Section 285.5120  Schedule E-7: Load Research – Electric Utilities

Each electric utility with more than $50 million in total jurisdictional annual revenue shall provide a set of load research results that were developed no more than four years before the filing date. This submission shall consist of two parts:

a)         Schedule E-7: a full set of load research results based on statistical samples of the utility's rate classes. This shall include the following information:

1)         Monthly class and Illinois jurisdictional loads at the time of the system coincident peaks, along with the date and time of this peak;

2)         The monthly maximum non-coincident peak demands for each customer class, along with the date and time of each peak for each customer class;

3)         Class and jurisdictional load factors; and

4)         The statistical confidence level achieved for each set of load data developed.

b)         Schedule E-7 work papers. The utility shall provide the following materials in support of its load research results:

1)         The time period over which the data was collected;

2)         A full description of the statistical methods used by the utility to derive load research results, including accuracies and confidence levels its load research samples were designed to achieve; and

3)         A full explanation of the usage strata into which customers in the utility's load research sample are distributed. For each usage stratum, the utility must provide the following:

A)        Identify the number of customers and the customer types (by class) in that particular usage stratum;

B)        Average monthly usage;

C)        Average demand in kW at the time of the system peak; and

D)        Average non-coincident peak demand.

4)         An explanation of how the load research sample was derived and justification for the appropriateness of the sample used.

(Source:  Amended at 38 Ill. Reg. 7598, effective March 20, 2014)