- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
I ran into a situation today that was sort of like the other thread "20A breaker protecting #8 wire". I didn't want to confuse the other thread anymore than it already is for some, so I started a new one.
I was asked to help wire a commercial kitchen. Well actually a donut, coffee, and ice cream shop.
They have two commercial ovens. They are 3? ovens. The name plate on the ovens says the amperage/current is 54-57-59. Also states the supply conductors should be 4 AWG-75 deg. With the current for each phase listed you would think you would need a 60A breaker.
With a 60A breaker normally you could run #6 AWG.
My question is since the conductor size is listed on the name plate as #4 and #6 would be rated for 65A and what would be "normal", would this be considered upsizing the conductors as in 250.122(B)? Would you need to also upsize the EGC proportionally from a #10, which would be what a 60A breaker would call for, if it is considered upsizing?
Also, and to back up a little. Do you think a 60A breaker would suffice for the currents that are listed on the name plate?
The name plate didn't mention the OCPD size.
I was asked to help wire a commercial kitchen. Well actually a donut, coffee, and ice cream shop.
They have two commercial ovens. They are 3? ovens. The name plate on the ovens says the amperage/current is 54-57-59. Also states the supply conductors should be 4 AWG-75 deg. With the current for each phase listed you would think you would need a 60A breaker.
With a 60A breaker normally you could run #6 AWG.
My question is since the conductor size is listed on the name plate as #4 and #6 would be rated for 65A and what would be "normal", would this be considered upsizing the conductors as in 250.122(B)? Would you need to also upsize the EGC proportionally from a #10, which would be what a 60A breaker would call for, if it is considered upsizing?
Also, and to back up a little. Do you think a 60A breaker would suffice for the currents that are listed on the name plate?
The name plate didn't mention the OCPD size.