Oil & Gas
Electrical cable, cable management, motors and drives
CRS PLUS sources the electrical bill of materials for oil and gas, utility and industrial projects — power and instrumentation cable, cable tray and ladder, glands and accessories, junction boxes, low-voltage motors, drives and earthing materials — to IEC and BS standards. Explosion-proof equipment for hazardous areas has its own page.
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Product families
Sourced through the qualified supplier base. Listing does not indicate stock held by CRS PLUS — availability, origin and lead time are confirmed per enquiry, and every quotation states the certification that governs the supply.
Power cable
- —LV 0.6/1 kV XLPE/PVC/SWA/PVC to IEC 60502-1 and BS 5467
- —MV 3.3 to 33 kV XLPE to IEC 60502-2 and BS 6622
- —Copper and aluminium conductors, single and multi-core
- —Armoured and unarmoured; direct-burial and cable-tray grades
Specified by voltage grade, conductor size and material, insulation, armour and sheath.
Instrumentation and control cable
- —Individually and overall screened pairs and triples to BS EN 50288 / IEC 60092
- —Armoured and unarmoured
- —Thermocouple extension and compensating cable to IEC 60584-3
- —Fieldbus and data cable
For 4–20 mA, RTD, thermocouple and digital signal transmission.
Fire-resistant and LSZH cable
- —Fire-resistant cable to IEC 60331 and BS 6387 CWZ
- —Low-smoke zero-halogen sheathing to IEC 60754 / 61034
- —Flame-retardant to IEC 60332-1 and 60332-3
For emergency circuits, fire and gas systems and enclosed spaces.
Cable management
- —Cable tray, ladder and trunking — hot-dip galvanised, stainless and GRP
- —Perforated, solid-bottom and wire-mesh tray to IEC 61537 / NEMA VE 1
- —Bends, tees, risers, covers and support systems
- —Cable cleats, ties and marking
Sized to cable fill and span; finish selected for the environment.
Glands, junction boxes and enclosures
- —Brass and stainless cable glands, BW and CW types, to IEC 62444 / BS 6121
- —Junction boxes and enclosures in GRP, stainless and aluminium, IP66 to IEC 60529
- —Terminals, rails and accessories
- —Marshalling and distribution boxes
Explosion-proof versions are covered on the explosion-proof equipment page.
Motors, drives and earthing
- —Low-voltage induction motors to IEC 60034, IE2 and IE3, frames 63 to 450
- —Variable frequency drives, soft starters and motor control centres
- —Earthing: copper tape and rod, exothermic welding, earth pits and bars
- —Lightning protection components
Motors specified by kW, poles, frame, voltage, duty and enclosure.
How cable and electrical equipment is specified
Cable is defined by a construction code on the datasheet. The parameters below are what the code contains and what an enquiry should state.
| Parameter | What it defines | Common values |
|---|---|---|
| Voltage grade | Rated voltage phase-to-earth / phase-to-phase | 0.6/1 kV LV; 3.8/6.6, 6.35/11, 19/33 kV MV |
| Conductor | Material, size and class | Cu or Al; 1.5 to 630 mm²; class 2 stranded |
| Cores | Number of conductors | 1, 2, 3, 4, 5; multi-pair for instrumentation |
| Insulation | Conductor insulation material | XLPE (90 °C), PVC (70 °C), EPR |
| Armour | Mechanical protection | SWA steel wire (multi-core); AWA aluminium wire (single-core); STA steel tape |
| Sheath | Outer covering | PVC, LSZH, PE for direct burial |
| Standard | Construction and test standard | IEC 60502-1/-2; BS 5467, 6724, 6622; BS EN 50288 |
| Ingress protection | Enclosure rating | IP54, IP65, IP66 to IEC 60529 |
| Motor rating | Output, speed, frame and efficiency | kW, poles, IEC frame size, IE2/IE3, IP55, insulation class F |
SWA vs AWA vs unarmoured — which cable construction
Armour selection is the most common specification question on a cable enquiry.
| Property | SWA (steel wire) | AWA (aluminium wire) | Unarmoured |
|---|---|---|---|
| Use | Multi-core power cable | Single-core power cable | Indoor, in conduit or tray, protected routes |
| Why | Mechanical protection and earth path | Non-magnetic — avoids eddy heating in single-core | No mechanical protection needed |
| Direct burial | Yes | Yes | No — requires duct or conduit |
| Gland type | CW gland | CW gland | BW or A2 gland |
| Standard | BS 5467 / IEC 60502 | BS 5467 / IEC 60502 | BS 6004 / IEC 60227 |
Type tests and certificates supplied
No manufacturer-specific figures are published here: CRS PLUS sources from several mills and manufacturers and each issues its own certificate, which governs. These are the tests and certificates a cable and electrical delivery will normally include.
