Log In Sign Up

NOTE: This is an unformatted excerpt from our online fire protection training library.

Load Calculations

Branch Circuit Load Calculations

Range Demand Factors

For range loads, a special rule in Section 220.18(C) applies, allowing the application of a demand factor on the individual branch circuit that goes to an individual range. For the most part, this is a key difference between the calculations for branch circuits and feeders, that is, demand factors are usually applied only to feeders and service conductors, not to branch circuits. 

In general, a branch circuit must be sized for the entire load connected to it, but a feeder may be reduced in size based on how much of the load is actually on at the same time. With a feeder, it is necessary to think about the non-coincident nature of some of the load that exists on the various branch circuits that are connected to it. In the case of ranges, however, it is permitted to apply a demand factor to the total load at the branch circuit. This recognizes that an electric range actually represents a number of smaller loads. The assumption here, based on many years of experience with this type of load, is that a situation where the entire load is on at the same time for any extended period is very unlikely.

NOTE: This is an unformatted excerpt from our online fire protection training library.

Contact Us:

Please fill in the fields below:

    Privacy Policy
    Please choose all that interest you.

    Contact Customer Service at AcademySupport@jensenhughes.com or 800-930-9414 option 1.

    Our regular support hours are 9:00 AM to 5:00 PM, Monday through Friday, except holidays...