| Circuit / Load Type | Connected Load (W) / A | Assessment Rule (per standard) | Assessed Demand (W) | | :--- | :--- | :--- | :--- | | | 1,500 W | 100% of connected load | 1,500 W | | General Power Outlets (10 x 10A) | 10 outlets x 2,400W = 24,000 W | First 10A = 2,400W; Remaining 9 outlets x 50% = 10,800W | 13,200 W | | Refrigeration (2 fridges) | 1,200 W each (2,400W total) | Largest at 100% (1,200W), second at 50% (600W) | 1,800 W | | Microwave Oven | 1,500 W | 100% | 1,500 W | | Air Conditioner (split) | 3,500 W | 100% (only one) | 3,500 W | | Water Heater (under sink) | 2,400 W | 100% (or 0% if off-peak – assume peak) | 2,400 W | | Exhaust Fan | 300 W | 100% | 300 W | | Total Assessed Demand (Watts) | | | 24,200 W | | Divide by Voltage (230V) | | | 105.2 Amps | | Add 25% for future growth | | | ~131 Amps |
This paper is written in a standard academic/business format, including an abstract, body sections, and a practical example. Author: AI Research Unit Date: October 2023 Abstract The Maximum Demand Table is an essential document in electrical power system design, installation, and management. It serves to calculate the expected peak load (in kVA or kW) that an electrical installation will draw from the supply network. This paper explores the purpose, methodology, calculation standards (based on IEC, BS 7671, and AS/NZS 3000), and practical application of the Max Demand Table. It demonstrates that proper use of this table prevents overloading, ensures voltage stability, reduces capital expenditure on oversized equipment, and ensures compliance with regulatory safety standards. 1. Introduction In any electrical installation—from a single domestic dwelling to a multi-story commercial building—designers face a critical question: How much total current will the installation draw at its worst-case scenario? The answer is the Maximum Demand (MD) . max demand table