Seems to me you might be able to say s.th. like
ducts (or channels or conduits) for the electrical cables
and be done with it.

But anyway, Aufnahme der elektrischen Verteilung refers to the ducts (channels, conduits) which hold the cables.

GE Industrial Systems - Electrical Distribution System
This web page uses frames, but your browser doesn't support them. -->.
www.ge.com/links/industry/automotive/spotlights/geindsys/ conversion_kits.html

Electrical Distribution Control System - [ Diese Seite übersetzen ]
... Electrical Distribution System. An electrical distribution
system moves electrical energy from ...
www.motorola.com/LMPS/RNSG/fixed_data/electric.htm

See if that helps.

Kabelkanal m (geschlossen)
cable duct, cable trunking, wiring duct
Kabelkanal IEC 50(826), Amend. 2
cable channel
Kabelkanal (offen)
cable trough, cable channel, troughing n
Kabelkanal (groß, begehbar)
cable gallery, cable tunnel
Kabelkanal (Rohr)
cable conduit
[Siemens]