Electrical drawings
Cable schedule
A cable schedule is a table of information about cables for a particular installation. This can relate to cables for power, lighting, communication, security, fire, etc. A building floor plan would often be associated with the cable schedule and the type of information shown could include:
- length
- type and size
- colour
- termination detail
- to and from devices
- route
- conduit detail.
The information can be used to:
- estimate quantity of cable and total costs for a given job
- identify termination points from plan to actual job
- identify specific cable during diagnosis and/or testing.
Cable schedules are not commonly used for domestic installations, but will be used for more complex situations. A sample of the type of data that may be found on the schedule is shown in the table below. The ID as shown in the first column would correspond to a cable ID number that might be included on any or all of the building plan, circuit, or wiring diagrams.
| ID | Cable type/size | Colour | From device | Terminal (Tag) | To device | Terminal (Tag) | Voltage | Length |
|---|---|---|---|---|---|---|---|---|
| 01L | PVC insulated and sheathed 2 core + earth flat 450/750 1.5mm2 | R/G/B | Main switch board -building A | 01L-MSB | Light batten holder - room A104 S side | 01L-BH-A104S | 240AC | 6m |
| 02P | PVC insulated and sheathed2 core + earth flat 450/750 2.5mm2 | R/G/B | Main switch board -building A | 02P-MSB | Power outlet - lounge NW wall | 02P-ONW | 240AC | 25m |
| 03C | Cat5 | Std | Router 1, building A | 03C-R1A/O1/A104 | Outlet 1 - room A104 | 03C-O1/A104/R1A | Data | 20m |
| 04A | PVC insulated and sheathed, low loss fig. 8 OFC speaker cable,
315 x 0.12mm conductors, 3.5mm2 |
B/W | Public address - office 1, building A | 04A-OF1/A104 | Speaker - room A104 | 04A-A104/OF1 | Comms | 35m |