| Document or test | Standard or method |
|---|---|
| Conductor resistance | IEC 60228 |
| Insulation resistance and high-voltage withstand | IEC 60502 routine tests |
| Flame propagation | IEC 60332-1 (single cable), 60332-3 (bunched) |
| Smoke density and halogen content | IEC 61034, IEC 60754 for LSZH |
| Fire resistance | IEC 60331 / BS 6387 where specified |
| Type test certificate | From an accredited laboratory, per construction |
| Routine test certificate | Per drum, with drum number and length |
| Motor routine test | IEC 60034-1: no-load, locked rotor, HV, insulation resistance |
| Enclosure IP test certificate | IEC 60529 |
| Material certificate for tray and glands | Galvanising thickness to ISO 1461; material grade |
Supply terms
- Origin
- Sourced per enquiry from a qualified supplier base of mills and manufacturers in China, India, Europe and the Gulf. Origin and certifying body are stated on each quotation.
- Incoterms
- Ex-works and FOB as standard. CIF, CFR and DAP available to GCC, Levant, Red Sea, East and West African destinations.
- Documentation
- Mill test certificate to EN 10204 3.1 as standard, 3.2 with third-party witness on request; commercial invoice, packing list, bill of lading, certificate of origin.
- Inspection
- Third-party inspection at source available on request through recognised inspection agencies. Inspection scope agreed on the purchase order.
- Lead time
- Standard sizes and grades from stock to six weeks. Made-to-order items and large parcels eight to sixteen weeks. Confirmed per quotation.
- Enquiry detail
- For cable: voltage grade, conductor size and material, number of cores, insulation, armour, sheath, standard and length. For tray: width, type, finish and length. For motors: kW, poles, voltage, frame, IE class and enclosure. Drawing or MTO line references cover all of this.
Questions
Frequently asked questions
What is the difference between XLPE and PVC insulation?
XLPE, cross-linked polyethylene, has a continuous conductor operating temperature of 90 °C against 70 °C for PVC, so an XLPE cable of the same size carries more current. XLPE also has better dielectric properties and moisture resistance. PVC remains common for small-size internal wiring; XLPE is the standard for LV power distribution and all MV cable.
What does LSZH mean and when is it required?
Low-smoke zero-halogen sheathing produces little smoke and no corrosive halogen acid gas when burning, which protects people and equipment in enclosed spaces. It is specified for control rooms, offshore accommodation, tunnels, substations and anywhere evacuation or equipment survival in a fire matters. Tested to IEC 61034 for smoke and IEC 60754 for halogen content.
Why is single-core cable armoured with aluminium rather than steel?
A single-core AC cable carries an alternating magnetic field. Steel armour is magnetic and would heat through eddy currents and hysteresis, derating the cable. Aluminium is non-magnetic, so single-core cable uses aluminium wire armour. Multi-core cable has balanced fields and uses steel wire armour, which is stronger and cheaper.
What is the difference between IE2 and IE3 motors?
IE classes in IEC 60034-30 define minimum motor efficiency. IE3 premium efficiency is one class above IE2 high efficiency and is mandated for new motors in many jurisdictions. An IE3 motor costs more and runs cooler with lower losses; over a motor’s life the energy saving normally exceeds the price difference. Specify IE3 unless the project or the drive arrangement states otherwise.
When is cable ladder used rather than tray?
Ladder — two side rails with rungs — supports heavier cable runs over longer spans, ventilates well and is the norm for main power routes outdoors and in plants. Perforated tray supports lighter and smaller cables, gives more continuous support and is used for instrumentation and branch circuits. Both are selected on cable weight, span and environment, with hot-dip galvanised finish for outdoor and stainless or GRP for corrosive areas.
What is needed to quote a cable?
The construction — voltage grade, conductor size, number of cores, insulation, armour and sheath — the applicable standard, the length required, drum size preferences and any fire-performance requirement. A cable schedule line or the cable code from the project cable specification is sufficient.
Where is the material sourced from?
CRS PLUS sources cable and electrical equipment from its qualified supplier base of certified manufacturers in China, India, Europe and the Gulf. Origin and the type-test laboratory are stated on each quotation. CRS PLUS does not name manufacturers on this page and holds no distribution or agency agreement with any of them.
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