4 ms·

Good thing EU is all 220V :) Not sure what the standard current is for a circuit though (in the US the standard outlet is 120V 15A, although the Tesla charger u

Good thing EU is all 220V :) Not sure what the standard current is for a circuit though (in the US the standard outlet is 120V 15A, although the Tesla charger usually goes up to 12 A).

deleted 4y ago
[deleted]
matthewdgreen 4y ago
In the UK it’s 13A/230V, though some countries specify 10A. The amperage refers to peak draw, though. For continuous draw you typically get 80% of peak. So for example my 48A/240v charger requires a 60A breaker and 12A/120V continuous draw requires a 15A breaker. Also, since the input voltage must be converted to 480V (or more) there are greater conversion losses for 120V than 240V so the naive wattage calculation is a little misleading: less power reaches the battery in lower-voltage circuits.
Doxin 4y ago
basically all household circuits I've run into so far are 8A for older systems (think glass fuses in ceramic holders) and 16A for more modern systems. You'll semi-frequently run into 32A 2-phase circuits too, Usually for things like induction cooktops.
- iso1631 4y ago
  Is 2-phase really a thing in the EU? Very rare to have more than one phase in the UK, sure you'll get a 30A circuit for an oven (mine can theoretically draw about 20A if all 4 inductions, 3 ovens and the hotplate are on), and if you had an external garage/workshop you might even go as far as a 60A feed I guess, but none of that needs more than 1 phase.
  - Doxin 4y ago
    Generally it's two-out-of-three-phases. You don't need 48A outlets in domestic use generally, but you totally could. The way e.g. my induction cook top is wired up is two bog-standard 250V 16A circuits, each from a different phase. Both these circuits end up at a single socket which the cooktop plugs into. Amusing side effect of this arrangement is that it's possible for the breaker to trip on half the cook top, leaving the other half perfectly usable.
    - iso1631 4y ago
      But why are they two-phase? My single phase supply in the UK is 100A, of which I'm currently using 1.2. If I used all my sockets at their maximum rating I'd trip that 100A, but equally I could put an 80A circuit off this and draw 14kW to charge my car without worrying too much (other than the cost!) Is a typical supply 100A on each phase (so 300A total), or lower?
      - Doxin 4y ago
        The supply to the house itself is typically three-phase. Pretty much no appliance needs all three though, so you'll often see two-phase at the socket.
  - sam_lowry_ 4y ago
    Belgium has had 3*220V since 1950-ies, and is slowly switching towards 3*400V+N.

Good thing EU is all 220V :) Not sure what the standard current is for a circuit though (in the US the standard outlet is 120V 15A, although the Tesla charger usually goes up to 12 A).

deleted 4y ago

[deleted]

matthewdgreen 4y ago

In the UK it’s 13A/230V, though some countries specify 10A. The amperage refers to peak draw, though. For continuous draw you typically get 80% of peak. So for example my 48A/240v charger requires a 60A breaker and 12A/120V continuous draw requires a 15A breaker. Also, since the input voltage must be converted to 480V (or more) there are greater conversion losses for 120V than 240V so the naive wattage calculation is a little misleading: less power reaches the battery in lower-voltage circuits.

Doxin 4y ago

basically all household circuits I've run into so far are 8A for older systems (think glass fuses in ceramic holders) and 16A for more modern systems. You'll semi-frequently run into 32A 2-phase circuits too, Usually for things like induction cooktops.

iso1631 4y ago
Is 2-phase really a thing in the EU? Very rare to have more than one phase in the UK, sure you'll get a 30A circuit for an oven (mine can theoretically draw about 20A if all 4 inductions, 3 ovens and the hotplate are on), and if you had an external garage/workshop you might even go as far as a 60A feed I guess, but none of that needs more than 1 phase.
- Doxin 4y ago
  Generally it's two-out-of-three-phases. You don't need 48A outlets in domestic use generally, but you totally could. The way e.g. my induction cook top is wired up is two bog-standard 250V 16A circuits, each from a different phase. Both these circuits end up at a single socket which the cooktop plugs into. Amusing side effect of this arrangement is that it's possible for the breaker to trip on half the cook top, leaving the other half perfectly usable.
  - iso1631 4y ago
    But why are they two-phase? My single phase supply in the UK is 100A, of which I'm currently using 1.2. If I used all my sockets at their maximum rating I'd trip that 100A, but equally I could put an 80A circuit off this and draw 14kW to charge my car without worrying too much (other than the cost!) Is a typical supply 100A on each phase (so 300A total), or lower?
    - Doxin 4y ago
      The supply to the house itself is typically three-phase. Pretty much no appliance needs all three though, so you'll often see two-phase at the socket.
- sam_lowry_ 4y ago
  Belgium has had 3*220V since 1950-ies, and is slowly switching towards 3*400V+N.