Electrical WiringHow ToQuestions - Answers

Diversity Factor in Electrical Wiring Installation

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:

  • Diversity factor may be neglected in case of final sub circuits.
  • Except of homes and buildings, diversity factor in electrical wiring installation may be neglected in offices or those places where all connected loads operate at once.


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

Diversity Factor in Electrical Wiring Installation

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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