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> Luminaires / Mounting and electrical connection / Diameters of through-wiring accessories / Maximum number of luminaires per electrical conductor
The maximum permissible number of luminaires to be connected to one conductor is generally limited by the permissible current load of the conductor. The luminaires’ power factor must be considered as well. Where it is unknown, λ ≥ 0, 9 can be assumed based on EN 60598 if "purpose-designed luminaires" or luminaires with a power consumption ≥ 25W are used (see also chapter "Power factor"). With inductive luminaires intended for fluorescent lamps, on-site compensation measures must be considered as applicable (see chapter "Reactive power compensation").
The maximum permissible operating current is determined by the cable cross-section and the installation type (see above), but can be further limited by the voltage drop in case of extended cable lengths.
Diameters of through-wiring accessories Line voltage drop
Maximum number of luminaires per electrical conductor Line voltage drop
Mounting Lighting heat Electrical connection Diameters of through-wiring
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