N-DJYP2V22 Fire-Resistant, Shielded & Armoured Computer Cable – Factory-Customized Specifications

Signal dropout during a fire event does not just trigger a nuisance alarm. It disables emergency shutdown systems, cuts off critical actuator feedback, and leaves field devices blind when plant safety depends on them most. The N-DJYP2V22 cable is specified to close that gap. It protects instrument and computer circuits against electromagnetic interference, physical impact, and direct flame exposure—keeping SCADA, DCS, and safety loops online when standard cables fail.

Fire-Barrier Construction for Circuit Integrity Under Fire

Mica-glass tape over the primary conductor ensures that the cable delivers circuit integrity for a defined period under direct flame (typically following IEC 60331 or BS 6387). In real terms, emergency valves still receive a close command. Personnel can still read a critical sensor. Any fire-rated building, tunnel, or process plant that relies on active fire protection works because the signal path survives.

Copper Tape Screen Against Crosstalk and EMI

An overlapped solid copper tape shield under an extruded bedding provides 100% coverage across the frequency range that matters most for 4–20 mA loops and low-voltage digital buses. Field data shows fewer signal excursions, fewer unexplained I/O faults, and fewer mid-shift troubleshooting calls. For procurement, this means less time wasted arguing whether the cable is the source of the problem.

Galvanized Steel Wire Armour That Eliminates Separate Conduit

Double-layer galvanized steel tape armour (the “22” designation) lets you pull this cable direct into below-ground ducts, cable trenches, and exposed outdoor racks without adding heavy-gauge steel conduit. Site crews install faster. The cable resists crush, rodent attack, and accidental impact. The bill of materials drops accordingly.

PE Insulation Tailored to Long Cable Runs

Solid polyethylene insulation keeps mutual capacitance low and insulation resistance high over several hundred metres. On petrochemical sites where junction boxes are spread across a sprawling plot, that translates to a clean signal at the remote marshalling cabinet—without the need for in-line amplifiers that add cost and failure points.

Fully Customizable Core Counts, Screen Arrangements, and Sheath Compounds

No forced catalogue compromise. Your spec sheet drives the build: 1 pair, 2 pairs, up to 24 pairs; individual and overall screens; low-smoke zero-halogen (LSZH) or flame-retardant PVC outer sheath; pre-defined fire performance hours. The factory treats every drum as a project—same traceability, same test reports, regardless of whether you order 500 metres or a full container load.

Technical Construction Table

Parameters are confirmed against final project data. Below are typical structural elements of the N-DJYP2V22 family.

Where This Cable is Used—and What Problem It Solves

• Oil, Gas & Petrochemical Processing – Keeps emergency shutdown signals intact during a hydrocarbon fire, meeting fire-safety case requirements for unprotected cable routes.
• Thermal and Hydro Power Stations – Protects DCS and turbine supervisory cables laid in cable galleries that can act as smoke and heat chimneys during a fire.
• Underground Metro & Rail Tunnels – Maintains public address, signalling, and fire detection circuits when ambient temperatures jump; steel armour removes the need for metal trunking in tight access shafts.
• High-Rise Commercial & Hospital Buildings – Supplies life-safety systems (smoke extraction fans, pressurization dampers) with a cable route that will not collapse electrically before phased evacuation completes.
• Steel Mills and Smelters – Resists conducted EMI from nearby high-current arc furnaces while surviving radiant heat that would soften a non-fire-rated data cable in minutes.

Compliance & QA Baseline

• ✅ Full type-test certificate package per client-specified standard (IEC, BS, VDE)
• ✅ Flame retardance: IEC 60332-1 / IEC 60332-3 (where applicable to the sheath compound)
• ✅ Fire resistance: IEC 60331-21 / BS 6387, test reports with serial-number traceability
• ✅ Low Smoke Zero Halogen (LSZH) sheaths: IEC 60754-1/2, IEC 61034-2
• ✅ RoHS 3 (EU 2015/863) compliance for all wetted materials
• ✅ CE marking under the Low Voltage Directive 2014/35/EU
• ✅ ISO 9001:2015 quality management system across manufacturing and pre-shipment inspection

Questions Field Engineers & Buyers Search Before Specifying

What does the name N-DJYP2V22 actually decode to?
N = fire-resistant (mica tape layer). D = computer/instrumentation conductor. J is deliberately omitted in some factories but indicates a flame-retardant PE compound or a specific stranding; confirm the exact bill of materials with the mill certificate. Y = polyethylene insulation. P2 = overall copper tape screen. V = PVC inner sheath and outer jacket. 22 = double steel tape armour. Once the build is locked, the physical sample matches that label every time.

Can this cable be buried directly without additional protection?
Yes. The flat galvanized steel tape armour is designed for direct burial and concrete embedding, provided the installation complies with local depth and bedding requirements. If the soil is particularly corrosive, we recommend a PVC or PE over-sheath with a thicker wall, which the factory can apply on the same production line.

What is a realistic delivery window for a custom-configured drum?
For a new construction with non-stock core counts, 4 to 6 weeks ex-works is normal. Repeat orders with an active QA dossier ship faster. The factory holds a strategic buffer of copper tape, mica, and PE compound, so raw material access rarely delays the schedule. Urgent partial shipments can be negotiated before the full run is complete.

Request a Data Sheet and Project-Specific Quotation

Share your core count, screen arrangement, fire-rating duration, and sheath type needed. You will receive a complete technical data sheet, a certified single-line construction drawing, and a landed-cost quotation within one working day. Contact our engineering desk directly at [email/phone] or use the enquiry form to start without an email thread.