On 12 November 2011 04:27, Dave e...@dc9.tzo.com wrote:
On 11/11/2011 11:29 AM, andy pugh wrote:
What would be illegal in the UK?
Thinking about it, not what I said, I think.
I think the regulations I was thinking of (part P) only apply to fixed
installations, and we can still do anything we
Brian,
if you use two legs of your incoming mains for a single phase supply,
you will have two hot wires in these appliances plus an uncommon
voltage. Using one hot leg plus neutral you will have a much safer
supply with an usual voltage (for the US). Two hot legs means all
switches must be
On 11 November 2011 09:25, Peter Blodow p.blo...@dreki.de wrote:
In Germany (and most european countries, i think), any electrician
installing a three phase supply without neutral and protective earth
would be kicked out of business by law for life time instantly.
3P + E outlets are perfectly
Sent from my iPod
On Nov 10, 2011, at 10:30 PM, Dave e...@dc9.tzo.com wrote:
Usually bigger 3 phase machines being fed with 480 volts or so will only
have the 3 phases run to the machine without a neutral wire.
The reason being that Line to Neutral on a 480 volt system is 277 volts
and
On 11 November 2011 12:11, Brian May bri...@diezorlich.com wrote:
What is meant by bonded to the ground? Does that mean connecting the
nuetral leg of the transformer to the ground? If so, why use the transformer
at all when i can just go from a leg to ground?
Because that merely
-Original Message-
From: Brian May [mailto:bri...@diezorlich.com]
Sent: Friday, November 11, 2011 7:12 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] 3 phase power
snip
What is meant by bonded to the ground? Does that mean
connecting the nuetral leg
On 11/11/2011 7:11 AM, Brian May wrote:
What is meant by bonded to the ground? Does that mean connecting the
nuetral leg of the transformer to the ground? If so, why use the transformer
at all when i can just go from a leg to ground?
If the 3 phase service is fed from a delta
On 11/11/2011 9:37 AM, Dave wrote:
On 11/11/2011 7:11 AM, Brian May wrote:
What is meant by bonded to the ground? Does that mean connecting
the nuetral leg of the transformer to the ground? If so, why use the
transformer at all when i can just go from a leg to ground?
If the 3 phase
Brian,
looking at your questions I get the feeling that you are a bloody
beginner as far as power electricity is concerned. I get the scares
imagining what you could possibly do to yourself and others,
experimenting with your mains supply. It would be much safer for you and
would calm my
Andy,
hereabouts, you can't even buy outlets or plugs with only 4 leads. Also,
I wouldn't know where to buy a 4 lead power cable. It's 3 or 5.
Another thing (but don't tell Brian): in case your motor, 3 phase
connected, is wired in wye (star), you have a virtual zero, the common
central tap of
On Fri, Nov 11, 2011 at 10:01 AM, Peter Blodow p.blo...@dreki.de wrote:
Brian,
looking at your questions I get the feeling that you are a bloody
beginner as far as power electricity is concerned. I get the scares
imagining what you could possibly do to yourself and others,
experimenting with
On 11 November 2011 16:13, Peter Blodow p.blo...@dreki.de wrote:
hereabouts, you can't even buy outlets or plugs with only 4 leads.
That seems a bit strange. What do you connect the neutral to, if there
is no external star point on a motor. for example?
A typical VFD, for example, has nowhere
On 11 November 2011 16:22, Brian May bri...@do-precision.com wrote:
Yes I am a beginner at power electronics. That is why I am asking the
question. I am reading what I can and asking different people before I do
anything. I am in no hurry and not planning to wire anything until I
Brian,
power electrics is not a subject to learn by reading a few books. It's a
craft. In order to get a licence here in Germany, you have to be an
apprentice for three years and a fellow (? Geselle in German) for
another few years. After this and only if you have delivered a master
piece to
On Friday, November 11, 2011 11:28:02 AM Peter Blodow did opine:
Brian,
looking at your questions I get the feeling that you are a bloody
beginner as far as power electricity is concerned. I get the scares
imagining what you could possibly do to yourself and others,
experimenting with your
Yes, you are probably right, I will look for a local professional guy to
come and get things going. At least I have an idea of what is
happening...
Thanks for the advice
On Fri, Nov 11, 2011 at 10:54 AM, gene heskett ghesk...@wdtv.com wrote:
On Friday, November 11, 2011 11:28:02 AM Peter
andy pugh schrieb:
On 11 November 2011 16:13, Peter Blodow p.blo...@dreki.de wrote:
hereabouts, you can't even buy outlets or plugs with only 4 leads.
