What Is Steel Wire Braided PVC-Coated Galvanized Spiral Conduit? Types and Selection
A steel wire braided PVC-coated galvanized spiral conduit is a cable protection conduit with a galvanized steel core, PVC jacket and outer steel braid, resisting liquids and abrasion.
A steel wire braided PVC-coated galvanized spiral conduit is a multilayer cable protection conduit with a PVC jacket over a flexible galvanized steel spiral core and a steel wire braid over the jacket. The steel core protects the cable against crushing, the PVC jacket against liquids and dust, and the outer braid protects the jacket against abrasion and impact. It is used on machine and industrial runs where oil splash, swarf and constant rubbing occur together.
Types of metal spiral conduit
| Type | Layers | When to choose it |
|---|---|---|
| Galvanized spiral conduit | Bare galvanized steel | Mechanical protection in dry indoor areas |
| PVC-coated galvanized spiral conduit | Galvanized steel and PVC jacket | General use in damp and dusty areas |
| Steel wire braided galvanized spiral conduit | Galvanized steel and steel wire braid, no jacket | Hot and abrasive zones without liquids |
| Steel wire braided PVC-coated galvanized spiral conduit | Galvanized steel, PVC jacket and steel wire braid | Runs exposed to both liquids and abrasion |
| Heavy-duty PVC-coated galvanized spiral conduit | Heavy-duty steel and liquid-tight PVC jacket | Runs with heavy liquid and mechanical stress where no braid is needed |
Selection criteria
- Size: The number in the CTPS code (10, 13, 16, 21, 26, 35, 40, 51) identifies the size series; it is not the inner diameter as such. The inner diameter must be comfortably larger than the cable bundle; check the inner and outer diameters on the product page.
- Temperature: The PVC jacket sets the limit. Ortaç gives -15 °C to +70 °C for this series. On runs passing near ovens, exhausts or hot surfaces, choose an unjacketed braided conduit; Ortaç lists its unjacketed CTS series with a much wider temperature range.
- Sealing and fittings: Ortaç rates the series IP65; this protection is achieved when a suitable fitting is fitted to the conduit end. The jacket and braid increase the outer diameter, so choose the fitting by this conduit's outer diameter, not by the unjacketed conduit with the same code, and by the thread of the panel entry (PG or metric).
- Coil length: Choose a coil long enough for the run; a single length without joints keeps the run sealed.
- Bending: The tightest bend on the route must be larger than the minimum bending radius on the datasheet.
Common mistakes
- Using an unjacketed braided conduit where liquids are present: The braid does not stop liquids; oil and water reach the core.
- Routing a PVC-jacketed conduit through a hot zone: Above the manufacturer's limit the jacket softens and the seal is lost.
- Not seating the cut end fully in the fitting: Cut braid wires fray, and the edge of the steel spiral damages the cable insulation.
- Treating the conduit as a protective conductor: Flexible metal conduit does not replace the protective (PE) conductor; earthing is done with a separate conductor in the cable.
Related standard
- IEC 61386-23: Particular requirements for flexible conduit systems within conduit systems for cable management. The product names do not declare conformity with this standard; ask the manufacturer for the certificate if required.
Products in the catalog
All 8 active products in the Steel Wire Braided PVC-Coated Galvanized Spiral Conduits category are from the Ortaç CTPS series:
| Code | Coil | Sold |
|---|---|---|
| CTPS 10, CTPS 13, CTPS 16, CTPS 21 | 50 m | By the metre, in multiples of 50 m |
| CTPS 26, CTPS 35, CTPS 40, CTPS 51 | 25 m | By the metre, in multiples of 25 m |
Price and lead time for the series are given on quotation.
Frequently asked questions
What is the difference between a steel wire braided PVC-coated conduit and a PVC-coated conduit?
Both have a galvanized steel core and a PVC jacket. The braided type also has a steel wire braid over the jacket, which protects it against abrasion and impact. Choose the braided type where the cable rubs constantly or swarf is present.
What is the difference between CTPS and CTS spiral conduit?
Both are Ortaç steel wire braided galvanized conduits and use the same size codes. CTPS has a PVC jacket under the braid and is sealed against liquids. CTS has no jacket; it is not sealed against liquids but can be used at higher temperatures.
What temperatures is a steel wire braided PVC-coated spiral conduit suitable for?
Ortaç gives -15 °C to +70 °C for the CTPS series. Use an unjacketed braided conduit in hotter zones.
In what lengths is CTPS spiral conduit sold?
Codes CTPS 10–21 are sold by the metre in multiples of a 50 m coil, and CTPS 26–51 in multiples of a 25 m coil.