I have a 5 HP, 1989 Craftsman Air Compressor (Model NO. 919.176851).
It's a 240 Voltage Single Phase motor made by General Electric. My
question is: can I convert this to a 110v use by changing the
plug-cord assembly only? Will this motor run on 110v without damage
to it? Or am I stuck with having to stay with the 220v configuration.

Thanks,

Oren
"My doctor says I have a malformed public-duty gland
and a natural deficiency in moral fiber, and that I am therefore
excused from saving Universes."

If the motor gives dual voltage on the name plate, then you can. If not,
then you can't.

"Oren" wrote in message
...
I have a 5 HP, 1989 Craftsman Air Compressor (Model NO. 919.176851).
It's a 240 Voltage Single Phase motor made by General Electric. My
question is: can I convert this to a 110v use by changing the
plug-cord assembly only? Will this motor run on 110v without damage
to it? Or am I stuck with having to stay with the 220v configuration.

Thanks,

Oren
"My doctor says I have a malformed public-duty gland
and a natural deficiency in moral fiber, and that I am therefore
excused from saving Universes."

"Oren" wrote in message
...
I have a 5 HP, 1989 Craftsman Air Compressor (Model NO. 919.176851).
It's a 240 Voltage Single Phase motor made by General Electric. My
question is: can I convert this to a 110v use by changing the
plug-cord assembly only? Will this motor run on 110v without damage
to it? Or am I stuck with having to stay with the 220v configuration.

Thanks,

Oren
"My doctor says I have a malformed public-duty gland
and a natural deficiency in moral fiber, and that I am therefore
excused from saving Universes."

Unless the motor is dual voltage your stuck with 240 v. There are motors
that can have the interior wiring configuration changed or the taps where
the wires land are set up for dual voltage. Read the name plate and then
google the motor.

I am amazed that you thought that changing the plug would even work.
Sorta like changing the tires on a pinto and getting a T-bird.

"Oren" wrote in message
...
I have a 5 HP, 1989 Craftsman Air Compressor (Model NO. 919.176851).
It's a 240 Voltage Single Phase motor made by General Electric. My
question is: can I convert this to a 110v use by changing the
plug-cord assembly only? Will this motor run on 110v without damage
to it? Or am I stuck with having to stay with the 220v configuration.

Thanks,

Oren
"My doctor says I have a malformed public-duty gland
and a natural deficiency in moral fiber, and that I am therefore
excused from saving Universes."

The nameplate on the motor is the place to look. Some motors are dual
voltage and the nameplate will have a wiring diagram or other information
about how to change the voltage. Simply plugging a motor set for 240 volts
into a 120 volt outlet will not work. It won't be able to put out the power
needed to operate the compressor -- if it starts at all.

TKM

Real 5hp motors couldn't be run on 120v. Well, they could, but would draw
50a...
If this is a craftsman 5hp 6a motor, you probably can convert it. The
directions will be either on the motor itself, or under a cover where the
plug is attached. Normally convertable motors will give the amperage at
both voltages on the nameplate.
"Oren" wrote in message
...
I have a 5 HP, 1989 Craftsman Air Compressor (Model NO. 919.176851).
It's a 240 Voltage Single Phase motor made by General Electric. My
question is: can I convert this to a 110v use by changing the
plug-cord assembly only? Will this motor run on 110v without damage
to it? Or am I stuck with having to stay with the 220v configuration.

Thanks,

Oren
"My doctor says I have a malformed public-duty gland
and a natural deficiency in moral fiber, and that I am therefore
excused from saving Universes."

On Thu, 12 Jan 2006 09:59:09 -0700, "SQLit" wrote:


Sorta like changing the tires on a pinto and getting a T-bird.

Maybe you could get a T-pinto?



Remove NOPSAM to email me. Please let
me know if you have posted also.

"Oren" wrote in message
...
I have a 5 HP, 1989 Craftsman Air Compressor (Model NO. 919.176851).
It's a 240 Voltage Single Phase motor made by General Electric. My
question is: can I convert this to a 110v use by changing the
plug-cord assembly only? Will this motor run on 110v without damage
to it? Or am I stuck with having to stay with the 220v configuration.

