In alt.engineering.electrical Daniel Who Wants to Know wrote:

| Yes like my Amana commercial RadarRange which is 4KW in 2.2KW out and has 3
| HV magnetrons along with 3 each of the other necessary items (cap, diode,
| etc.). It even has a current transformer that tells the control board via
| current draw when the magnetrons are warmed up so that the timer doesn't
| start counting down until it is actually cooking. It has a standard NEMA
| 6-20 plug on it now and will pop a bag of popcorn in roughly 75 seconds
| without scorching it. I can tell you it sure beats the hell out of regular
| microwave ovens for most things. The only thing I still use the regular one
| for are items that involve liquids as the Amana tends to make them either
| boil over or boils out all of the water before the food is cooked.

Will it operate on single phase power, like I have in my home?

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| Phil Howard KA9WGN (email for humans: first name in lower case at ipal.net) |

wrote in message
...
In alt.engineering.electrical Daniel Who Wants to Know
wrote:

| Yes like my Amana commercial RadarRange which is 4KW in 2.2KW out and
has 3
| HV magnetrons along with 3 each of the other necessary items (cap,
diode,
| etc.). It even has a current transformer that tells the control board
via
| current draw when the magnetrons are warmed up so that the timer doesn't
| start counting down until it is actually cooking. It has a standard
NEMA
| 6-20 plug on it now and will pop a bag of popcorn in roughly 75 seconds
| without scorching it. I can tell you it sure beats the hell out of
regular
| microwave ovens for most things. The only thing I still use the regular
one
| for are items that involve liquids as the Amana tends to make them
either
| boil over or boils out all of the water before the food is cooked.

Will it operate on single phase power, like I have in my home?


Considering a NEMA 6-20 plug only has the 2 hot prongs plus ground and the
cord is a 14-3 AWG with one conductor being ground, yes it is single phase.
:-)

In alt.engineering.electrical Daniel Who Wants to Know wrote:
| wrote in message
| ...
| In alt.engineering.electrical Daniel Who Wants to Know
| wrote:
|
| | Yes like my Amana commercial RadarRange which is 4KW in 2.2KW out and
| has 3
| | HV magnetrons along with 3 each of the other necessary items (cap,
| diode,
| | etc.). It even has a current transformer that tells the control board
| via
| | current draw when the magnetrons are warmed up so that the timer doesn't
| | start counting down until it is actually cooking. It has a standard
| NEMA
| | 6-20 plug on it now and will pop a bag of popcorn in roughly 75 seconds
| | without scorching it. I can tell you it sure beats the hell out of
| regular
| | microwave ovens for most things. The only thing I still use the regular
| one
| | for are items that involve liquids as the Amana tends to make them
| either
| | boil over or boils out all of the water before the food is cooked.
|
| Will it operate on single phase power, like I have in my home?
|
|
| Considering a NEMA 6-20 plug only has the 2 hot prongs plus ground and the
| cord is a 14-3 AWG with one conductor being ground, yes it is single phase.

Don't be so quick to jump to conclusions. The NEMA 6-XX series gets used for
both the 208 volt 120 degree and the 240 volt 180 degree 2-wire connections.
Some devices work on one and not the other. You CAN derive three phase from
one and not the other. A motor could be wired to use that angular difference
(with the neutral) to achieve a motor starting direction instead of having a
capacitor to change the angle on a shaded pole.

Also, if the supply is 208 volts then the maximum power available is 4157 watts
(3326 under the 80% rule), whereas with 240 volts it is 4800 (3840 under 80%).

240 volts is a 15.47% increase over 208 volts. 277 volts is a 15.47% increase
over 240 volts. Can either of those be substituted for 240 volts easily?

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|WARNING: Due to extreme spam, googlegroups.com is blocked. Due to ignorance |
| by the abuse department, bellsouth.net is blocked. If you post to |
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| Phil Howard KA9WGN (email for humans: first name in lower case at ipal.net) |

wrote in message
...

