Abstract: An apparatus for supporting electrical cables includes a first block having a bottom portion attachable to a cable tray and a top interfacial surface comprising a set of guide-receiving features extending from the first side to the second side of the apparatus. The apparatus also includes a second block having a bottom interfacial surface attachable to the top interfacial surface of the first block. The bottom interfacial surface of the second block includes another set of guide-receiving features. The sets of guide-receiving features on the top interfacial surface of the first block and the bottom interfacial surface of the second block cooperatively form a plurality of passages passing through the apparatus at an interface between the first and second blocks when the first block is attached to the second block. The apparatus also includes a plurality of guides for placement into corresponding passages to receive the plurality of cables.