1 / 5

Product

RS-485 / RS-422 & JIS Shipboard Communication CablesJIS C 3410 · 250 V PE Dielectric≤ 55 pF/m · ≥ 1000 MΩ·kmTTPY / Braided TTPYC / TTPYCY

TTPY / TTPYC / TTPYCY Shipboard Communication CableJIS C 3410 250 V low-capacitance PE-insulated 1P to 30P × 0.75 / 1.25 mm² TTPY, TTPYC &

TTPY / TTPYC / TTPYCY Shipboard Communication Cable is the JIS C 3410 250 V marine telephone, intercom, and NMEA/serial data cable utilizing low-permittivity polyethylene ('P') core insulation to achieve ≤ 55 pF/m mutual capacitance and ≥ 1,000 MΩ·km

Flame-retardant

Oil-resistant

Water-resistant

EMC screen

Configuration

Order designation: TTPYCY 2P×0.75 mm² (1Q / 4 cores) JIS C 3410
Outer Ø ≈: 11.6 mm
Copper weight: 28 kg/km
Total weight ≈: 210 kg/km
Min. bend R (fixed): 70 mm

All sizes (6)

Request a quote Datasheet WhatsApp

Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

Standard: JIS C 3410
Rated voltage: 250 V AC
Capacitance: ≤ 55 pF / m
Insulation R: ≥ 1,000 MΩ·km
Sizes: 1P–30P · 0.75/1
Armour types: TTPY / C / CY

Typical values for this cable type, based on JIS C 3410 (TTPY / TTPYC / TTPYCY Low-Loss PE Shipboard) — confirmed in the datasheet and quotation for your order.

Application fit

Is TTPY / TTPYC / TTPYCY right for your machine?

Selected for long-run shipboard automatic telephone exchanges (PABX), sound-powered telephones, public address (PA/GA) trunks, and NMEA 0183 / serial bridge instrumentation where low line

Fixed installation

Suitable

Low-capacitance PE dielectric preserves voice clarity and serial pulse edges over 200 m+ vessel-length runs.

Switchgear & control cabinet wiring

Suitable

High insulation resistance (≥ 1,000 MΩ·km) prevents leakage on batteryless sound-powered marine telephone circuits.

Immersion & wet locations

Suitable

TTPYCY PVC outer oversheath protects the galvanized steel or copper wire braid against bilge water and salt spray.

Energy chain / drag chain

Not suitable

Fixed shipboard cable per JIS C 3410; not intended for continuous linear drag chains.

PROFINET Type C

Typical machinesLNG carriers, container ships & tankersSound-powered & PABX marine telephonesBridge NMEA 0183 & gyrocompass trunksOffshore support & naval auxiliary vessels

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 low-loss polyethylene (PE, 75 °C)

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Stranded tinned copper conductors	7/0.37 mm (0.75 mm²) or 7/0.48 mm (1.25 mm²) annealed tinned copper per JIS C 3410JIS C 3410
2	Low-loss polyethylene (PE) insulation	Solid polyethylene ('P') core insulation (75 °C, εr ≈ 2.3) yielding ≤ 55 pF/m and ≥JIS C 3410
3	Flame-retardant PVC inner sheath (TTPY)	Marine-grade flame-retardant PVC sheathJIS C 3410
4	Wire braid armour (TTPYC / TTPYCY)	Galvanized steel wire braid (GSWB) or non-magnetic tinned copper wire braid (TCWB)JIS C 3410
5	Protective PVC oversheath (TTPYCY)	Oil- and flame-retardant PVC outer protective sheath per IEC 60332-3-22 Cat AJIS C 3410 / IEC 60332-3-22

TTPY (Unarmoured PE/PVC)

Low-capacitance multi-pair telecom cable for indoor bridge, radio room, and cabin wiring.

