Fixed Electric Space Heater

[infinity]

How would you calculate the branch circuit size for a fixed electric space heater with a fan motor? My guess is 125% of the heater ampacity + 125% of the motor ampacity. I can't seem to find it specifically in the NEC. :?

 

[charlie b]

210.19(A)(1) says to size the conductors for 125% of continuous loads plus the non-continuous loads. Its FPN2 kicks you over to 430, which brings the 125% of the motor into play. 424.3(B) calls the fixed space heaters a continuous load. So I would say you have it right (except that heaters and motors don?t have ?ampacity,? but rather have load values).

 

[infinity]

My thinking as well. Single motor at 125% and heater at 125% due to 424.3(B).

 

[resistance]

Sec 424.3 I believe the OCPD supplying electric space heating equipment having a resistance element with or without a motor should not be less than 1.25 of the total load of the heaters and motor. Or did you say this

 

[infinity]

Sec 424.3 I believe the OCPD supplying electric space heating equipment having a resistance element with or without a motor should not be less than 1.25 of the total load of the heaters and motor. Or did you say this

Pretty much what myself and Charlie said in a roundabout way. From what I gather there is no one code section that explicitly spells this out.

 

[stickboy1375]

I just use the name plate.