Halving the volts will double the amps. You will need a special circuit to
handle the load as it will pull far more than normal house circuits can
handle. . There is no benefit to change it over and many reasons to leave
it at 220.

The motor may or may not be capable of running on 120V. You have to check
the nameplate for specifications and the wiring that has to be changed
internally.

On Thu, 12 Jan 2006 17:33:28 GMT, "Toller" wrote:

Real 5hp motors couldn't be run on 120v. Well, they could, but would draw
50a...
If this is a craftsman 5hp 6a motor, you probably can convert it. The
directions will be either on the motor itself, or under a cover where the
plug is attached. Normally convertable motors will give the amperage at
both voltages on the nameplate.

I've checked the motor plate:

It's a one speed motor v230, 60 Hz and 13.1 A (Amps?) . There is no
mention of "dual voltage".

I did find a diagram under the switch housing, but nothing to indicate
capability to wire another configuration. It (reminded me of the
wiring for a GFCI) had - lines IN (plug cord) and lines OUT (motor
cord).

The manual indicates a minimum branch circuit of 15 amps and " This
compressor can be operated on a 15 amp circuit if: voltage supply to
circuit is normal, circuit is not used to supply any other electrical
needs (lights, appliances, etc. ) and extension cords comply with
specifications".

It goes on that if these conditions cannot be met a 20 amp circuit may
be necessary. "It is not necessary to change the cord set if this
change is made".

Thanks,

Oren
"My doctor says I have a malformed public-duty gland
and a natural deficiency in moral fiber, and that I am therefore
excused from saving Universes."

"Oren" wrote in message
...

I've checked the motor plate:

It's a one speed motor v230, 60 Hz and 13.1 A (Amps?) . There is no
mention of "dual voltage".


It goes on that if these conditions cannot be met a 20 amp circuit may
be necessary. "It is not necessary to change the cord set if this
change is made".

You will have to leave it at 220 then. At 13A it is borderline as on
startup it will pull much more. If you don't have a circuit now, I'd size
it for 20A and be done with it.

On Fri, 13 Jan 2006 16:04:00 GMT, "Edwin Pawlowski"
wrote:

You will have to leave it at 220 then. At 13A it is borderline as on
startup it will pull much more. If you don't have a circuit now, I'd size
it for 20A and be done with it.

Thanks.... I guess it stays @ 220V.

Oren
"My doctor says I have a malformed public-duty gland
and a natural deficiency in moral fiber, and that I am therefore
excused from saving Universes."

replying to SQLit, Sam wrote:
Actually, some 240v motors can be safely run on 120 or 110, but would probably
lack the power necessary to start the motor turning from full stop. It would
be more like putting a little battery in a big truck. It might be able to bump
start, but it is doubtful that it would be able to turn over the engine due to
the lower voltage. So, in some cases, simply changing the plug and adding in a
manual pull start to turn the rotor will allow a 240v machine to operate
properly.. The problem lies with the phases of electricity you are getting.
240v is two alternating phases of 120v. it is possible to wire a 240v outlet
using 2 120v lines with opposite phases. A capacitor generally plays the
role of "bump starter" for 120v machines (by providing that second phase
emulating 240v electricity and turning the motor over the first time) and is
why the wiring needs to be changed. After that there is very little difference
in the performance of 240v and 120v. It is an instant at the start and matters
very little after that. Note, the same thing in reverse is not possible. If
you plug a 120v motor into a 240v outlet, then you will have and immediate and
serious problem. You should try to be less demeaning to others SQLit. There is
no point in being rude and condescending because someone isn't educated about
voltage and wiring.

--
for full context, visit https://www.homeownershub.com/mainte...0-v-79638-.htm

On 03/03/2017 12:44 PM, Sam wrote:
The problem lies with the phases of electricity you are getting.
240v is two alternating phases of 120v. it is possible to wire a 240v
outlet
using 2 120v lines with opposite phases.

You'll need one of those magic transformers that turns a single-phase
input on the primary into a two-phase output on the secondary.

