Maximum Demand Calculation -

2. Applying Diversity Calculations (Standard Code Reference) Load Group Connected Load Diversity Rule Applied Calculated Demand 75% of connected load 900 W (3.9 A) Power Outlets 20 Sockets 10 A for first + 5 A for next 15 A (3,450 W) Air Conditioning 100% of largest + 50% of secondary 4,500 W (19.5 A) 3. Final Aggregation Total Diversified Power : Total Amperage at 230V :

Installing a physical current-limiting circuit breaker that mechanically caps the maximum demand at a predetermined value. National Electrical Code / NFPA 70 (United States)

The final maximum demand for the sample residential installation is

Consult national and local electrical codes (such as the National Electrical Code [NEC] in the US, BS 7671 in the UK, or AS/NZS 3000 in Australia) to find the standard diversity factors for each load group. Step 4: Calculate Sub-Group Demands maximum demand calculation

To avoid paying for unnecessarily large equipment or excessive utility demand charges. Compliance: To meet standards such as AS/NZS 3000. 2. Key Terminology and Factors

Modern facilities bypass infrastructure sizing bottlenecks using active and Peak Shaving technologies:

Apply the relevant diversity factors stipulated by your governing electrical code to each category group. National Electrical Code / NFPA 70 (United States)

Calculate the sum of individual maximum demands, then divide by the maximum system demand to determine the diversity factor.

The ratio of the average load over a designated period to the peak load occurring in that period. 3. Maximum Demand Calculation Methods

This example demonstrates how motors, lifts, and similar loads add complexity because ratings depend on the availability of similar loads on the same phase. MD is measured over a continuous

Typically calculated by total wattage or VA, categorized by luminaire type (LED, fluorescent, HID).

The first critical nuance of MD calculation lies in the . Contrary to popular misconception, maximum demand does not refer to a fleeting, instantaneous surge of current (e.g., starting a large motor). Such transient spikes are typically handled by protective devices like circuit breakers, but they do not dictate long-term infrastructure loading. Instead, MD is measured over a continuous, sliding time window.