ZA-NH-DJYVP Cable | Flame-Retardant Fire-Resistant Shielded Instrumentation Cable

Signal failure during a fire event isn’t just a malfunction. It’s a safety liability that can lead to cascading equipment damage, regulatory fines, and direct personnel risk. When emergency shutdown systems or critical instrumentation loops go silent because the cable jacket failed, the cost is measured in downtime hours and potential asset loss. The ZA-NH-DJYVP cable eliminates this failure point. It combines A-class flame retardance with fire-resistant circuit integrity under direct flame, wrapped in a precision shielding layer that blocks electromagnetic interference. This means your data transmission remains stable during normal operation and intact during an incident. No false trips. No lost signals.

This is not a generic control cable. It is engineered for process automation environments where signal accuracy and fire survival are mandatory design requirements. Procurement groups sourcing for petrochemical plants, high-rise commercial cores, or transit infrastructure will recognize the immediate value: one cable specification that satisfies both the instrumentation engineers demanding clean signal-to-noise ratios and the safety auditors checking fire code compliance. That dual qualification simplifies the bill of materials and reduces the inventory lines a project must carry.

Fire Integrity Without Signal Compromise
The most common trade-off in fire-rated wiring is signal degradation. Adding flame-retardant fillers and thick mica tapes often introduces capacitance imbalances that distort low-voltage analog signals. The ZA-NH-DJYVP construction solves this.

Double-Layer Fire Barrier with Mica Tape
The conductor is wrapped with a continuous layer of synthetic mica glass tape, a material with high dielectric strength that won’t carbonize into a conductive path under flame. A second supplementary mica layer acts as insurance. If the primary barrier is mechanically stressed during installation, the secondary layer maintains the dielectric. This dual-wall approach lets the cable maintain circuit integrity for 90 minutes at 750°C following IEC 60331 test protocols. Your emergency lighting controllers, smoke extraction fans, and fire pump instrumentation keep communicating when they are needed most.

Foil-Braid Hybrid Shield for High-EMI Zones
A single aluminum foil wrap works for clean environments. It doesn’t work on a refinery platform with variable frequency drive harmonics bleeding across cable trays. We pair a precision-applied aluminum/polyester foil with a tinned copper braid shield. The foil blocks high-frequency radiated noise. The braid handles low-frequency conducted interference and provides a low-impedance drain path to ground. This hybrid approach consistently delivers a transfer impedance below 10 mΩ/m, ensuring 4-20 mA loop signals stay clean even when routed adjacent to motor supply cables. For the field engineer, this means the DCS reads true process variables. No more mystery spikes on the trend logger.

A-Class Flame Retardance for Dense Cable Bundles
Vertical riser shafts in commercial buildings pack hundreds of cables into confined spaces. A single ignition source can propagate vertically along the entire tray if the jacket compound burns easily. The ZA category under GB/T 18380 means this cable passed Category A bunch-burning tests—the strictest tier for vertical tray flame spread. The specially formulated LSZH jacket material limits flame propagation distance to less than 1.5 meters, reduces smoke density to a transmittance above 80%, and emits no corrosive halogen gases. Facility managers gain precious extra minutes for evacuation and targeted fire suppression. Electrical contractors avoid the liability of toxic smoke damage to adjacent equipment rooms.

Stranded Copper Conductors for Vibration Resilience
Solid conductors snap under persistent low-amplitude vibration. Think of a compressor skid or a rail tunnel with frequent pressure waves. We use Class 2 stranded plain copper conductors throughout the ZA-NH-DJYVP range. The stranded geometry redistributes mechanical stress across multiple filaments, avoiding single-point fatigue fracture. This feature becomes critical in any installation where shutdowns for cable replacement cost more than the cable itself. As a result, the total lifecycle cost shifts downward—fewer reactive maintenance calls, fewer production stoppages.

Technical Specifications & Dimensions

The following parameters define the electrical and physical envelope of the standard supply. These values are guaranteed ex-factory and verified by routine testing on each production batch.

SpecificationParameter
Conductor MaterialStranded Plain Copper (Class 2)
InsulationCross-Linked Polyethylene (XLPE)
Fire BarrierDual-Layer Synthetic Mica Glass Tape
Collective ScreenAluminum/Polyester Foil + Tinned Copper Braid
Inner SheathLSZH Compound
Armor (Optional)Galvanized Steel Wire Braid (on request)
Outer SheathLSZH (Black / Red upon request)
Rated Voltage300/500V
Flame Retardance ClassIEC 60332-3-22 (Category A)
Fire Resistance RatingIEC 60331-21 (750°C / 90 min)
Smoke DensityIEC 61034-2 (≥80% transmittance)
Halogen ContentIEC 60754-1/2 (Zero Halogen)
Operating Temperature Range-15°C to +70°C (fixed installation)

Industry Applications & Scenario Validation

This cable enters specifications when environmental fire risk and signal integrity carry equal weight. The following applications represent the bulk of project demand globally.

