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Thread: 3 phase plugs - 4 or 5 pin
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14th June 2006, 05:20 PM #16Novice
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4 pin doesnt have an earth, if i can remember correctly
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14th June 2006, 07:34 PM #17Woodworker
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Originally Posted by gregoryq
But no it didn't fit without some modification. I'm in the process at the moment of getting the pulley drilled out (from 19mm to 25mm) for the new shaft, and I have to make up some adaptors to bolt on the new motor to the Unisaw trunnion. Alas, no Baldors here; the original "Delta" motor is made by Marathon Electrics, and it is a beauty (despite the wrong winding). Got any advice on what I should do with it? I was thinking about making a spindle sander or something similar that might not take too much grunt to overheat it again?? Regards
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15th June 2006, 12:15 AM #18
The 4 pin plug has no neutral.
three phase motors are (generaly) smaller, cheaper, hve less to go wrong with them than an equavelent single phane motor.Any thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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15th June 2006, 05:06 PM #19Novice
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My bad, lol yer ur right, No Neutral
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7th July 2006, 10:52 PM #20
Not having an electrician handy to ask this, does anybody know if it is possible & legal to have both 3 phase outlets & 1 phase outlets sharing the SAME 3 phase circtuit, or do you have to separate them into different circuits? I am assuming that you would wire up the 1 phase outlet using any 1 of the 3 hot wires available in the circuit.
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7th July 2006, 11:13 PM #21
:eek: :eek:
You certainly can not have mixed single phase and 3 phase outlets on the same breaker / circuit.
While this is an over simplifacation of the regs this is the way it should be.
any single phase 15 amp or over, one outlet, one breaker.
any three phase one outlet, one isolator, one breaker.
cheersAny thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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7th July 2006, 11:43 PM #22
Thanks Soundman, knew I could rely on you.
By the way, do you happen to have the clause number from the Australian Standards where it talks about the number of three phase outlets on a circuit?
I have read the wiring rules during a very basic intro electricians course years ago (we didn't cover three phase, but I am an expert in single phase ), but can't recall reading any rules about three phase in there. I still have got a copy, so can look it up.
And besides the legal requirements for number of GPOs on a circuit etc, could it theoretically be done?
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7th July 2006, 11:45 PM #23Senior Member
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Originally Posted by FlyingDuck
to finally answer your question, it wouldn't all be on one circuit but it could all be provided from one switchboard.
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8th July 2006, 12:05 AM #24Originally Posted by LuckyDuck
Greg
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8th July 2006, 12:14 AM #25
Hi Greg, I think you may have just posted that in the wrong thread???
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8th July 2006, 12:21 AM #26
[quote In terms of circuit breakers and switchboards, they three phase circuits would all be protected by three phase circuit breakers and the single phase circuits would be protected by single phase circuit breakers. quote]
Yes, that is of course the way it would actually be done - I would not contemplate mxing them up in reality. But I am still curious if it would be theoretically possible to take one of the actives, the N & E from a three phase circuit and use them for a 240V single phase outlet. There is suppossed to be 240V between any one active & N, so that should work. Might be problems in sharing the N though.
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8th July 2006, 12:23 AM #27
I think that quote was from last week, referencing some off-topic aspect of this thread. LuckyDuck has a left-over single phase motor of good pedigree that's looking for a new job, hence the comment.
Greg
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8th July 2006, 12:25 AM #28Originally Posted by FlyingDuck
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8th July 2006, 10:58 AM #29Senior Member
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Originally Posted by FlyingDuck
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8th July 2006, 11:14 AM #30
[QUOTE=thatirwinfella]
Originally Posted by FlyingDuck
Greg
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