NEMA 14-30 Voltage

[friarluck]

My home has a 220v 30amp breaker, but Tesla recommends a 240v 30amp breaker for the NEMA 14-30. Does this difference in voltage matter?

 

[EVDRVN]

My home has a 220v 30amp breaker, but Tesla recommends a 240v 30amp breaker for the NEMA 14-30. Does this difference in voltage matter?

There is no such thing as 220V residential in the US except in a few rare cases since WW2. Is this an existing circuit to a different outlet? Unless the breaker/outlet is in poor/worn/aged condition you should be fine.

 

[iluvmacs]

Does it literally say 220V on it? That would be really unusual. Many people (incorrectly) refer to 240V service in the US as 220V.

In any case, the answer is "no" either way. It will happily take anywhere from about 200V-265V.

 

[Rocky_H]

There is no 220V; that's just some old terminology from a century ago that grandpas still say. All residential electric in the U.S. is actually 240V.

Industrial commercial buildings have a bit different system that ends up having 208V as their higher version (don't need to get into why), but the breakers and other equipment can be used for that interchangeably on the 208V or 240V stuff.

 

[EVDRVN]

Does it literally say 220V on it? That would be really unusual. Many people (incorrectly) refer to 240V service in the US as 220V.

In any case, the answer is "no" either way. It will happily take anywhere from about 200V-265V.

That's not unusual at all. No less than the majority of people here that say 110/220 over and over even after being corrected

 

[Rocky_H]

That's not unusual at all. No less than the majority of people here that say 110/220 over and over even after being corrected

I wish I had a "sad" reaction for this forum and a "dislike/disagree" reaction for Facebook.

 

[Runt8]

That's not unusual at all. No less than the majority of people here that say 110/220 over and over even after being corrected

It would be unusual if the breaker said 220 on it.

 

[EVDRVN]

It would be unusual if the breaker said 220 on it.

Why? I see them frequently.

 

[Sophias_dad]

In any case, to the OP, it doesn't matter. The car doesn't care at all, whether the voltage is 183 through 283 for sure, and probably an even wider range.

 

[MXLRplus]

It should work from 200v to 265v. The big question that nobody can seem to answer is if it will work up to 290v (277v commercial power).
Teslas used to support 277v for HPWC installations. Do they still? Nobody seems to know.

 

[Sophias_dad]

It should work from 200v to 265v. The big question that nobody can seem to answer is if it will work up to 290v (277v commercial power).
Teslas used to support 277v for HPWC installations. Do they still? Nobody seems to know.

Gen2 does work up to around 290 or beyond, although 277 support was removed from the manual in later revisions. I don't know about Gen3, but I bet it doesn't 'officially' support 277 either.

 

[Sophias_dad]

Gen2 does work up to around 290 or beyond, although 277 support was removed from the manual in later revisions. I don't know about Gen3, but I bet it doesn't 'officially' support 277 either.

Gen3 manual says 'nominal 200-240V'

 

[Runt8]

Why? I see them frequently.

Wait, you see 220v residential breakers in the US? Please explain.

 

[EVDRVN]

Wait, you see 220v residential breakers in the US? Please explain.

In breaker panels, just like the OP posted. Many devices in the US are also marked 110V as well. I'm pretty sure those were not made around WW2.

 

[Runt8]

In breaker panels, just like the OP posted. Many devices in the US are also marked 110V as well. I'm pretty sure those were not made around WW2.

I've seen devices with all sorts of voltages. And more often than not people quote the wrong voltage when discussing it. But I've never seen an actual circuit breaker marked 220v.

 

[iluvmacs]

Indeed, it's basically okay if an appliance says it's rated for 110V or 220V, but if the protective device has that rating, it would actually be against code to use it on a standard 120V/240V service!