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electric kiln, gives off quite a shock

updated sun 2 apr 00

 

Jo Gallegos on thu 30 mar 00

Hi, my kiln, an electric, made by crusader, has had a"make over "as i bought
it used and in need of some repair. I had an electrician check the order of
the wires, incoming and out going, 2 new infinate switches, a new sitter
porcelain, contacts unit and the timer unit, in addition i replaced 3 (outta
8) elements. Well, to get to the point, i fired it up and about 1 or 2 hours
of being in the firing process i get a shock if i touch the outsidem casing
(yes i quit touching it lol) so anyhow the electrician cnt figure it out,
although his boss might, ANY SUGGESTIONS. Thanks in advance (new to CLAY-ART,
and very much enjoying many of the posts). Jo

Don & Isao Morrill on fri 31 mar 00

At 12:38 3/30/00 EST, you wrote:
>----------------------------Original message----------------------------
>Hi, my kiln, an electric, made by crusader, has had a"make over "as i bought
>it used and in need of some repair. I had an electrician check the order of
>the wires, incoming and out going, 2 new infinate switches, a new sitter
>porcelain, contacts unit and the timer unit, in addition i replaced 3 (outta
>8) elements. Well, to get to the point, i fired it up and about 1 or 2 hours
>of being in the firing process i get a shock if i touch the outsidem casing
>(yes i quit touching it lol) so anyhow the electrician cnt figure it out,
>although his boss might, ANY SUGGESTIONS. Thanks in advance (new to CLAY-ART,
>and very much enjoying many of the posts). Jo
>

Jo, Possibilities: One of the coil-fasting staples could be
touching the outer case through contact with an old piece of staple. This
would ground the coil through the staple to the case which is itself
ungrounded to the floor or a normal ground-point. Measure from the case to
a good earthground. It is possible that you could measure,from a few volts,
to 110v. and drawing only a small current through the coil.
There are no "good shocks."
Is the kiln standing on a damp
wood floor? Is the kiln standing on a plywood 'pad'? The pad would have the
effect of isolating the kiln from ground until you touched the case.
Don & Isao
Don & Isao Sanami Morrill
e-Mail:


chris@euclids.com on fri 31 mar 00

> Well, to get to the point, i fired it up and about 1 or 2 hours
> of being in the firing process i get a shock if i touch the outsidem
casing
> (yes i quit touching it lol) so anyhow the electrician cnt figure it out,
> although his boss might, ANY SUGGESTIONS. Jo

Hi Jo,
There is probably a "short to ground".
There could be a wire that is touching the case (or touching something else
that is, in turn, touching the case).
Possibly, when the wiring chamber (gutter) was put back in place it pushed
up against an element tail, wire or "something".
If you only get a shock after a few hours of firing, then it points towards
"something" that has moved due to the expansion which is caused by the
heating process. Keep this in mind & look at element tails, connections,
connectors on the back of the switches, wiring, connection blocks, ect... &
see if it is possible for anything to touch the case or other parts.
One other odd thing i have seen is element pins, used to keep elements in
place, being too long. So long that they go right through the brick & touch
the case (jacket) causing a short.
Definately fix the problem before using the kiln ... it could be the start
of a much bigger problem.
chris

chris@euclids.com
www.euclids.com
800-296-5456

Barney Adams on fri 31 mar 00

If the wiring of the plug isn't reversed, I'd have the electrician check
the wiring of the receptical.

Barney

Jo Gallegos wrote:

> ----------------------------Original message----------------------------
> Hi, my kiln, an electric, made by crusader, has had a"make over "as i bought
> it used and in need of some repair. I had an electrician check the order of
> the wires, incoming and out going, 2 new infinate switches, a new sitter
> porcelain, contacts unit and the timer unit, in addition i replaced 3 (outta
> 8) elements. Well, to get to the point, i fired it up and about 1 or 2 hours
> of being in the firing process i get a shock if i touch the outsidem casing
> (yes i quit touching it lol) so anyhow the electrician cnt figure it out,
> although his boss might, ANY SUGGESTIONS. Thanks in advance (new to CLAY-ART,
> and very much enjoying many of the posts). Jo

Louis H.. Katz on fri 31 mar 00

You don't need a new kiln. You need a new electrician.
Unplug kiln.
Check for continuity (lack of it) between the round lead and both hots
Turn on the kiln sitter and turn off all the elements- Check for continutity
again
Turn on each elelment individually and contiute to check for continuity

If this doesn't work. Tell your electrician to get some insulated gloves and be
careful. Stand on a dry rubber matt.

plug in kiln

With kiln sitter and switches off check for voltage between the case and a
ground
If none is found turn on the kiln sitter and check again
If none is found try it with each of the switches.

