Rate Explanation General (Rate 9) Applicable to members for commercial, small power and three-phase farm uses: <25 kW demand (single and three phase service). Electric Heat Rate This rate benefits Members who use over 1200 kWh’s in a billing period during November through March. Irrigation (Rage 17, 71, 17on/off) Applicable to members contracting power for use of electric power for irrigation pumping, (single and three phase service). Power Cost Adjustment (PCA) The PCA provides for a monthly adjustment dependent on any differences in the average cost from the base cost of wholesale power. Residential (Rate 1 and 2) Applicable to residential members of the Cooperative (single-phase service).