DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   Electrical (http://www.diychatroom.com/f18/)
-   -   Installing a ceramic kiln (http://www.diychatroom.com/f18/installing-ceramic-kiln-179201/)

jahertz 05-10-2013 05:20 AM

Installing a ceramic kiln
 
2 Attachment(s)
Attachment 70628



Attachment 70629

Hello, I am trying to find some information to help me install a ceramic kiln. The above images are the information plate and plug for the Evenheat kiln.

I understand that there needs to be a 240v breaker installed (I have room for it on the panel and I have replaced breakers in the past). I have read that I have to have kiln be 80% of the Amperage rating of said breaker. So I would need a 60A rated breaker.

Now I what I am having trouble with is finding an outlet/receptacle that 1) matches the factory plug. 2) matches the 240v 60A

Please illuminate me with the solution that I'm sure is right in front of me.

kbsparky 05-10-2013 05:26 AM

That's a typical welder plug on the kiln. It's rated at 50 Amps, 240 Volts.
NEMA 6-50.

You can readily get a receptacle that matches it at most electrical suppliers. Some home-horror stores may also have these in stock.

You can feed it with #8 THHN conductors installed in conduit, or #6/2 romex cable.

You don't need anything larger than a 50 Amp breaker.

Speedy Petey 05-10-2013 06:03 AM

Sorry KB, I disagree.

I do a lot of kilns, and IMO this unit requires hard wiring with a local disconnect since 60A devices are basically non-existent locally and stupidly expensive.
http://www.amazon.com/Leviton-9460-R.../dp/B00271GXA6
https://www.platt.com/platt-electric...px?zpid=161882

It is a continuous load over 50A so a 50A circuit and receptacle are not appropriate. 6/2NM is just slightly under the limit for ampacity, but I would not worry about it.

Someone just put that welder cable on it because it was easy. That does not make it appropriate.

usair 05-10-2013 06:20 AM

Quote:

Originally Posted by Speedy Petey (Post 1176236)
Sorry KB, I disagree.

I do a lot of kilns, and IMO this unit requires hard wiring with a local disconnect since 60A devices are basically non-existent locally and stupidly expensive.
http://www.amazon.com/Leviton-9460-R.../dp/B00271GXA6
https://www.platt.com/platt-electric...px?zpid=161882

It is a continuous load over 50A so a 50A circuit and receptacle are not appropriate. 6/2NM is just slightly under the limit for ampacity, but I would not worry about it.

Someone just put that welder cable on it because it was easy. That does not make it appropriate.

what makes you think the cord was added and not factory installed?

md2lgyk 05-10-2013 06:36 AM

Have you tried to find an instruction manual for this kiln? Must be a big one; my wife has a small one that needs only a 30A breaker.

usair 05-10-2013 06:58 AM

Quote:

Originally Posted by md2lgyk (Post 1176250)
Have you tried to find an instruction manual for this kiln? Must be a big one; my wife has a small one that needs only a 30A breaker.

The photo shows 45 amp on the rating plate.

md2lgyk 05-10-2013 07:08 AM

Quote:

Originally Posted by usair (Post 1176265)
The photo shows 45 amp on the rating plate.

Yes, I saw that. By "big" I meant physical size.

r_marcinko 05-10-2013 08:00 AM

I'm a tile manufacturer and have over 25 electric kilns. Have that kiln hard wired and forget the plug. Over time the plastic around those prongs WILL melt.

mpoulton 05-10-2013 01:32 PM

I second the recommendation to hard-wire this kiln. I have one slightly larger than that, and I just moved it to my new house. Will be wiring it this weekend. The kiln will draw full rated power for many hours continuously, and in a hot environment. The 80% derating factor really needs to be applied, and kilns tend to melt plugs even when they don't exceed the ratings. I'd use #6 wire in flexible conduit and be done with it.

Speedy Petey 05-10-2013 02:07 PM

Quote:

Originally Posted by usair (Post 1176241)
what makes you think the cord was added and not factory installed?

Kiln's do not typically come with a cord attached, especially medium to bigger ones like this.

Speedy Petey 05-10-2013 02:08 PM

Quote:

Originally Posted by md2lgyk (Post 1176250)
Have you tried to find an instruction manual for this kiln?

The instructions will say to wire it according to local and national codes.

usair 05-10-2013 04:07 PM

Quote:

Originally Posted by Speedy Petey (Post 1176562)
Kiln's do not typically come with a cord attached, especially medium to bigger ones like this.

I just ran a circuit for an Evolution 2318 that came with a nema 6-50p and it s draw was 37A.

mpoulton 05-10-2013 04:09 PM

We all stand corrected!
http://evenheat-kiln.com/ceramic/rmseries/rm2-2329/
That's the current model of this kiln - the only difference appears to be updated controls. This kiln comes with that cord, and is intended to be plugged into a NEMA 6-50R receptacle, presumably on a 50A breaker since that's the largest allowed for the receptacle. I'd still take the cord off and hard-wire it, but using the cord would be perfectly acceptable.

Speedy Petey 05-10-2013 04:25 PM

Quote:

Originally Posted by usair (Post 1176620)
I just ran a circuit for an Evolution 2318 that came with a nema 6-50p and it s draw was 37A.

37 x 125% = 46.25

Speedy Petey 05-10-2013 04:26 PM

Quote:

Originally Posted by mpoulton (Post 1176622)
We all stand corrected!
http://evenheat-kiln.com/ceramic/rmseries/rm2-2329/
That's the current model of this kiln - the only difference appears to be updated controls. This kiln comes with that cord, and is intended to be plugged into a NEMA 6-50R receptacle, presumably on a 50A breaker since that's the largest allowed for the receptacle. I'd still take the cord off and hard-wire it, but using the cord would be perfectly acceptable.

I guess so huh?

It amazes me how a presumably listed product can be so blatantly non-code-complaint. :icon_rolleyes:


All times are GMT -5. The time now is 07:36 PM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved