Question 1

What is the definition of 'demand factor' as used in electrical load calculations?

Accepted Answer

Demand factor is the ratio of the maximum demand of a system to the total connected load of that system, expressed as a percentage or decimal.

Question 2

What does 'connected load' mean in electrical load calculations?

Accepted Answer

Connected load is the total wattage (or VA) of all electrical equipment that is wired and connected to a system, regardless of whether it is operating at any given time.

Question 3

What is 'diversity factor' and how does it differ from demand factor?

Accepted Answer

Diversity factor is the ratio of the sum of the individual maximum demands to the maximum demand of the whole system; it is always greater than or equal to 1, whereas demand factor is always less than or equal to 1.

Question 4

What is the NEC definition of 'continuous load'?

Accepted Answer

A continuous load is a load where the maximum current is expected to continue for 3 hours or more.

Question 5

What is 'maximum demand' in the context of electrical load calculations?

Accepted Answer

Maximum demand is the greatest of all demands that have occurred over a specified period of time, typically measured in kilowatts or kilovolt-amperes.

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