TPS cable in Australian electrical work
What TPS cable means in Australian cable notes, and what still needs product, installation and calculator review.
What TPS Cable Means
TPS is common Australian trade language for thermoplastic-sheathed cable. In many notes it is used to identify a familiar fixed-wiring cable family before cable size, conductor material, route and installation conditions are checked.
The term alone does not provide current-carrying capacity, voltage-drop data, installation method, protection suitability or product compatibility. Those values must come from the actual product and the project source data.
What TPS Does Not Tell You
TPS is a cable type label, not a complete wiring description. It does not say whether the run is installed in free air, in conduit, in a ceiling space, grouped with other circuits, exposed to heat, mechanically protected or suitable for a particular environment.
It also does not replace the conductor description. A cable note may need active, neutral and protective earth wording where the circuit context requires it, and it still needs the exact metric size and product data used for calculation.
| Field | What to write down | Common follow-up check |
|---|---|---|
| Cable type | TPS, plus the product description where known. | Product data and installation context. |
| Conductors | Active, neutral and protective earth where relevant. | Circuit identification and protection context. |
| Metric size | Exact mm2 label used in the schedule. | Current-carrying capacity and voltage drop. |
| Route context | Length, enclosure, grouping and installation conditions. | Voltage drop and derating review. |
| Data source | Manufacturer or project data used for ratings or cable data. | Traceability before the result is reused. |
Example Final-Subcircuit Note
A 230 V final subcircuit note might read: Kitchen power final subcircuit, TPS copper cable, active-neutral-protective earth arrangement, metric size as selected, 22 m route length, product data source recorded.
That note is useful because it names the cable family and the calculation context. It still does not say the cable is selected. The current-carrying capacity source, voltage-drop result, installation method, protection and project requirements still need their own checks.
| Note field | Example wording | Why it stays visible |
|---|---|---|
| Circuit label | Kitchen power final subcircuit. | Connects the cable note to the load schedule. |
| Cable label | TPS, copper, metric size as selected. | Names the cable family without implying a rating. |
| Conductors | Active, neutral and protective earth noted where relevant. | Avoids treating TPS as a complete wiring description. |
| Calculation inputs | 230 V basis, load current, route length and data source. | Gives the cable-size and voltage-drop records enough context. |
TPS In Cable Calculations
For cable-size review, the TPS label should travel with current-carrying capacity data that matches the product and installation basis. For voltage-drop review, it should travel with route length, voltage basis and conductor data. For derating review, it should travel with grouping, ambient and installation method notes.
The label can be especially misleading if it is used as a shortcut for ratings. A familiar cable family still needs the actual source data for the run being checked.
Where TPS Should Not Be Used As A Shortcut
Do not use TPS wording to describe another cable construction, a flexible cord, an armoured cable, a conduit system or a buried cable arrangement unless the product description actually supports it. Do not assume a TPS run is suitable just because it is familiar in residential and light-commercial work.
Keep the cable label consistent across the load schedule, cable-size worksheet and voltage-drop result. Changing the label mid-review can hide whether the same cable route is still being checked.
Next checks
- Use the metric cable sizes table for size labels, not ratings.
- Use the cable-size calculator when candidate current-carrying data and installation context are ready.
- Use the voltage-drop calculator when route length, current, voltage basis and conductor data are ready.
Boundaries
- This page does not provide TPS cable ratings or installation instructions.
- It does not decide installation method, protection requirements or environmental suitability.
- Product instructions, current cable data, project documents, current standards context and competent review remain necessary.