Petrochemical & Refinery Processing
Signal cables run alongside process piping carrying volatile media. A cable jacket that propagates flame turns a small leak ignition into a rack-level fire. The ZA-NH-DJYVP is specified for connecting pressure transmitters, thermocouples, and gas detectors to the safety instrumented system (SIS). Its A-class retardance and 90-minute circuit integrity align with API RP 552 guidelines for control system installations in hydrocarbon service.

High-Rise Commercial & Mixed-Use Towers
Generator start signals, stairwell pressurization feedback, and HVAC damper actuator controls must outlast a fire on lower floors. Standard PVC cables collapse. This cable maintains the control signal path, ensuring life safety systems remain operational throughout the evacuation phase. The low-smoke property prevents obscuration of exit signage along egress routes.

Rail & Metro Tunnel Networks
Confined tunnel environments amplify any fire scenario into a mass casualty risk within minutes. Halogen-free materials are non-negotiable. The mica tape construction provides the requisite fire survival time for tunnel ventilation and evacuation lighting systems, while the shielded pair structure rejects electrical noise from traction power lines running parallel to the signal cables.

Power Generation & Substation Automation
Switchgear control circuits and transformer tap-changer monitoring require both noise immunity and fault containment. The foil-braid combination compresses electromagnetic interference from busbar fields, preventing nuisance tripping of protection relays. In the event of an internal arc fault, the fire-resistant layer ensures DC supply monitoring continues to report breaker status.

Water Treatment & Desalination Facilities
High humidity and occasional chemical splash demand a jacket that won’t hydrolyze. The XLPE insulation plus LSZH sheath resist moisture ingress and maintain insulation resistance above 5000 MΩ·km, even after prolonged exposure to 95% relative humidity. SCADA remote terminal unit signals remain accurate despite the aggressive atmosphere.

International Compliance & QA Standards

Our standard compliance package is designed to pre-qualify this product for global EPC tenders. Documentation is available in English for client submission.

✅ IEC 60332-3-22 — Category A vertical flame propagation test (bunched)
✅ IEC 60331-21 — Fire resistance at 750°C for 90 minutes under mechanical shock
✅ IEC 61034-2 — Smoke density measurement (≥80% light transmittance)
✅ IEC 60754-1/2 — Halogen acid gas emission test (zero halogen)
✅ IEC 60304 — Standard colors for low-frequency cables
✅ CE Marking — Low Voltage Directive 2014/35/EU
✅ RoHS 2 (2011/65/EU) — Restriction of hazardous substances
✅ ISO 9001:2015 — Certified factory quality management system

Factory material certificates, third-party test reports (TUV, SGS), and lot-specific traceability records are available upon request. We encourage client-side inspection at our facility before container loading.

FAQ

Can the mica tape cracking during tight-radius bending compromise the fire resistance?
This is a valid concern with rigid mica tape products. Our process uses a flexible muscovite mica paper bonded to a supporting glass fabric carrier. During the IEC 60331 fire test, the tape expands slightly when the binder is exposed to flame, sealing any micro-voids created by cold bending. We tested this with a bend radius down to 12 times the cable outer diameter without loss of circuit integrity. For critical installations, specify a larger installation radius or request a pre-qualification sample for on-site verification.

What’s the difference between a standard NH-YJV cable and the ZA-NH-DJYVP?
The NH-YJV is a power cable with a single mica layer and no overall shield. It delivers power. It does not protect millivolt or milliamp instrument signals from EMI. The ZA-NH-DJYVP is purpose-built for instrumentation and control wiring. It includes a dual mica barrier, a foil-braid counter-shield, and an XLPE dielectric optimized for low capacitance. Using a power cable for a PLC analog input introduces measurement drift and makes your fire resistance rating meaningless if the data is already corrupted.

How do you handle long-lead project timelines and custom color requirements?
We hold raw material stock for 90% of standard ZA-NH-DJYVP specifications, enabling a standard delivery of 3-4 weeks for volumes under 30 km. For project-specific outer sheath colors (red for fire alarm circuits, orange for intrinsically safe loops), add 5-7 working days to the lead time. We ship on steel-reinforced wooden drums with heat-shrunk wrapping for open-sea container transport. Partial shipments against a project payment milestone schedule are standard practice.

Translate your instrumentation reliability requirements into a qualified cable specification. Share your project’s cable schedule, routing conditions, and compliance region with our application engineers. We provide a complete technical deviation list, factory test plan, and landed cost breakdown within 48 hours. Request a sample, review the test documentation, and walk our production line before you commit. Reach us directly through the inquiry form on this page.