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Question about kitchen griddle breaker size

H

hhsting

Senior Member
Location
Glen bunie, md, us
Occupation
Junior plan reviewer
I have Griddle that is 9 kVA at 208V three phase. The engineer has provided 40A breaker and 50A receptacle.
FLA is 24.98A with 1.25% should give 31.22A.


Question should not the breaker be 35A instead of 40A?
 
infinity

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
As Joe said you only need to use 150% or the next standard size in your calculation. There is no 125%.
 
hbiss

hbiss

EC, Westchester, New York NEC: 2014
Location
Hawthorne, New York NEC: 2014
Occupation
EC
(3) Not exceed 150 percent of the appliance rated current if
the overcurrent protection rating is not marked and the
appliance is rated over 13.3 amperes.
Click to expand...

The FLA is 24.98A. 150% of that is 37.47A. According to 422.11(E)(3) you can use 35A breaker since it satisfies the 24.98A requirement or not more than a 40A which is the next standard size above 37.47A.

It doesn't say to apply 150% and size the OCP accordingly. Only that OCP can't exceed 150% of the FLA.

-Hal
 
infinity

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
hbiss said:
The FLA is 24.98A. 150% of that is 37.47A. According to 422.11(E)(3) you can use 35A breaker since it satisfies the 24.98A requirement or not more than a 40A which is the next standard size above 37.47A.
Click to expand...
The OP calls for a 40 amp circuit with a 50 amp receptacle. Are you saying that isn't code compliant or just that you're not required to use the 150%?
 
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