Shielded PVC Flexible Cable

Tinned Copper Braid for Real EMI Rejection

The shield braid is the defining feature — without it the cable is just RVV and rejects no EMI at all. Tinned copper braid at 70 to 85 percent coverage density blocks induced interference from nearby mains wiring, fluorescent ballasts, mobile-phone transmitters, and wireless equipment. Critical for analog audio, balanced microphone lines, and low-current control signals where induced noise corrupts the signal at the destination.

Class 5 Flexibility, 15× OD Bend Radius

Fine-strand Class 5 copper construction allows minimum bending radius of 15× OD per JB/T 8734.5 — tighter than industrial KVVP’s 12× OD because the smaller cable diameter compensates for the stricter strand-bending constraint. In practical terms, RVVP routes through 90-degree corners inside equipment chassis, behind wall plates, and through conduit boxes that wouldn’t accept rigid KVVP. Easier to install in retrofit work where existing conduit must be reused.

300/300V or 300/500V Insulation

Rated 300/300V (standard RVVP) or 300/500V (heavier variant) per IEC 60227 — appropriate for signal-level circuits (24V DC, 4-20 mA, audio, video baseband) and light control circuits (24V or 110V relay coil supplies). For higher-voltage control circuits up to 230V AC or 400V three-phase, use the heavier KVVRP / KVVP family. Choosing the right voltage class keeps cable cost down without sacrificing safety margin.

2 to 19 Cores in a Small-Diameter Cable

Multi-core construction without the bulk of industrial KVVP. A 7-core RVVP 0.5 mm² runs about 7 mm OD vs a 12-core KVVP at the same cross-section running about 12 mm OD — the difference matters when routing through wall plates, conduit fittings, and equipment chassis. The 2 to 8 core range covers most common commercial signal applications; higher core counts up to 19 cores available for multi-channel audio, multi-zone alarm systems, and similar applications.

Lower Cost Than Industrial KVVP

RVVP unit cost is typically 50 to 70 percent of equivalent core-count KVVP because of the smaller conductor cross-sections, lighter insulation walls, and thinner sheath. For commercial-grade signal applications where the heavier industrial rating isn’t needed, this is real savings on bulk orders — spend the difference on better connectors and termination labour rather than on over-specified cable.

Twisted-Pair Variants for Balanced Signals

RVSP (twisted pair without overall shield) for short-distance RS-485, balanced audio, and similar differential signal applications. RVVPS (twisted pair PLUS overall braid shield) for the most demanding analog applications where both differential-mode noise rejection and common-mode shielding matter. The twisted-pair construction reduces cross-talk between channels and improves common-mode noise rejection at the differential receiver — essential for microphone-level audio and long-line analog signals.

For analog audio, video baseband, microphone signals, and 4-20 mA loops, earth the cable shield at the receiving / control room end only — never both ends. Earthing both ends creates a ground loop that injects mains-frequency hum into the signal. For digital differential signals (RS-485, RS-422), both-end earthing through proper EMC connectors is the standard approach. The shield must always be earthed somewhere — a floating shield provides no EMI rejection benefit.

Even shielded RVVP picks up some interference when run parallel to mains power cables for long distances — the shield reduces but doesn’t eliminate induced noise. Maintain at least 100 mm separation between RVVP signal cables and AC mains cables wherever possible; cross at 90 degrees rather than running parallel. For runs through structured cabling pathways, use the dedicated signal-cable tray with metal-tray separation from power cable tray.

Class 5 fine-strand copper terminates best with crimped pin connectors, ring lugs, or ferrule-and-screw-terminal combinations. Solder joints on fine-strand copper concentrate mechanical stress at the joint root and fatigue-fracture over time — particularly bad for cables that see vibration. For RJ-style connectors on RVVP cables used as data cables, use the proper crimp tool for the specific connector type rather than improvising with pliers. Loose connections at terminations cause intermittent signal problems that are very hard to diagnose in the field.

RVVP minimum bending radius is 15× OD per JB/T 8734.5. Tighter bends during cable pulling permanently damage the braid shield — individual braid wires fracture and gaps open up in shield coverage. The damage is invisible from outside but shows up as intermittent noise pickup months or years later. Particularly important at panel entry points and connector backshells where space is constrained; use proper service loops rather than forcing tight bends.

Test conductor-to-conductor continuity (resistance check, expected within nominal cable resistance) and insulation resistance (megger test at 500V DC, expected > 100 MΩ per km) between every core and earth, and between adjacent cores, before placing cable into service. RVVP is more vulnerable than KVVP to insulation damage from over-tight bends and pinch points because the wall thickness is smaller; testing catches problems before they cause intermittent signal failures in service.

Multi-core RVVP installations routinely have 6, 8, or 19 cores carrying different signals to different equipment — identifying which core goes where during a fault-finding call out is nearly impossible without clear labelling. Use heat-shrink cable labels at both ends of every cable run, individual core ferrule sleeves printed with the signal function (e.g., “CAM-3 VIDEO+”), and maintain the cable schedule documentation in the project handover package. The five minutes of labelling at installation pays back many times over in maintenance time savings.