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Understanding the Diversity Factor in Electrical Wiring: Why It Matters for Cable Sizing

What is Diversity Factor in Electrical Wiring Installation

In a building, the whole load of electrical wiring installation doesn’t use at the same time. In other words, we do not use all the loads at once at home i.e. switching  ON all the fans, light points, Air conditioner, TV, fridge, Water gazer, heater, Electric iron etc at once. Therefore, we consider diversity factor while selecting the proper size of cables and wires for electrical wiring installation.

Diversity factor may e defined as:

Diversity Factor = Total Connected Load / Actual Maximum Load

Good to know:

Example:

In a flat, the max demand of load current is follow (90 Amp).

Understanding the Diversity Factor in Electrical Wiring: Why It Matters for Cable Sizing

But with the help of using diversity factor, we found total load current about 52A.

In this case, consider 52A (+ 20% for future load = 62.4A) instead of 90A for calculation and selection of proper size of cable for wiring installations.


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