1 / 5

Product

RS-485 / RS-422 & JIS Shipboard Communication CablesJIS C 3410 · 250 V Marine1P to 30P × 0.75 / 1.25 mm²TTY / Braided TTYC / TTYCY

TTY / TTYC / TTYCY Shipboard Communication CableJIS C 3410 250 V EPR-insulated 1P to 30P × 0.75 / 1.25 mm² TTY, braided TTYC &

TTY / TTYC / TTYCY Shipboard Communication Cable is manufactured to JIS C 3410 (250 V rating) with 90 °C ethylene-propylene rubber (EPR) insulated tinned copper twisted pairs or star-quads (0.75 mm² and 1.25 mm²) and a flame-retardant PVC sheath, supplied

Flame-retardant
Oil-resistant
Water-resistant
EMC screen
Order designation
TTYCY 2P×0.75 mm² (1Q / 4 cores) JIS C 3410
Outer Ø ≈
12.0 mm
Copper weight
28 kg/km
Total weight ≈
225 kg/km
Min. bend R (fixed)
72 mm
All sizes (7)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Standard
JIS C 3410
Shipboard telecom & signal cable
Rated voltage
250 V AC
1.5 kV AC / 1 min dielectric test
Insulation
90 °C EPR Rubber
Ethylene-propylene rubber cores
Pair & size range
1P–30P · 0.75/1
Twisted pairs or 1Q–19Q star-quads
Armour options
TTY / TTYC
Unarmoured · GS/Cu Braid · Oversheath
Class approvals
NK / DNV / ABS
IEC 60332-3-22 Cat A flame

Typical values for this cable type, based on JIS C 3410 (TTY / TTYC / TTYCY Shipboard Communication) — confirmed in the datasheet and quotation for your order.

Application fit

Is TTY / TTYC / TTYCY right for your machine?

Engineered for marine bridge navigation consoles, engine-room telegraph and intercom systems, general alarm circuits, and internal shipboard telephone exchanges on commercial vessels and workboats.

Fixed installation

Suitable

TTYC and TTYCY wire-braid armoured versions install directly on open shipboard cable ladders and bulkheads.

Switchgear & control cabinet wiring

Suitable

Unarmoured TTY routes cleanly inside bridge consoles, radio rooms, and accommodation switchboards.

Immersion & wet locations

Suitable

TTYCY adds a waterproof, oil-resistant PVC outer protective sheath over the wire braid for wet machinery spaces and decks.

Energy chain / drag chain

Not suitable

Fixed marine installation cable per JIS C 3410; not designed for dynamic energy chains.

PROFINET Type C
Typical machinesCommercial shipbuilding (NK, DNV, ABS, LR)Bridge navigation & engine telegraphsShipboard PA, general alarm & intercomMarine auxiliary machinery instrumentation

Construction

Layer by layer

Stranded annealed tinned copper conductors (0.75 mm² = 7/0.37 mm; 1.25 mm² = 7/0.48 mm) insulated with 90 °C EPR rubber, twisted into

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Stranded tinned copper conductors7/0.37 mm (0.75 mm²) or 7/0.48 mm (1.25 mm²) annealed tinned copper per JIS C 3410JIS C 3410
2EPR rubber insulation (90 °C)Cross-linked ethylene-propylene rubber (EP) insulation rated for 90 °C continuousJIS C 3410
3Flame-retardant PVC inner sheath (TTY)Lead-free marine PVC sheath per JIS C 3410JIS C 3410
4Wire braid armour (TTYC / TTYCY)Galvanized steel wire braid (GSWB) or tinned copper wire braid (TCWB) for mechanical &JIS C 3410
5Protective PVC oversheath (TTYCY)Oil-, salt-mist-, and flame-retardant PVC outer sheath over the wire braidJIS C 3410 / IEC 60332-3-22

TTY (Unarmoured EPR/PVC)

Lightest JIS C 3410 250 V multi-pair communication cable for dry accommodation and console interiors.

TTYC & TTYCY (Wire-Braid Armoured & Oversheathed)

Braided armour (TTYC) and PVC-oversheathed (TTYCY) for engine rooms, open cableways, and weather decks.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on JIS C 3410 (TTY / TTYC / TTYCY Shipboard Communication). Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U
250 V AC
Audio/telecom impedance Z0
≈ 100 Ω (nominal balanced pair)
Max. DC conductor resistance @ 20 °C
≤ 26.3 Ω/km (0.75 mm²) · ≤ 15.6 Ω/km (1.25
Mutual capacitance @ 1 kHz
≈ 85–100 nF/km (EPR dielectric)
Insulation resistance @ 20 °C
≥ 300 MΩ·km
AC dielectric test voltage
1,500 V AC for 1 minute

Thermal

Max. conductor operating temp.
+90 °C (EPR insulation per JIS C 3410)
Ambient installation temperature
-20 °C to +60 °C

Mechanical

Min. bending radius
6 × D (TTY / TTYC / TTYCY)
Armour wire diameter (TTYC/TTYCY)
0.30 mm galvanized steel or tinned annealed

Resistance

Bunched flame retardancy
IEC 60332-3-22 Category A & IEC 60332-1-2
Marine oil & salt-fog resistance
JIS C 3410 / IEC 60092-350 marine environment

Reference standards

Primary specification
JIS C 3410 (Cables for shipboard electrical
Classification societies
ClassNK, DNV, ABS, Lloyd's Register (LR)

Identification

Core & pair identification
White & Red (Pair) or White, Yellow, Red
Outer sheath colour
Grey or Black

Sizes

7 standard configurations (TTY / TTYC / TTYCY)

Nominal dimensions, copper weights, impedance and transmission parameters for TTY / TTYC / TTYCY per JIS C 3410 (TTY / TTYC / TTYCY Shipboard Communication).

