitoring/alarming for this event. You’d think that would be the first requirement.

[bregma]

> counter circuits were shared with the refrigerator

Ouch. Code here (Ontario) is that not only does the fridge need a separate circuit, but counter outlets need two separate circuits: each socket on the duplex outlet is required to be on a separate circuit (although multiple outlets can all share the same two circuits, but you're supposed to alternate top and bottom).

Of course, if your home is older than I am or it's a handyman special, all bets are off. If I run the microwave while someone is vacuuming in another part of the house it'll trip the breaker.

[brewdad]

Good point. I haven’t tripped a GFCI in a long while but I don’t actually know if my fridge will lose power when I do trip the GFCI. My guess is that it will since it does have a water line and ice dispenser so probably requires being wired into the same circuit.

[matt-attack]

Refrigerators have become incredibly efficient in the last 40 years. I mean incredibly.

It sounds like this law is outdated.

[inferiorhuman]

Electric ovens in the US have required dedicated 40 or 50 amp circuits for decades per the NEC. Dishwashers, as well, have required dedicated circuits for a while but the 20 amp requirement is a more recent development (although it's probably been at least a couple decades).

Kitchens in general have required 20 amp general purpose circuits since at least the early 80s. However the NEC (but not the Canadian equivalent) allows for 15 amp duplex receptacles on 20 amp circuits so home builders looking to save a few pennies often use those. Besides, there are few if any, residential appliances out there that have NEMA 5-20 plugs. Then again hardwiring dishwashers was pretty common up until recently.

[fsckboy]

in traditional times it was customary to buy a few outfits high quality clothing that would last, and wear the same clothes for a week at a time, and then really boil them clean. This is the European market.

post world war 2 consumer choice culture in the US led to people buying cheaper clothing but varying their outfits every day and cleaning them (with copious availability of water) with less intensity.

once these patterns are established in the market, they become more like customary and it's what consumers expect of their appliances, detergents, etc.

[beerandt]

3) manufacturers placing energy star improvement quotas over safety in programming the cycles.

[lawlessone]

The energy star stuff isn't unique to US dishwashers though.