Problem with oven heating up

[tavo1765]

I have a Greunburg 8x4x6 electric oven, its a 4 wire (2positive leads/ground/nuetral) 230 volt oven thats requires at least 206 volts to operate correctly. The over is 76.0 amps, its on a 100amp breaker. In my shop there is about 1200amps service plus a 3 phase line if needed.

Tonight I ran into a problem with it getting up to temp. it was only getting up to about 170f in 30mins, usually it would be about 350f by that time. I verfied the fuses, and voltage getting to the oven which was 208vac. Anyone good with ovens have any ideas what could be the problem.

[pickleboy]

try disconnecting all the elements and ohm them out i would guess that is line voltage was equal and good then one of them might be burning out if you have 2 or more the should all read close to the same ohm rating. if not, if one reads real high it is most likely bad and then wont heat properly.

[sswee]

Just curious but you said you had a 3 phase line. Is it 240 or 480? If it's 240 3 phase why don't you wire your oven off the 3 phase line? You wouldn't have to keep worrying about overloading your main service and would probably drop you electric bill if it is like it is where I am at. I wired the home oven I am using now into a 240 3 phase box from where a lathe use to sit. SS