In article ,
says...

replying to SQLit, Sam wrote:
Actually, some 240v motors can be safely run on 120 or 110, but would probably
lack the power necessary to start the motor turning from full stop. It would
be more like putting a little battery in a big truck. It might be able to bump
start, but it is doubtful that it would be able to turn over the engine due to
the lower voltage. So, in some cases, simply changing the plug and adding in a
manual pull start to turn the rotor will allow a 240v machine to operate
properly.. The problem lies with the phases of electricity you are getting.
240v is two alternating phases of 120v. it is possible to wire a 240v outlet
using 2 120v lines with opposite phases. A capacitor generally plays the
role of "bump starter" for 120v machines (by providing that second phase
emulating 240v electricity and turning the motor over the first time) and is
why the wiring needs to be changed. After that there is very little difference
in the performance of 240v and 120v. It is an instant at the start and matters
very little after that. Note, the same thing in reverse is not possible. If
you plug a 120v motor into a 240v outlet, then you will have and immediate and
serious problem. You should try to be less demeaning to others SQLit. There is
no point in being rude and condescending because someone isn't educated about
voltage and wiring.

--
for full context, visit https://www.homeownershub.com/mainte...0-v-79638-.htm

Outside of this being around 10 years old, the above is very
missinformed advice. The motor would be wired as a single phase 240
volt motor, not some kind of 2 phase 240 volts. I doubt that one would
be hard pressed to find any 2 phase in use in the US unless some very
old factory.

No point in being rude to you as you don't seem to be educated about
voltage and wiring.

On 03/03/2017 12:14 PM, #1 wrote:
On 03/03/2017 12:44 PM, Sam wrote:
The problem lies with the phases of electricity you are getting.
240v is two alternating phases of 120v. it is possible to wire a 240v
outlet
using 2 120v lines with opposite phases.

You'll need one of those magic transformers that turns a single-phase
input on the primary into a two-phase output on the secondary.


No transformer needed. TWO single-phase lines from the same source
(already 180 degrees out of phase, as needed here).

Now, maybe you can figure out how to get 3 phase.

On Fri, 3 Mar 2017 14:24:22 -0600, Sam E
wrote:

On 03/03/2017 12:14 PM, #1 wrote:
On 03/03/2017 12:44 PM, Sam wrote:
The problem lies with the phases of electricity you are getting.
240v is two alternating phases of 120v. it is possible to wire a 240v
outlet
using 2 120v lines with opposite phases.

You'll need one of those magic transformers that turns a single-phase
input on the primary into a two-phase output on the secondary.


No transformer needed. TWO single-phase lines from the same source
(already 180 degrees out of phase, as needed here).

Now, maybe you can figure out how to get 3 phase.


If it is a dual voltage motor (which most medium sised compressor
motors are) you just need to switch the wires in the motor and change
the plug. HOWEVER the compressor will require twice the amperage at
half the voltage, so unless it is smaller than 2 real horsepower it
will NOT run on a 15 amp circuit, and will quite likely trip a 20 amp
on starting. (which is why I switched MINE from 120 to 240 volts)

There is no "phase issue" at all. There is no such thing as "two
phase" power, at least not in common North American use. All 120 volt
power in north american distribution systems is derived from center
tapped 240 volt single phase transformers except in a 3 phase
distribution system, where you get 120 and 208 (120 across 1 phase,
and 208 across 2 phases of the 3 phase supply).

On 3/3/2017 3:24 PM, Sam E wrote:
On 03/03/2017 12:14 PM, #1 wrote:
On 03/03/2017 12:44 PM, Sam wrote:
The problem lies with the phases of electricity you are getting.
240v is two alternating phases of 120v. it is possible to wire a 240v
outlet
using 2 120v lines with opposite phases.

You'll need one of those magic transformers that turns a single-phase
input on the primary into a two-phase output on the secondary.


No transformer needed. TWO single-phase lines from the same source (already 180 degrees out of phase, as needed here).

Now, maybe you can figure out how to get 3 phase.



Here, it's either single-phase or 3-phase. No two-phase is available.

Single-phase 120/240 service is delivered from a standard ubiquitous center-tapped transformer.

