N-DJYP3VP3-22 Armored Fire Resistant Cable

A fire breaks out inside a cable tray. In less than four minutes, standard control cables melt. Circuit integrity collapses, emergency shutdown systems fail, and operators lose visualization of critical valves. Production stops for weeks. A fire-resistant cable that maintains functionality under direct flame is not an upgrade. In high-risk process plants, it is the baseline.

The N-DJYP3VP3-22 armored fire-resistant cable eliminates this single point of failure. Built with individually screened pairs, a collective shield, and galvanized steel tape armor, it keeps signal transmission stable during fire exposure for a defined circuit integrity period. This design directly supports safe shutdown sequences and reduces post-incident re-cabling costs by limiting the physical spread of damage through the tray.

Stranded Copper Conductors with PE Insulation

The electrical foundation. Class 2 stranded bare copper delivers low conductor resistance under ambient and elevated temperatures. Cross-linked polyethylene or solid polyethylene insulation—depending on the exact build—maintains dielectric strength when exposed to external heat flux.
Your signals do not short to ground during the fire. Instrument loops remain active, giving operators the data they need to execute a controlled sequence.

Individually and Collectively Shielded Pairs

Signal integrity matters before, during, and after a thermal event. Each twisted pair carries an aluminum/polyester tape screen with a drain wire. A collective overall screen sits beneath the inner sheath.
This dual-layer approach rejects high-frequency electromagnetic interference from variable frequency drives and switchgear. During a fire, the screen remains in place and continues to reduce noise coupling. No signal corruption in the first critical minutes means correct actuator positions are reported back to the DCS.

Galvanized Steel Tape Armor (22)

Mechanical protection that also contributes to fire performance. The steel tape armor, applied helically over the inner sheath, resists impact and crushing forces during installation in ladder racks and underground ducts. In a fire scenario, the steel layer acts as a thermal barrier, slowing heat transfer to insulated cores. More importantly, it prevents flame from propagating along the cable length inside grouped trays.
Damaged tray sections can be isolated. Adjacent cables survive. The repair scope stays small.

Flame-Retardant PVC Outer Sheath

The outermost layer is a specially compounded polyvinyl chloride that resists flame propagation and self-extinguishes when the ignition source is removed. It does not drip flaming particles.
Horizontal and vertical tray fires stay contained. Compliance with vertical flame spread tests—such as IEC 60332-3—means the cable meets the installation requirements of industrial insurers and local electrical codes.

Technical Specifications & Dimensions

Industry Applications & Scenario Validation

• Oil & Gas Processing Facilities
  Installed on emergency shutdown (ESD) valve actuators and firewater pump monitoring circuits. Circuit integrity under direct flame is a permit-to-operate requirement. The steel tape armor meets the physical protection expectations of jungle or desert pipeline trench installations.

• Tunnel and Metro Infrastructure
  Used in ventilation fan control and public address system cabling. The flame-retardant outer sheath limits smoke density during an underground fire. Collective screening prevents electromagnetic interference from overhead traction supply lines.

• Thermal Power Plants and Waste-to-Energy
  Boiler feed pump monitoring and burner management systems cannot afford to go dark during a coal mill fire. The cable maintains low-voltage signal continuity long enough to trip fuel supply valves safely.

• Chemical Storage and Tank Farms
  Product transfer pumps and remote-operated valves need fire-survivable control cables. Individual pair screens stop crosstalk between different tank level sensors running along the same multi-pair trunk.

• Marine and Offshore Platforms
  Fire-resistant construction supports compliance with SOLAS regulations for emergency lighting and fire pump control. Screening and armor shield signals from high-power generator sets installed in cramped electrical rooms.

International Compliance & QA Standards

✅ Designed and tested according to the requirements of IEC 60331-21 – Circuit integrity under fire conditions
✅ Flame propagation resistance verified per IEC 60332-1 (vertical flame test on a single cable) and IEC 60332-3 Category A (bunched cable vertical flame spread)
✅ Low smoke and halogen-free options available under IEC 60754-1/2 and IEC 61034-1/2 test methods (specify LSZH outer sheath at time of inquiry)
✅ CE marking under Low Voltage Directive 2014/35/EU (as applicable for instrumentation cables)
✅ Manufacturing facility operates under a ISO 9001:2015 certified quality management system
✅ RoHS 3 (Directive 2015/863/EU) compliant materials by default; conflict minerals reporting available

FAQ

How do I specify the exact fire resistance duration—30, 60, or 90 minutes—when ordering?
The circuit integrity duration depends on the fire-resistant layer construction (mica tape thickness and application) and the test standard applied. In your inquiry, state the required survival time, the test standard (IEC 60331-21, BS 6387, or equivalent), and whether the test is with mechanical shock or water spray. We will confirm the feasible construction and provide a type-test report reference. The standard build targets 90 minutes at 750°C under IEC 60331-21; longer or harsher conditions require a review before quotation.

Can the cable be installed in areas with high rodent or termite risk?
The galvanized steel tape armor provides moderate rodent deterrence for the inner cores. For installations with severe termite infestation, we recommend an additional nylon over-sheath or polyamide coating on the outer PVC jacket. This is a special order. Specify the environmental risk in your RFQ and we will include the right compound.

What determines the lead time for a 24-pair N-DJYP3VP3-22 cable?
Lead time is driven by conductor and mica tape procurement, pair assembly, and the application of steel tape armor. Standard pair counts up to 12 pairs usually remain in production stock or can be made in 4 to 5 weeks. A 24-pair configuration is typically a make-to-order item with a lead time of 7 to 8 weeks. Cut-to-length and drum preferences do not materially add to lead time. Air freight consolidation for long-haul lanes may add 5 to 7 days. Request a firm schedule with your volume and destination port for a precise promise.