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208 v 3 ph or 240 v 1 ph. connection #63950
03/28/06 12:53 AM
03/28/06 12:53 AM
C
Cinner  Offline OP
Member
Joined: Dec 2004
Posts: 78
Kelowna, B.C., Canada
A convection oven with nameplateinfo: 11kw, 208 3ph or 240 1 ph.

It has three wire leads, blk, red and white coming from the oven.

Is the 3 phase connection red to line 1, blk to line 2 and white to neutral? Can someone clarify.

Work Gear for Electricians and the Trades
Re: 208 v 3 ph or 240 v 1 ph. connection #63951
03/28/06 10:59 AM
03/28/06 10:59 AM
J
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
What does the wiring diagram show? Have you read the instructions?

Re: 208 v 3 ph or 240 v 1 ph. connection #63952
03/28/06 11:28 AM
03/28/06 11:28 AM
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
A white wire? How about using a meter to see what's really coming to the oven?

Re: 208 v 3 ph or 240 v 1 ph. connection #63953
03/28/06 02:23 PM
03/28/06 02:23 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,298
Estero,Fl,usa
It certainly sounds like this is single phase equipment and they are just recognizing that if you are on 2 phases of a 3 phase wye it will see 208v.


Greg Fretwell
Re: 208 v 3 ph or 240 v 1 ph. connection #63954
03/28/06 05:19 PM
03/28/06 05:19 PM
F
FountainGuy  Offline
Member
Joined: Mar 2006
Posts: 30
Lawrenceville,GA, U.S.A
That 3 for 3-phase must be a typo! For just an 11KW oven, it's probably your choice of 208V 1-Ph or 240V 1-Ph. But I wouldn't guess; if no manual or diagram is available, can you call the manufacturer of the oven for clarity?

Re: 208 v 3 ph or 240 v 1 ph. connection #63955
03/28/06 07:55 PM
03/28/06 07:55 PM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Quote
A convection oven with nameplateinfo: 11kw, 208 3ph or 240 1 ph


Any chance this is a Hobart commercial convection oven?

If so they can be configured for either supply system.

You need to look at the wiring diagram and compare it to the connections in the oven to determine if is presently wired for single or three phase.


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: 208 v 3 ph or 240 v 1 ph. connection #63956
03/28/06 08:16 PM
03/28/06 08:16 PM
R
RobbieD  Offline
Member
Joined: Feb 2003
Posts: 231
Canada
Some commercial ranges like the Garland ones say single or three phase on the talley plate. They give you all the different ways they wire their stoves depending on what you order. Basically one talley plate for every stove. You have to specify how you want it wired so it is compatible with your supply.
In your case it seems to be wired 3 wire 240 or 208V because of the neutral.

Re: 208 v 3 ph or 240 v 1 ph. connection #63957
03/28/06 08:22 PM
03/28/06 08:22 PM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Quote
In your case it seems to be wired 3 wire 240 or 208V because of the neutral.


Does he have a neutral or just a white wire in the cord?

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: 208 v 3 ph or 240 v 1 ph. connection #63958
03/28/06 10:54 PM
03/28/06 10:54 PM
R
RobbieD  Offline
Member
Joined: Feb 2003
Posts: 231
Canada
I guess I assume too much and would normally think that he knows where the leads are going before he connects them up.

MY BAD

If it has a cord see where the wires are going. Make sure the cord has a bond. By following the white lead you determine that it is a neutral hook the white wire to the identified conductor. You would figure there would be a diagram on the stove for you.

If you are unsure about these connections find more info on the range, get in contact with a distributor, don't rely on forums for this info, you don't want to do any costly mistakes.

Rob

Re: 208 v 3 ph or 240 v 1 ph. connection #63959
03/29/06 01:34 PM
03/29/06 01:34 PM
L
Larry Fine  Offline
Member
Joined: Feb 2005
Posts: 693
Richmond, VA
There's a good chance that some internal connections need to be changed for differing systems. RTFM!


Larry Fine
Fine Electric Co.
fineelectricco.com
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