That seems a bit strange. What do you connect the neutral to, if there
is no external star point on a motor. for example?
When
Very good idea! And if you want to learn something, this guy will be the
right one to ask your questions to. He will know local regulations and
hopefuly tell you what is doing, just ask a few holes in his stomach, as
we say.
Gene, you made some experience the hard way (no envy), which I didn't
andy pugh wrote:
On 11 November 2011 09:25, Peter Blodow p.blo...@dreki.de wrote:
In Germany (and most european countries, i think), any electrician
installing a three phase supply without neutral and protective earth
would be kicked out of business by law for life time instantly.
On Friday, November 11, 2011 11:58:11 AM andy pugh did opine:
On 11 November 2011 16:22, Brian May bri...@do-precision.com wrote:
Yes I am a beginner at power electronics. That is why I am asking the
question. I am reading what I can and asking different people before
I do anything. I
On Friday, November 11, 2011 12:38:29 PM Peter Blodow did opine:
Very good idea! And if you want to learn something, this guy will be the
right one to ask your questions to. He will know local regulations and
hopefuly tell you what is doing, just ask a few holes in his stomach, as
we say.
On 11/11/2011 03:25 AM, Peter Blodow wrote:
Brian,
Here in Germany, all electrical supply, home and industry, is done with
three phase current plus neutral. For single phase use, like for
apartments, the three phases are split up and each apartment or room
gets one hot leg plus neutral (plus
Hello Karl,
the general installation for small houses, like one family buildings or
small shops, if made new or repaired, is a 3 phase four lead underground
cable, fused with 50 A where it enters the building, coming up from the
ground at the edge of the houses wall. In our case, rather
On Friday, November 11, 2011 05:18:26 PM Peter Blodow did opine:
Hello Karl,
the general installation for small houses, like one family buildings or
small shops, if made new or repaired, is a 3 phase four lead underground
cable, fused with 50 A where it enters the building, coming up from
On 11/11/2011 11:29 AM, andy pugh wrote:
That would be illegal in the UK.
Just one of many laws I flout on a regular basis.
What would be illegal in the UK?
Dave
--
RSA(R) Conference 2012
Save $700 by Nov 18
Brian,
If you work at some industrial facility or know someone who does, try
and find an industrial electrician to help you out. Oftentimes they
will not be a licensed electrician as they are not a contractor. They
may, or may not have a journeyman's card, depending on their background.
This is probably an easy question for alot af the people on the list.
I have 3 phase power going to my vfd on my machine. I want to the use that
same power to power all the 120 single phase components. (the dc power supply
for the steppers and varios other motors. ). This way i only need 1
the lights and most outlets here at work are single phase wired off of 3
phase.
On Thu, Nov 10, 2011 at 9:50 PM, Brian May bri...@diezorlich.com wrote:
This is probably an easy question for alot af the people on the list.
I have 3 phase power going to my vfd on my machine. I want to the use
Yes everything at our shop is wired off 3 phase. But our box has a nuetral. So
it goes from leg to nuetral. However my machine only has 4 lines - the 3 legs
of power and an earth ground. So i guess my question is do i need the nuetral?
Sent from my iPod
On Nov 10, 2011, at 8:59 PM, Eric Keller
On 11/10/2011 06:50 PM, Brian May wrote:
This is probably an easy question for alot af the people on the
list.
I have 3 phase power going to my vfd on my machine. I want to the
use that same power to power all the 120 single phase components.
(the dc power supply for the steppers and varios
On 11/10/2011 08:50 PM, Brian May wrote:
This is probably an easy question for alot af the people on the list.
I have 3 phase power going to my vfd on my machine. I want to the use that
same power to power all the 120 single phase components. (the dc power supply
for the steppers and
Ok that makes sense.
Just out of curiosity, How do other machines do it. Our other cnc machines only
have the 3 lines and earth ground running into them...
Sent from my iPod
On Nov 10, 2011, at 9:01 PM, Brian Mihulka bmihu...@hulkster.net wrote:
On 11/10/2011 08:50 PM, Brian May wrote:
: Thursday, November 10, 2011 9:27 PM
Subject: Re: [Emc-users] 3 phase power
Ok that makes sense.
Just out of curiosity, How do other machines do it. Our other cnc machines only
have the 3 lines and earth ground running into them...
Sent from my iPod
On Nov 10, 2011, at 9:01 PM, Brian Mihulka bmihu
Usually bigger 3 phase machines being fed with 480 volts or so will only
have the 3 phases run to the machine without a neutral wire.
The reason being that Line to Neutral on a 480 volt system is 277 volts
and that is not very useful for anything other than lighting.
To get 120 VAC, two of the
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