Abstract: Service loop tray assembly provides aesthetic organized service loop for a large or small amount of low voltage cables. In data center, a series of channel-shaped cable trays hold sets of cables. Each cable tray has a substantially u-shaped cross section and is mounted to a ladder rack at a series of junctures. The cable tray includes a substantially level service loop section, a cable access ramp and a cable drop lip, the service loop section connected to a cable access ramp and to a cable drop lip, the cable drop lip positioned to guide a first set of cables resting on the first cable tray into a data cabinet under the ladder rack containing termination points for cables. Cable access ramp of each cable tray rises sufficiently to avoid interference with a further set of cables that continues to a further cable tray at further junctures along ladder rack.