Metering system - usual point of measurement for Lighting

We propose here below some guideline to define the points of measurement according to the energy use and the required breakdown of the measurement (the breakdown means how the energy use consumption will be reported, it can be reported as building global consumption or consumption per floor or area)

Data to collect according to consumption breakdown:

• Global consumptions: aggregations of lighting consumptions of each area
• Area consumptions: consumption of the circuits supplying the area – it includes energy consumed by lighting fixtures, ballast, transformers…

Method of measurement

• Without individual control or dimming: hours counter or electrical meter
• With control or dimming: electrical meter

Usual point of measurement locations:

• Lighting feeders or group of feeders in the electrical switchboards