Dimensions & weights
Order designationConfigurationConductor sizeOuter Ø ≈
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard TTY / TTYC / TTYCY configurations
TTYCY 1P×0.75 mm² (1Q / 2 cores) JIS C 34101P×0.75 mm² (TTYCY)0.75 mm² (7/0.37)11.21419067
TTYCY 2P×0.75 mm² (1Q / 4 cores) JIS C 34102P (1Q)×0.75 mm² (TTYCY)0.75 mm² (7/0.37)12.02822572
TTYCY 4P×0.75 mm² (2Q / 8 cores) JIS C 34104P (2Q)×0.75 mm² (TTYCY)0.75 mm² (7/0.37)15.55636093
TTYCY 7P×0.75 mm² (14 cores) JIS C 34107P×0.75 mm² (TTYCY)0.75 mm² (7/0.37)18.098490108
TTYCY 10P×0.75 mm² (20 cores) JIS C 341010P×0.75 mm² (TTYCY)0.75 mm² (7/0.37)21.5140660129
TTYCY 2P×1.25 mm² (1Q / 4 cores) JIS C 34102P (1Q)×1.25 mm² (TTYCY)1.25 mm² (7/0.48)13.24727579
TTYCY 4P×1.25 mm² (2Q / 8 cores) JIS C 34104P (2Q)×1.25 mm² (TTYCY)1.25 mm² (7/0.48)17.294445103
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal factory values subject to ±5 % manufacturing tolerance per JIS C 3410 (TTY / TTYC / TTYCY Shipboard Communication).

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
1.5 kV AC dielectric & insulation resistance1,500 V AC / 1 min; IR ≥ 300 MΩ·km at 20 °C100 % of reels
DC conductor resistance @ 20 °C≤ 26.3 Ω/km (0.75 mm²) · ≤ 15.6 Ω/km (1.25 mm²) per JIS C 3410100 % of reels
Sample tests
EPR hot-set & thermal aging at +90 °CJIS C 3410 mechanical retention after agingPer production batch
IEC 60332-3-22 Cat A bunched vertical flame testChar height ≤ 2.5 m under 40 min burner testClass society approval

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

JIS C 3410ClassNK / DNV / ABS / LRIEC 60332-3-22 Cat A

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX JIS C 3410 250V TTY / TTYC
Delivery form
Non-returnable plywood reels or export drums
Standard reel lengths
100 m · 305 m · 500 m · 1000 m
MOQ
100 m (stock variants) · 500 m (custom)
Lead time
2–3 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFTTY / TTYC / TTYCY Shipboard Communication Cable – technical datasheet7 sizes · construction, technical data, approvalsXLSXTTY / TTYC / TTYCY spec data (Excel)All 7 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What do the letters TTY, TTYC, and TTYCY stand for under JIS C 3410?
In the JIS C 3410 shipboard designation code, 'TT' denotes a 250 V telephone/telegraph communication cable with 90 °C EPR rubber core insulation, 'Y' denotes the PVC sheath, 'C' adds a galvanized steel or tinned copper wire-braid armour over the sheath, and the final 'Y' in TTYCY adds an outer protective PVC oversheath over the armour.
How does TTY differ from TTPY shipboard communication cable?
TTY uses 90 °C cross-linked ethylene-propylene rubber (EPR) core insulation for higher thermal margin in hot machinery spaces, whereas TTPY uses 75 °C polyethylene ('P') core insulation for lower dielectric capacitance (≤ 55 nF/km) and lower high-frequency attenuation on long telephone and serial audio trunks.
When should I specify galvanized steel wire braid vs. tinned copper wire braid on TTYC/TTYCY?
Galvanized steel wire braid (GSWB) provides maximum mechanical impact and rodent/crush protection along engine rooms and cargo holds. Non-magnetic tinned copper wire braid (TCWB) is specified within the wheelhouse magnetic-compass safe-distance zone and where enhanced high-frequency EMI shielding is required. Each production reel undergoes 100 % characteristic impedance verification, mutual capacitance and DC loop resistance testing, and dielectric spark/withstand inspection before dispatch with an EN 10204 3.1 certificate.
Are pairs laid up as twisted pairs (P) or star-quads (Q) in JIS C 3410 TTY cables?
JIS C 3410 allows both: 1-pair (1P) cables are twisted pairs, while 2-pair (1Q) through 38-pair (19Q) cables are traditionally laid up as space-saving 4-core star-quads (White/Red = Pair 1, Yellow/Blue = Pair 2) or as individual twisted pairs per shipyard specification. Each production reel undergoes 100 % characteristic impedance verification, mutual capacitance and DC loop resistance testing, and dielectric spark/withstand inspection before dispatch with an EN 10204 3.1 certificate.

Request a quote

Get an engineering quote for TTY / TTYC / TTYCY

Your selection and application details are copied into the enquiry form below.

01Selected sizes

Use + Add next to a size or configuration.

02Reel & motion

Add your operating conditions here to include them in your enquiry.

03Message for our engineers

TTY / TTYC / TTYCY Shipboard Communication Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:
Send via WhatsApp

JIS PE marine telecom

TTPY / TTPYC / TTPYCY

JIS C 3410 250 V PE-insulated low-loss shipboard communication cable

View productJIS collective-screened

TTYS / TTYCS / TTYCYS

JIS C 3410 250 V overall-screened marine communication & instrumentation cable

View productJIS pair-screened marine

TTY-S / TTYC-S / TTYCY-S

JIS C 3410 250 V individually pair-screened shipboard communication cable

View product120 Ω low-cap EIA-485

RS-422 / RS-485

TIA/EIA-422/485 120 Ω low-capacitance SF/UTP multi-pair serial data cable

View product
DatasheetRequest a quote