Add up the results from each category to find the . 4. The Formula
For a simple calculation of Current (Amps) in a single-phase system: For a three-phase system: maximum demand calculation
You rarely turn on every light, appliance, and motor in a building at the exact same time. Maximum demand calculation relies on two key principles: Add up the results from each category to find the
It prevents overloading cables and switchgear, which can lead to fires. It is also a mandatory requirement for electrical standards like BS 7671 (UK) or the NEC (USA) . Maximum demand calculation relies on two key principles:
Example: For domestic lighting, you might apply a diversity factor of . This means you assume only two-thirds of the lights will be on at once during peak times.
Modern electronics (LEDs, computers) can create "dirty" power that increases the neutral current, affecting the total demand profile. Conclusion