The 3-phase wye service is 120/208 and the phases are 120 degrees apart.

On 3/3/17 4:28 PM, wrote:

There is no "phase issue" at all. There is no such thing as "two
phase" power, at least not in common North American use. All 120
volt power in north american distribution systems is derived from
center tapped 240 volt single phase transformers except in a 3 phase
distribution system, where you get 120 and 208 (120 across 1 phase,
and 208 across 2 phases of the 3 phase supply).

The REAs in rural Nebraska also supply three phase power to
irrigation well motors. I've seen center tap delta which is basically
double what you referenced. There is the Y configuration, 277 volts
each line to ground. Lastly is the corner ground delta. Two lines read
480 to
ground, the third line reads 0 to ground. All of those read 480 line
to line.
Some grain bin drying systems are wired with the three phase you
mentioned.
That lets the electricians use common 120 volt controls. There is also
enough
power with the three phase to run drying fans.

On Fri, 3 Mar 2017 18:37:52 -0600, Dean Hoffman
wrote:

On 3/3/17 4:28 PM, wrote:

There is no "phase issue" at all. There is no such thing as "two
phase" power, at least not in common North American use. All 120
volt power in north american distribution systems is derived from
center tapped 240 volt single phase transformers except in a 3 phase
distribution system, where you get 120 and 208 (120 across 1 phase,
and 208 across 2 phases of the 3 phase supply).

The REAs in rural Nebraska also supply three phase power to
irrigation well motors. I've seen center tap delta which is basically
double what you referenced. There is the Y configuration, 277 volts
each line to ground. Lastly is the corner ground delta. Two lines read
480 to
ground, the third line reads 0 to ground. All of those read 480 line
to line.
Some grain bin drying systems are wired with the three phase you
mentioned.
That lets the electricians use common 120 volt controls. There is also
enough
power with the three phase to run drying fans.
That is true - there are MANY other "industrial" voltages - and 3
phase Delta or wye .
However, in "residential" systems, except in some larger MURBs, it is
exclusively 120/240. In those MURBs, 120/208 3 phase..

All this "non-standard residential" has NOTHING to do with converting
a 240 volt compressor to 120 volts - because ALL 240 volt systems -
even in europe behave the same (with the exception it may be 50hz
instead of 60) and a motor connected for 220/240 will work on any 60hz
240 volt circuit. By reconfiguring for 120 volts it will require twice
the amperage. If, in the extremely unlikely case, the motor is 240
volts only and can not be reconfigured, the cheapest solution (and
simplest in most cases) is a replacement motor (assuming a belt driven
standard compressor - not too many 240 volt integrated oil-less
compressors on the north american market)
If this is a european market compressor brought to North America, all
bets are off.

On Fri, 3 Mar 2017 18:37:52 -0600, Dean Hoffman
wrote:

On 3/3/17 4:28 PM, wrote:

There is no "phase issue" at all. There is no such thing as "two
phase" power, at least not in common North American use. All 120
volt power in north american distribution systems is derived from
center tapped 240 volt single phase transformers except in a 3 phase
distribution system, where you get 120 and 208 (120 across 1 phase,
and 208 across 2 phases of the 3 phase supply).

The REAs in rural Nebraska also supply three phase power to
irrigation well motors. I've seen center tap delta which is basically
double what you referenced. There is the Y configuration, 277 volts
each line to ground. Lastly is the corner ground delta. Two lines read
480 to
ground, the third line reads 0 to ground. All of those read 480 line
to line.
Some grain bin drying systems are wired with the three phase you
mentioned.
That lets the electricians use common 120 volt controls. There is also
enough
power with the three phase to run drying fans.

I have also seen 240v 3p corner delta, usually feeding sewer lift
pumps. It is pretty strange the first time you see it because it is 3
phase with only 2 ungrounded conductors so it looks like single phase.
(2 black wires and a white on a 2 pole breaker)

On Sat, 04 Mar 2017 00:02:06 -0500, wrote:

On Fri, 3 Mar 2017 18:37:52 -0600, Dean Hoffman
wrote:

On 3/3/17 4:28 PM, wrote:

There is no "phase issue" at all. There is no such thing as "two
phase" power, at least not in common North American use. All 120
volt power in north american distribution systems is derived from
center tapped 240 volt single phase transformers except in a 3 phase
distribution system, where you get 120 and 208 (120 across 1 phase,
and 208 across 2 phases of the 3 phase supply).

