Control & Instrumentation Cables

Electromagnetically shielded cables for noise-free analog signals, digital I/O, transducer wiring and BMS networks

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Control & Instrumentation Cables

Industrial automation plants, pumping stations, and BMS building networks depend on low-noise signal transmission between field instruments and PLC control panels. Nairobi Power Engineers stocks and supplies high-specification Control & Instrumentation Cables conforming to BS 5308 (Part 1 and Part 2) and BS EN 50288-7.

Available in multi-core (numbered cores for control relay circuits) and twisted multi-pair configurations with individual and collective aluminium/polyester foil shielding (CAM/ICAM) and tinned copper drain wires, our cables eliminate electromagnetic interference (EMI) from adjacent power switchgear.

Equipment & Range Highlights

Signal Shielding • BS 5308

Conceptual control & instrumentation cables scene; exact specifications vary.

Twisted Pair Instrumentation Cables (CAM/ICAM)

Overall screened (CAM) and individually screened pairs (ICAM) with drain wires for 4-20mA, 0-10V, RTD, and thermocouple signals.

Pairs1 Pair to 50 Pairs (0.5mm²–2.5mm²)

ScreenAl-PET Foil Screen + Drain Wire

StandardBS 5308 Part 1 (PE) / Part 2 (PVC)

Numbered Cores • YY / CY / SY

Conceptual control & instrumentation cables scene; exact specifications vary.

Flexible Multi-Core Machine Control Cables

Flexible numbered control cables (YY unshielded, CY tinned copper braid shielded, SY steel wire braided) for machine wiring and pushbuttons.

Cores2 to 61 Numbered Cores

BraidTinned Copper (CY) / Steel (SY)

Voltage300 / 500 V

Instrumentation Cable Technical Data

Cable Type	Conductor Sizes	Screening Type	Typical Applications
BS 5308 Part 1 Type 1	0.5 mm², 0.75 mm², 1.5 mm²	Overall Collective Screen (CAM)	Indoor 4-20mA sensor wiring in ducts
BS 5308 Part 1 Type 2 (SWA)	0.5 mm², 0.75 mm², 1.5 mm²	CAM + Galvanised Steel Wire Armour	Underground & outdoor field instrument trenches
BS 5308 Part 2 (PVC)	0.5 mm², 0.75 mm², 1.5 mm²	Individual & Collective Screen (ICAM)	High-noise environments with mixed analog signals
CY Flexible Screened	0.75 mm² to 4.0 mm² (2–36 core)	Tinned Copper Wire Braid (85% coverage)	VFD motor feedback, encoders, PLC digital I/O
RS485 Data Bus Cable	24 AWG (1 Pair / 2 Pair 120Ω)	Al-Foil + Tinned Braid (Double Screen)	Modbus RTU, BACnet, Profibus DP serial buses

Engineering & Build Highlights

Twisted pairs with short lay lengths cancel inductive magnetic coupling and cross-talk between channels
100% coverage aluminium-polyester screening tape diverts high-frequency electromagnetic noise to earth
Tinned copper drain wire provides continuous, low-resistance termination to panel shield earth busbars
High-grade polyethylene (PE) or XLPE insulation delivers low capacitance for long-distance signal integrity
Armoured (Type 2 SWA) variants allow direct burial alongside high-voltage power cables in civil trenches
Oil-resistant and flame-retardant outer sheaths withstand harsh industrial chemicals and lubricants

Target Applications & Sectors

PLC / SCADA digital and analog input/output loopsPressure, flow, temperature, and level transducer wiringModbus RTU (RS485) and Profibus industrial fieldbusesMotor control centre starter control and interlock wiringBuilding Management System (BMS) HVAC sensor networksFire alarm, gas detection and emergency shutdown circuits

For low-frequency analog signals (e.g. 4-20mA transducers), cable screens should be grounded at ONE end only (at the PLC panel earth bus) to prevent circulating ground loops. For high-frequency data (VFDs, Profibus), 360-degree grounding at both ends is recommended.

Using 1.5 mm² screened twisted-pair cable (BS 5308), 4-20mA current signals can be transmitted accurately over distances exceeding 1,000 meters with zero signal degradation.

Source Control & Instrumentation Cables

Send your instrument loop schedules or pair counts for immediate quotation and fast dispatch in Nairobi.

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