Don't be so quick to jump to conclusions. The NEMA 6-XX series gets used
for
both the 208 volt 120 degree and the 240 volt 180 degree 2-wire
connections.
Some devices work on one and not the other. You CAN derive three phase
from
one and not the other. A motor could be wired to use that angular
difference
(with the neutral) to achieve a motor starting direction instead of having
a
capacitor to change the angle on a shaded pole.

Also, if the supply is 208 volts then the maximum power available is 4157
watts
(3326 under the 80% rule), whereas with 240 volts it is 4800 (3840 under
80%).

240 volts is a 15.47% increase over 208 volts. 277 volts is a 15.47%
increase
over 240 volts. Can either of those be substituted for 240 volts easily?

--
|WARNING: Due to extreme spam, googlegroups.com is blocked. Due to
ignorance |
| by the abuse department, bellsouth.net is blocked. If you post
to |
| Usenet from these places, find another Usenet provider ASAP.
|
| Phil Howard KA9WGN (email for humans: first name in lower case at
ipal.net) |

In this specific application the third prong is used only as a chassis
ground connection as everything including the light bulb is 230V. Also I am
no expert here but I think intermittent loads can exceed the 80% rule hence
the 14 gauge cord which would normally only be good for 15 amps but is
protected by a 20 amp fuse inside the oven and a 20 amp double pole circuit
breaker in the service panel. The NM-B (Romex) I used is 12-3 with ground
and has the white neutral conductor simply capped but not connected at
either end.

Daniel Who Wants to Know wrote:

Also I am
no expert here but I think intermittent loads can exceed the 80% rule hence
the 14 gauge cord which would normally only be good for 15 amps but is
protected by a 20 amp fuse inside the oven and a 20 amp double pole circuit
breaker in the service panel.
..
The US NEC allows about any cord of 2 conductors (not including ground)
to be used at 18A. Most (all?) cords with type starting H (hard use) can
be used at 20A.

The 80% rule is for continuous loads - over 3 hours.

--
bud--

In alt.engineering.electrical bud-- wrote:
| Daniel Who Wants to Know wrote:
|
| Also I am
| no expert here but I think intermittent loads can exceed the 80% rule hence
| the 14 gauge cord which would normally only be good for 15 amps but is
| protected by a 20 amp fuse inside the oven and a 20 amp double pole circuit
| breaker in the service panel.
| .
| The US NEC allows about any cord of 2 conductors (not including ground)
| to be used at 18A. Most (all?) cords with type starting H (hard use) can
| be used at 20A.
|
| The 80% rule is for continuous loads - over 3 hours.

Like a computer?

--
|WARNING: Due to extreme spam, googlegroups.com is blocked. Due to ignorance |
| by the abuse department, bellsouth.net is blocked. If you post to |
| Usenet from these places, find another Usenet provider ASAP. |
| Phil Howard KA9WGN (email for humans: first name in lower case at ipal.net) |

"bud--" wrote in message
.. .
Daniel Who Wants to Know wrote:

Also I am no expert here but I think intermittent loads can exceed the
80% rule hence the 14 gauge cord which would normally only be good for 15
amps but is protected by a 20 amp fuse inside the oven and a 20 amp
double pole circuit breaker in the service panel.
.
The US NEC allows about any cord of 2 conductors (not including ground) to
be used at 18A. Most (all?) cords with type starting H (hard use) can be
used at 20A.

"for short period and with limited lenght"


The 80% rule is for continuous loads - over 3 hours.

--
bud--

A. K. SEPUT wrote:
"bud--" wrote in message
.. .
Daniel Who Wants to Know wrote:
Also I am no expert here but I think intermittent loads can exceed the
80% rule hence the 14 gauge cord which would normally only be good for 15
amps but is protected by a 20 amp fuse inside the oven and a 20 amp
double pole circuit breaker in the service panel.
.
The US NEC allows about any cord of 2 conductors (not including ground) to
be used at 18A. Most (all?) cords with type starting H (hard use) can be
used at 20A.

"for short period and with limited lenght"
..
I see neither limitation in the US NEC.
..
The 80% rule is for continuous loads - over 3 hours.


--
bud--