TTPYC & TTPYCY (Wire-Braid Armoured & Oversheathed)

Braided armour (TTPYC) and PVC-oversheathed (TTPYCY) for main deck trunks and machinery spaces.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on JIS C 3410 (TTPY / TTPYC / TTPYCY Low-Loss PE Shipboard). Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U: 250 V AC
Characteristic impedance Z0: 105 Ω ± 15 Ω (100 kHz to 1 MHz)
Max. DC conductor resistance @ 20 °C: ≤ 26.3 Ω/km (0.75 mm²) · ≤ 15.6 Ω/km (1.25
Mutual capacitance @ 1 kHz: ≈ 50 pF/m (≤ 55 nF/km)
Velocity of propagation (VoP): ≈ 66 % (0.66 c)
Insulation resistance & test V: ≥ 1,000 MΩ·km @ 20 °C · 1,500 V AC / 1 min

Thermal

Max. conductor operating temp.: +75 °C (Polyethylene dielectric per JIS C
Ambient installation temperature: -20 °C to +60 °C

Mechanical

Min. bending radius: 6 × D fixed installation
Wire braid armour: 0.30 mm galvanized steel or tinned copper

Resistance

Bunched flame retardancy: IEC 60332-3-22 Category A & IEC 60332-1-2
Oil & salt-mist resistance: JIS C 3410 marine fluid resistance

Reference standards

Primary specification: JIS C 3410 (TTPY / TTPYC / TTPYCY)
Classification societies: ClassNK, DNV, ABS, LR, BV, KR

Identification

Core & pair identification: Colour-coded and number-printed pairs/quads
Outer sheath colour: Grey or Black

Sizes

6 standard configurations (TTPY / TTPYC / TTPYCY)

Nominal dimensions, copper weights, impedance and transmission parameters for TTPY / TTPYC / TTPYCY per JIS C 3410 (TTPY / TTPYC / TTPYCY Low-Loss PE

Dimensions & weights
Order designation	Configuration	Conductor size	Outer Ø ≈ mm	Copper kg/km	Weight ≈ kg/km	Min. bend R fixed mm
Standard TTPY / TTPYC / TTPYCY configurations
TTPYCY 1P×0.75 mm² (2 cores) JIS C 3410	1P×0.75 mm² (TTPYCY)	0.75 mm² (7/0.37)	10.8	14	175	65
TTPYCY 2P×0.75 mm² (1Q / 4 cores) JIS C 3410	2P (1Q)×0.75 mm² (TTPYCY)	0.75 mm² (7/0.37)	11.6	28	210	70
TTPYCY 4P×0.75 mm² (2Q / 8 cores) JIS C 3410	4P (2Q)×0.75 mm² (TTPYCY)	0.75 mm² (7/0.37)	14.8	56	335	89
TTPYCY 7P×0.75 mm² (14 cores) JIS C 3410	7P×0.75 mm² (TTPYCY)	0.75 mm² (7/0.37)	17.2	98	455	103
TTPYCY 10P×0.75 mm² (20 cores) JIS C 3410	10P×0.75 mm² (TTPYCY)	0.75 mm² (7/0.37)	20.6	140	615	124
TTPYCY 2P×1.25 mm² (1Q / 4 cores) JIS C 3410	2P (1Q)×1.25 mm² (TTPYCY)	1.25 mm² (7/0.48)	12.8	47	255	77

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 (TTPY / TTPYC / TTPYCY Low-Loss PE Shipboard).

Impedance, capacitance & attenuation
Configuration	Impedance Z0	Max. DC R @ 20 °C Ω/km	Mutual C pF/m ≈	VoP %	Attenuation @ 20 °C dB/100m	Dielectric test V
1P×0.75 mm² (TTPYCY)	105 Ω	52.6	50.0	66	0.52 dB/100m @ 100 kHz	1,500
2P (1Q)×0.75 mm² (TTPYCY)	105 Ω	52.6	50.0	66	0.52 dB/100m @ 100 kHz	1,500
4P (2Q)×0.75 mm² (TTPYCY)	105 Ω	52.6	50.0	66	0.52 dB/100m @ 100 kHz	1,500
7P×0.75 mm² (TTPYCY)	105 Ω	52.6	50.0	66	0.52 dB/100m @ 100 kHz	1,500
10P×0.75 mm² (TTPYCY)	105 Ω	52.6	50.0	66	0.52 dB/100m @ 100 kHz	1,500
2P (1Q)×1.25 mm² (TTPYCY)	100 Ω	31.2	52.0	66	0.42 dB/100m @ 100 kHz	1,500

Transmission values (characteristic impedance Z0, mutual capacitance, VoP, and attenuation) are measured at +20 °C per JIS C 3410 (TTPY / TTPYC / TTPYCY Low-Loss PE Shipboard).

