search  current discussion  categories  kilns & firing - elements

## modifying elements

### Chaeli Sullivan on mon 10 aug 09

Quick question:
Inside an AH6 Amaco kiln there are 4 sets of side elements and 2 on the bot=
=3D
tom. Originally, they were all wired together to make a 3 phase, 208 volt k=
=3D
iln.
Someone offered me this ancient beasti and my thoughts were: instead of try=
=3D
ing to build a kiln from scratch, why not just remodel this one ( hadn't a =
=3D
clue at the time that it was a 3-phase). This puppy weighs close to a 1000 =
=3D
pounds and now sits in my garage.
ok
the question is: can i take each element separately and cobble the positive=
=3D
/negative wires to a 6-gauge wire ( or 10-gauge ??? ), 110-volt plug-in wit=
=3D
h a relay off/on switch inbetweens element and receptical which would mean =
=3D
i would be plugging these into 6 ( 110 volt) outlets on the wall ???
In theory, each would fire separately when the relay switch was turned on .=
=3D
. . .
In theory: wouldn't this turn a 3-phase into 6 single phase connections ???
Would this work ???
All help and ideas will be treasured ( i think . . . .)
Thanks=3D20
Chae
=3DA0=3D0A=3D0A=3D0A

### Arnold Howard on tue 11 aug 09

From: "Chaeli Sullivan"
Inside an AH6 Amaco kiln there are 4 sets of side elements
and 2 on the bottom. Originally, they were all wired
together to make a 3 phase, 208 volt kiln.
----------
Chae, if that were my kiln, I would contact Amaco and ask
how to convert it to 240 volts, single phase. They can give
you a wiring diagram that will show exactly how to make the
conversion and can tell you which parts you will need.

Sincerely,

Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com

### Michael Wendt on tue 11 aug 09

Chaeli,
the problem with the 208 elements at 120 volts is they never
get hot enough to do much.
Additionally, 120 volt outlets are usually limited to 15
amps since you can only utilize 80% of a circuit's rated
capacity in a continuous duration application like a kiln.
The first step to using the kiln is to check the name plate
and record the ratings. Total wattage will tell you the
required 240 volt breaker and wire size using Ohm's Law.

watts =3D amps^2 x resistance
amps =3D volts/resistance
NOTE:
be aware that hot resistance is about 20% higher in an
element than cold resistance so any design work you do needs
to reflect that fact.

Other than that, the 208 elements will work fine but will
run hotter due to lower resistance so a computer controller
would be a boon in this situation because the elements would
simply cycle on for less time for most of the firing and
would easily keep up with even a fast firing schedule.
Regards,
Michael Wendt

Chaeli wrote:
Quick question:
Inside an AH6 Amaco kiln there are 4 sets of side elements
and 2 on the bottom. Originally, they were all wired
together to make a 3 phase, 208 volt kiln.
Someone offered me this ancient beasti and my thoughts were:
instead of trying to build a kiln from scratch, why not just
remodel this one ( hadn't a clue at the time that it was a
3-phase). This puppy weighs close to a 1000 pounds and now
sits in my garage.
ok
the question is: can i take each element separately and
cobble the positive/negative wires to a 6-gauge wire ( or
10-gauge ??? ), 110-volt plug-in with a relay off/on switch
inbetweens element and receptical which would mean i would
be plugging these into 6 ( 110 volt) outlets on the wall ???
In theory, each would fire separately when the relay switch
was turned on . . . .
In theory: wouldn't this turn a 3-phase into 6 single phase
connections ???
Would this work ???
All help and ideas will be treasured ( i think . . . .)
Thanks
Cha