multiplier on lighting

[wmb1973]

When do you apply the 1.8 multiplier to discharge lighting calcs ? is it to Ib design currrent or later at the correction factor stage, and also is the 1.8 mutiplier the same as the power factor ? Just using cable-mate for my calcs (checked via big red book obviously) and it asks for power factor next to voltage and length of run, anyone used this solftware ? cheers.

 

[Guest123]

Hi.

The 1.8 factor is applied to the total wattage of the lamp.

Power factor is a very different beast concerning the True power, Apparent power, and Reactive power of a circuit.

 

[Frenchsparky]

Typically 1.8 mulitplier factor useally cover most case of discharge luminaires expect some electronic verison then I will drop it down to 1.3.

Btw the 1.8 mulitpiler do work with both 50 HZ and 60 HZ discharge luminaires. { for DC verison Don't go there it a nutty spot to deal with it }

Merci,Marc