When you find which part of the kln has the problem, Wall to sitter, sitter to
switches, or from the switches to the elements, open the kiln and look for the
problem. Something is making contact with the case. It could be one or more
element pins that are too long. Have you put new pins in recently?
Louis

Jo Gallegos wrote:

> ----------------------------Original message----------------------------
> Hi, my kiln, an electric, made by crusader, has had a"make over "as i bought
> it used and in need of some repair. I had an electrician check the order of
> the wires, incoming and out going, 2 new infinate switches, a new sitter
> porcelain, contacts unit and the timer unit, in addition i replaced 3 (outta
> 8) elements. Well, to get to the point, i fired it up and about 1 or 2 hours
> of being in the firing process i get a shock if i touch the outsidem casing
> (yes i quit touching it lol) so anyhow the electrician cnt figure it out,
> although his boss might, ANY SUGGESTIONS. Thanks in advance (new to CLAY-ART,
> and very much enjoying many of the posts). Jo

John Rodgers on fri 31 mar 00

You have an electrical short to the covering of the kiln. Could be deadly. I
have a cone ten crusader. I don't have that problemn, but you best get a good
electrician to look at it before someone gets badly hurt or killed or a fire is
started and the place burns down.

In the meantime "kep'n mittn't der finnner pointn's off'n lessn' you
electri'fieden!!!!

John Rodgers
Birmingham, AL



Jo Gallegos wrote:

> ----------------------------Original message----------------------------
> Hi, my kiln, an electric, made by crusader, has had a"make over "as i bought
> it used and in need of some repair. I had an electrician check the order of
> the wires, incoming and out going, 2 new infinate switches, a new sitter
> porcelain, contacts unit and the timer unit, in addition i replaced 3 (outta
> 8) elements. Well, to get to the point, i fired it up and about 1 or 2 hours
> of being in the firing process i get a shock if i touch the outsidem casing
> (yes i quit touching it lol) so anyhow the electrician cnt figure it out,
> although his boss might, ANY SUGGESTIONS. Thanks in advance (new to CLAY-ART,
> and very much enjoying many of the posts). Jo

Arnold Howard on fri 31 mar 00

An element may be touching the stainless case or heat
shield where the element enters the firing chamber.

Arnold Howard

--- Jo Gallegos wrote:
> ----------------------------Original
> message----------------------------
> Hi, my kiln, an electric, made by crusader, has had
> a"make over "as i bought
> it used and in need of some repair. I had an
> electrician check the order of
> the wires, incoming and out going, 2 new infinate
> switches, a new sitter
> porcelain, contacts unit and the timer unit, in
> addition i replaced 3 (outta
> 8) elements. Well, to get to the point, i fired it
> up and about 1 or 2 hours
> of being in the firing process i get a shock if i
> touch the outsidem casing
> (yes i quit touching it lol) so anyhow the
> electrician cnt figure it out,
> although his boss might, ANY SUGGESTIONS. Thanks in
> advance (new to CLAY-ART,
> and very much enjoying many of the posts). Jo
>

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Peter Linford on fri 31 mar 00

This happened to me several years ago and it turned out to be static
electricity, but never figured out why and it went away! I guess as your
still standing this may be similar?
Peter Linford
c/o Motor Yacht Alia'n, Hotel Intercontinental,
P.O. Box 36, Hurghada, Red Sea, EGYPT.
Tel. (oo20) 65442045
Fax/Voicemail : 0870 1629309


----------
>From: Jo Gallegos
>To: CLAYART@LSV.UKY.EDU
>Subject: Electric kiln, gives off quite a shock
>Date: Thu, Mar 30, 2000, 7:38 pm
>

> ----------------------------Original message----------------------------
> Hi, my kiln, an electric, made by crusader, has had a"make over "as i bought
> it used and in need of some repair. I had an electrician check the order of
> the wires, incoming and out going, 2 new infinate switches, a new sitter
> porcelain, contacts unit and the timer unit, in addition i replaced 3 (outta
> 8) elements. Well, to get to the point, i fired it up and about 1 or 2 hours
> of being in the firing process i get a shock if i touch the outsidem casing
> (yes i quit touching it lol) so anyhow the electrician cnt figure it out,
> although his boss might, ANY SUGGESTIONS. Thanks in advance (new to CLAY-ART,
> and very much enjoying many of the posts). Jo
>

Charles G Hughes on sat 1 apr 00

My bet is on one of the pigtails touching the control box panel after it
gets bolted on. Those little devils have to be trimmed back after they are
in place.


-C

> > ----------------------------Original message----------------------------
> > Hi, my kiln, an electric, made by crusader, has had a"make over "as i
bought
> > it used and in need of some repair. I had an electrician check the order
of
> > the wires, incoming and out going, 2 new infinate switches, a new sitter
> > porcelain, contacts unit and the timer unit, in addition i replaced 3
(outta
> > 8) elements. Well, to get to the point, i fired it up and about 1 or 2
hours
> > of being in the firing process i get a shock if i touch the outsidem
casing
> > (yes i quit touching it lol) so anyhow the electrician cnt figure it
out,
> > although his boss might, ANY SUGGESTIONS. Thanks in advance (new to
CLAY-ART,
> > and very much enjoying many of the posts). Jo