Electrician Red Seal · Question
A dwelling unit has a primary electrical heating load of 15 kW and a domestic hot water tank of 3 kW. What is the calculated demand load, in kilowatts, for these two loads according to CEC Table 14 for a non-dwelling specific service?
For electric space heating and domestic water heaters, CEC Table 14 allows for a demand factor. For the first 10 kW of heating, 100% demand is applied. For the
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Question: A dwelling unit has a primary electrical heating load of 15 kW and a domestic hot water tank of 3 kW. What is the calculated demand load, in kilowatts, for these two loads according to CEC Table 14 for a non-dwelling specific service?
Answer options: ✅ 14.5 kW
- 15 kW
- 16.5 kW
- 18 kW
Correct answer: 14.5 kW
Explanation: For electric space heating and domestic water heaters, CEC Table 14 allows for a demand factor. For the first 10 kW of heating, 100% demand is applied. For the remainder (15 kW - 10 kW = 5 kW), a 75% demand factor applies (5 kW x 0.75 = 3.75 kW). For a domestic hot water tank up to 25 kW, 25% demand is applied (3 kW x 0.25 = 0.75 kW). Thus, the total demand is 10 kW + 3.75 kW + 0.75 kW = 14.5 kW.
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