Single-Dwelling Service Calculation Explained Slowly | CEC Rule 8-200 | Red Seal Electrical Level 1

How big a service does a house need? This slow, step-by-step lesson builds a 2024 Canadian Electrical Code Rule 8-200 load calculation line by line: living area, basic load, heat, air conditioning, range, EV charger and other loads, then the minimum, then the amps. Made for apprentices who find this stuff hard. We go slow, one step at a time, and you can SEE the current moving in every circuit. Pause any time. 📘 WHAT YOU WILL LEARN • Living area from inside dimensions (Rule 8-110) • Why a basement counts at 75% only when it is over 1.8 m high • Basic load: 5000 W for the first 90 m², plus 1000 W for each 90 m² or part of it • Electric heat with room thermostats: first 10 kW at 100%, the rest at 75% (Rule 62-118 3)) • Air conditioning at 100%, and only the larger of heat or cooling when interlocked (Rule 8-106 3)) • Range: 6000 W plus 40% over 12 kW. EV charging at 100%. Other loads over 1500 W at 25% • Compare with the minimum: 24 000 W at 80 m² or more, otherwise 14 400 W • Divide by 240 V and choose the service ✏️ PRACTICE PROBLEMS IN THIS VIDEO • House: main 110 m², upper 60 m², basement 110 m² at 2.4 m → 252.5 m² → basic 7000 W • Heat 14 kW with room thermostats → 10 000 + 3000 = 13 000 W • A/C 4 kW (not interlocked) → 4000 W. Range 13 kW → 6400 W. EV 7.2 kW → 7200 W. Dryer 5 kW + water heater 3 kW → 2000 W • Total 39 600 W, minimum 24 000 W → 39 600 ÷ 240 = 165 A → 200 A service • Small house: 72 m², basement 1.7 m (not counted), range 12 kW, dryer 6 kW, water heater 3 kW → 13 250 W, minimum 14 400 W wins → 60 A • 175 m² → basic 6000 W • 16 kW heat with room thermostats → 14 500 W ⏱️ CHAPTERS 0:00 The problem 0:48 The big idea 2:33 Worked example 4:31 Your turn 5:42 Watch out 6:19 Pick the service 7:19 Check yourself 8:05 Recap 💡 HOW TO STUDY WITH THIS VIDEO 1. Watch once without writing anything. 2. Watch again and copy the math board on the right, line by line. 3. At every "Pause and try it" card, stop the video and do it yourself first. 4. Come back tomorrow and redo the practice problems from memory. ➡️ NEXT VIDEO: Applying the Code in a Dwelling 🔗 USEFUL LINKS Apprenticeship and certification in BC: SkilledTradesBC @SkilledTradesBC Electrical safety and permits in BC: Technical Safety BC @technicalsafetybc4449 Instagram: @skilledtradesbc @technicalsafetybc X: @skilledtradesbc Comment below with the part that confused you most. I read them and it helps decide the next video. ⚠️ Study material only. Always follow the current Canadian Electrical Code, your local authority, your employer's procedures and your instructor. Work on live equipment only if you are trained, authorized and wearing the right PPE. This channel is independent and is not affiliated with or endorsed by SkilledTradesBC, Technical Safety BC, CSA Group or the Red Seal Program. #ServiceCalculation #LoadCalculation #CECRule8200 #SingleDwellingServiceSize #ResidentialLoadCalculation #LivingAreaRule8110 #DemandFactor #BasicLoad #ElectricRangeDemand #EVChargerLoadCalculation #CanadianElectricalCode2024 #FirstYearElectrician #RedSealElectrical #RedSealExamPrep #ElectricalApprentice #RedSealPrep #Electrician #RedSeal #ElectricalTheory #Apprenticeship #SkilledTrades #TradesCanada #BCTrades #ElectricalTraining #LearnElectrical #ElectricianLife #ElectricalEngineering #TradeSchool #Level1Electrical