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.

ConductorClass 5 stranding
Spark test100 % in-line
Lay-upCores, earth, fillers
SheathingInner, braid / screen, outer
Electrical testsAC voltage, resistance
DimensionsOD, wall thickness
Inspection documents & dispatchDrum & dispatch

Testing & inspection	Test value / reference	Frequency
Routine tests
1.5 kV AC dielectric & ≥ 1,000 MΩ·km IR test	1,500 V AC / 1 min; IR ≥ 1,000 MΩ·km at 20 °C	100 % of reels
DC conductor resistance & mutual capacitance	≤ 26.3 / 15.6 Ω/km; capacitance ≤ 55 nF/km at 1 kHz	100 % of reels
Sample tests
Attenuation & pair crosstalk at 100 kHz	Low-loss voice & NMEA 0183 serial transmission check	Per production batch
IEC 60332-3-22 Cat A bunched vertical flame test	Pass Category A marine bunched fire test	Class 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 TTPY / TTPYC

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

PDFTTPY / TTPYC / TTPYCY Shipboard Communication Cable – technical datasheet6 sizes · construction, technical data, approvals XLSXTTPY / TTPYC / TTPYCY spec data (Excel)All 6 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 does the 'P' in TTPY / TTPYC / TTPYCY signify compared with TTY?

In JIS C 3410 nomenclature, 'P' stands for Polyethylene core insulation (replacing the EPR rubber of TTY). Polyethylene has a much lower dielectric constant (εr ≈ 2.3 vs. 3.2 for EPR), cutting mutual capacitance from ~90 pF/m down to ~50 pF/m and raising insulation resistance above 1,000 MΩ·km.

When should a marine electrical designer choose TTPYCY over TTYCY?

Specify TTPYCY for long-distance voice/PABX lines, batteryless sound-powered telephones, public address audio trunks, and NMEA 0183 (RS-422) navigation data runs in accommodation, cargo, and deck spaces where ambient temperature stays within the 75 °C PE rating. Use 90 °C EPR-insulated TTYCY in high-ambient boiler and purifier rooms.

Does TTPYCY pass the IEC 60332-3-22 Category A bunched flame test despite having PE core insulation?

Yes. Both the inner sheath and the outer protective oversheath are extruded from high-oxygen-index flame-retardant marine PVC over the metallic wire braid, enabling the completed TTPYCY cable to pass the IEC 60332-3-22 Category A vertical tray flame test. 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.

What if my NMEA or bridge automation signal also requires an electrostatic foil screen?

If collective or individual pair electrostatic screening is required alongside JIS C 3410 construction, specify our overall-screened TTYS / TTYCS / TTYCYS (or TTPYS) series or our individually pair-screened TTY-S / TTYC-S / TTYCY-S series. 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 TTPY / TTPYC / TTPYCY

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.

Reel typeDrum core diameter (mm)Cable length on drum (m)Travel speed (m/min)Max. accelerationCycles per hourLength and quantityAmbient temperatureExposure (outdoor, water, oil, abrasion)Destination countryEquipment and operating conditions

03Message for our engineers

TTPY / TTPYC / TTPYCY 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

Datasheet Request a quote

TTPY / TTPYC / TTPYCY Shipboard Communication CableJIS C 3410 250 V low-capacitance PE-insulated 1P to 30P × 0.75 / 1.25 mm² TTPY, TTPYC &

Fixed installation

Switchgear & control cabinet wiring

Immersion & wet locations

Energy chain / drag chain

TTPY (Unarmoured PE/PVC)

TTPYC & TTPYCY (Wire-Braid Armoured & Oversheathed)

Electrical

Thermal

Mechanical

Resistance

Reference standards

Identification

Inspection certificate

Product approvals

Company certificates

01Selected sizes

02Reel & motion

03Message for our engineers

TTY / TTYC / TTYCY

TTYS / TTYCS / TTYCYS

TTY-S / TTYC-S / TTYCY-S

RS-422 / RS-485