Commercial Electric Range Load & MOCP

[Npstewart]

Hi Everyone. I have a electric range for a new restaurant. My voltage is 208-3. Apparently this thing requires two electrical connections. They show 0 amps on one of the phases for one of the connections but they show it in the 208-3 column on the chart. Should I still give this thing (2) 3 pole breakers and what size OCP should I use? It doesn't specify.

I have two of these things and additionally they have to be shunt tripped because they are under a hood that mean I need 8 poles for each of these which would be 16 poles total. I should probably just put all the kitchen electric on a separate panel and trip the main even though there is only a couple of other pieces of equipment.

Thanks!

 

[GoldDigger]

Hi Everyone. I have a electric range for a new restaurant. My voltage is 208-3. Apparently this thing requires two electrical connections. They show 0 amps on one of the phases for one of the connections but they show it in the 208-3 column on the chart. Should I still give this thing (2) 3 pole breakers and what size OCP should I use? It doesn't specify.

I have two of these things and additionally they have to be shunt tripped because they are under a hood that mean I need 8 poles for each of these which would be 16 poles total. I should probably just put all the kitchen electric on a separate panel and trip the main even though there is only a couple of other pieces of equipment.

Thanks!

It took awhile to figure out the table in the PDF. Here is my analysis:

Whether wired for three phase or single phase, there are two power input connections. The one on the left probably powers four burners only, the one on the right powers four burners and the oven.
Even though the LT section of the table shows zero power on the X-Z phase, there will be current in all three of the line wires, so you need a three pole breaker. The wires need to supply the per-line current shown and the OCP needs to protect the wires. Since all three poles of the three pole breaker will have the same trip point, the wires should all be sized to support the largest per-line load.
Since you have two of them, you may want to rotate the phase connections across the four inputs to do the best you can to produce a balanced three phase load when all elements are operating.

 

[Npstewart]

I just got off the phone with vulcan.

LT & RT stand for "Left & Right".

You take the highest amps per phase and multiply my 1.25 and select the next higher standard breaker size.


I am going to use a 80/3 for the right and a 30/3 for the for the left.


Thanks guys. Lesson of the day is that sometimes its just easier to use two charts rather than trying to jam everything into one lol.

Thanks for the help.