Oil & Gas
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.
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.
Specified by voltage grade, conductor size and material, insulation, armour and sheath.
For 4–20 mA, RTD, thermocouple and digital signal transmission.
For emergency circuits, fire and gas systems and enclosed spaces.
Sized to cable fill and span; finish selected for the environment.
Explosion-proof versions are covered on the explosion-proof equipment page.
Motors specified by kW, poles, frame, voltage, duty and enclosure.
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 |
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 |
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 |
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.
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.
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.
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.
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.
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.
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.
A structured offer follows within 72 hours.