20 Apr
1999
20 Apr
'99
4:15 p.m.
> Also you schould _not_ connect your
'ground' (which is in fact a phase)
> at the outlet to Protective Ground ('Short Grounding') but rather use
> your real PG.
Why not? In the UK, it's very common (required?)
for almost all metalwork
(water pipes, etc) to be bonded to the mains electrical earth as well.
You mustn't connect neutral to earth at any point (except as part of a
PME installation), though.
Jep, same here, but I was refering to his US installation to get 230 V
> Second is about the 220 between two phases: in
the US is, AFAIK, 115V is the
> standard voltage (with an upper limit of 120) which comes to 200V (208V),
> and not 220 - and 200 is definitive to low to drive 230V (240V) equippment.
> Not even the old standard 220V Eq will run properly in all cases.
No. The US mains is 234V centre-tapped. It's not
part of a 3-phase system
(at least not normally) - the 2 live wires are 180 degrees out of phase.
So you do get 234V by connecting to the 2 hot wires.
Realy 234V (strange) and 180 degree ? Where do you know ? By definition ?
Just remember, if you tap between 2 phases of a 3~ signal you still get
a perfect sinus and you can't decide if it is a single phase or part of
a 3 phase signal. Ok, I'm always learning new things on this earth :9
The numbers just saemed to fit well.
Gruss
H.
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HRK