Sizing oven/microwave combo unit ??

[ritelec]

Roughed for an oven few months ago. It's a combo 27 " oven/microwave.

Did some research and brought over 10s on a 30

Now I'm looking and some units say minimum 30 amp done say 40.

The 40s and 30s are 7200 what.

Which from what I was looking at when I did the rough was 30 amp

Am I good on a 30 at 7200w

Or should I tell the owner to look for name plates that say 30 amp?


Thank you

 

[jaylectricity]

Roughed for an oven few months ago. It's a combo 27 " oven/microwave.

Did some research and brought over 10s on a 30

Now I'm looking and some units say minimum 30 amp done say 40.

The 40s and 30s are 7200 what.

Which from what I was looking at when I did the rough was 30 amp

Am I good on a 30 at 7200w

Or should I tell the owner to look for name plates that say 30 amp?


Thank you

Do you have 240V line to line?

 

[ritelec]

yes, 240v

I'm actually looking at a unit on line...

It says 30 amp min.

the unit is rated 7.5kw

the has a generic installation manual that says 4801w-7200w 30 A 7201w-9600w 40 or 50 amp.

do I use the "min 30 amp"(as noted on the spec sheet) and table 220.55 ( 7500 /240 = 31.25 x .80 = 25a to feed it with a 30 amp circa? OR at 7.5 kw / 240 which is 31.25 which should get fed with a 40 amp?( which is what the install manual says?

This isn't the unit..... just sending the link of one I found to get my head together on it.

Thank you


General specs that say 30 amp min

http://www.frigidaire.com/Kitchen-Appliances/Wall-Ovens/Microwave-Combo/FGMC3065PF/


Install that says kw to kw suggested circuit


http://manuals.frigidaire.com/prodinfo_pdf/Memphis/807611001.pdf

 

[jaylectricity]

Well, using this calculator you come up with 6kw, so 25 amps. My book isn't here so I'm not reading directly from the code.

 

[jaylectricity]

And so as long as the nameplate says "minimum 30A OCPD" and the instructions don't instruct you to use a 40A circuit you should be good to go with what you have.

 

[ritelec]

ok........ so the 80% .... and thats not a calculation for load, but an actual thats what you install..

 

[ritelec]

And so as long as the nameplate says "minimum 30A OCPD" and the instructions don't instruct you to use a 40A circuit you should be good to go with what you have.

ok... thank you