The REAs in rural Nebraska also supply three phase power to
irrigation well motors. I've seen center tap delta which is basically
double what you referenced. There is the Y configuration, 277 volts
each line to ground. Lastly is the corner ground delta. Two lines read
480 to
ground, the third line reads 0 to ground. All of those read 480 line
to line.
Some grain bin drying systems are wired with the three phase you
mentioned.
That lets the electricians use common 120 volt controls. There is also
enough
power with the three phase to run drying fans.

I have also seen 240v 3p corner delta, usually feeding sewer lift
pumps. It is pretty strange the first time you see it because it is 3
phase with only 2 ungrounded conductors so it looks like single phase.
(2 black wires and a white on a 2 pole breaker)
With 3 phase motors? Requires 4 wires for a 3 phase motor on corner
delta. Sounds more like single phase 208. - because theree are
generally only 2 ungrounded wires in a corner delta (which is no
longer allowed, to the best of my knowlege, in Ontario) - and with
corner delta 3 phase you have no 120 without a transformer - and
generally no center-tapped transformer is used (which is generally why
grounded delta was used - to avoid the requirement for a more
expensive center tapped transformer) Means you can't use a 240 device
that has 120 volt controls without installing a "control transformer"
on each device.to supply the required 120 volts.

On Sat, 04 Mar 2017 01:18:19 -0500, wrote:

On Sat, 04 Mar 2017 00:02:06 -0500, wrote:

On Fri, 3 Mar 2017 18:37:52 -0600, Dean Hoffman
wrote:

On 3/3/17 4:28 PM, wrote:

There is no "phase issue" at all. There is no such thing as "two
phase" power, at least not in common North American use. All 120
volt power in north american distribution systems is derived from
center tapped 240 volt single phase transformers except in a 3 phase
distribution system, where you get 120 and 208 (120 across 1 phase,
and 208 across 2 phases of the 3 phase supply).

The REAs in rural Nebraska also supply three phase power to
irrigation well motors. I've seen center tap delta which is basically
double what you referenced. There is the Y configuration, 277 volts
each line to ground. Lastly is the corner ground delta. Two lines read
480 to
ground, the third line reads 0 to ground. All of those read 480 line
to line.
Some grain bin drying systems are wired with the three phase you
mentioned.
That lets the electricians use common 120 volt controls. There is also
enough
power with the three phase to run drying fans.

I have also seen 240v 3p corner delta, usually feeding sewer lift
pumps. It is pretty strange the first time you see it because it is 3
phase with only 2 ungrounded conductors so it looks like single phase.
(2 black wires and a white on a 2 pole breaker)

With 3 phase motors? Requires 4 wires for a 3 phase motor on corner
delta. Sounds more like single phase 208. - because theree are
generally only 2 ungrounded wires in a corner delta (which is no
longer allowed, to the best of my knowlege, in Ontario) - and with
corner delta 3 phase you have no 120 without a transformer - and
generally no center-tapped transformer is used (which is generally why
grounded delta was used - to avoid the requirement for a more
expensive center tapped transformer) Means you can't use a 240 device
that has 120 volt controls without installing a "control transformer"
on each device.to supply the required 120 volts.

They used corner delta because the only load is the motor and a 240v
MCC. There is no 120 available and it is not needed. The 4 wires are 2
hots, one neutral (another phase) and the grounding conductor. It
looks visually exactly like 120/240 single phase except that the
"neutral" is actually tied to the 3d phase, not the center tap of a
transformer. In fact they did it with just 2 transformers similar to
the way they do center tapped delta vee. (red leg delta)
The advantage of corner delta to the installer is they can use cheaper
2 pole switch gear. The only added requirement is everything needs to
be 240v rated (delta rated breakers)