Power Cables for Industrial Plants: Choosing the Right Cable for Each Application

Industrial plants rely on specialized industrial power cables for distribution, motors, variable-speed drives, automation and essential services. Each circuit has its own electrical duty, route and operating environment. Choosing the right cable means matching its construction to those conditions, rather than applying one general-purpose cable across the entire facility. GENGU CABLE manufactures power, VFD and control cables for industrial applications, with constructions selected around the needs of each circuit

Industrial Plant Cable Selection at a Glance

Application	What the cable must do	Key factors	GENGU CABLE solution
Main distribution	Carry power between supply equipment, switchboards and local panels	Load, route length, heat dissipation, voltage drop and fault duty	PVC- and XLPE-insulated power cables
Equipment feeders	Supply machinery and process loads	Starting duty, route conditions and mechanical exposure	Power cables with suitable insulation, sheath and protection
VFD-to-motor circuits	Connect a variable frequency drive to a motor	Drive guidance, cable length, EMC, grounding and termination	VFD power cables with screened options
Control and automation	Carry control, monitoring and measurement signals	Core count, signal integrity, routing and electrical noise	PVC/XLPE control cables with screened options
Essential circuits	Serve systems with defined fire-performance requirements	Circuit function, installation route and project requirements	Fire-resistant or LSZH cable options where specified
Plant extensions	Supply remote equipment and outdoor areas	Route layout, weather, access and mechanical loading	Underground power cables, armored constructions where required, and aerial bundled cables for suitable overhead routes

Main Distribution and Equipment Feeders

Distribution cables connect transformers, switchboards, local panels and fixed equipment. Load is only the starting point. A suitable cable must also operate safely in its installed condition.

The following factors should be considered together:

• Continuous load and anticipated expansion
• Circuit length and permissible voltage drop
• Available fault current and protection coordination
• Ambient temperature and restricted ventilation
• Grouped circuits on trays or in enclosed routes
• Installation method: tray, conduit, trench, direct burial or outdoor route
• Exposure to moisture, oil, UV, chemicals, abrasion or impact

A cable installed in open air may carry heat differently from the same cable enclosed in a duct or grouped with other loaded circuits. Current capacity should therefore be checked against the actual route, not only against the connected load.

GENGU CABLE supplies PVC- and XLPE-insulated power cables for industrial distribution. The range includes screened, flame-retardant and armored constructions for applications that require those features.

Motors and Variable-Speed Drives

Motor feeders should be separated into two groups: conventional fixed-speed motors and VFD-driven motors. Their cable requirements are related, but not identical.

Fixed-Speed Motor Feeders

For a fixed-speed motor, selection usually depends on motor load, starting conditions, cable length, installation method and site exposure.

Mechanical protection may be appropriate where the route presents a clear risk of crushing, impact or damage during installation. Armoring should not be specified automatically: it improves resistance to physical damage but adds weight, reduces flexibility and affects bending and installation requirements.

VFD-to-Motor Cables

VFDs are widely used on pumps, fans, conveyors, compressors and process machinery. Their switching output can create high-frequency electrical effects and electromagnetic noise in the cable between the drive and motor.

Factor	Why it matters
Drive documentation	May define cable type, maximum route length and required motor protection
Cable insulation	Must suit the electrical stresses associated with inverter output
Cable length	Can affect conditions at the motor terminals
Screening	Can help manage electrical noise where EMC conditions require it
Grounding and bonding	Provides a controlled path for high-frequency currents
Screen termination	Determines whether screening remains effective along the full route

Shielded cable is not a universal requirement for every VFD installation, but it is often required or strongly recommended by drive manufacturers for EMC compliance and bearing-current protection. The decision should always start with the drive manufacturer’s documented guidance, and then consider the surrounding EMC environment, cable length, grounding design, and the presence of sensitive circuits nearby. When screening is omitted, confirm in writing that the drive manufacturer permits this configuration. Where screening is specified, it must be correctly bonded and terminated at the drive and motor ends.

GENGU CABLE supplies VFD power cables for frequency-controlled motor systems, including pumps, fans, conveyors and central air-conditioning motors. Available constructions include XLPE insulation, screened, flame-retardant, LSZH and armored options for project-specific requirements.

Control and Automation Circuits

Control cables connect PLCs, instruments, sensors, valves, interlocks and switchgear. Their priority is reliable signal transmission, not bulk-power capacity.

A control cable should be selected around the signal type, number of cores, route and interference environment. In electrically noisy areas, the installation layout matters as much as cable construction. Keeping sensitive control circuits physically separated from VFD output cables and high-power feeders is one of the most effective ways to reduce interference—often more effective than screening alone. Where separation is limited, screening, grounding, and routing should be considered together.

Where physical separation is limited, the cable screen, grounding arrangement and routing should be considered as one system. GENGU CABLE supplies PVC- and XLPE-insulated control cables for industrial control, measurement and signaling, with braided-screened, copper-tape-screened, armored, flame-retardant and LSZH options.

Fire Performance Where It Matters

The term “fire-safe cable” is not a defined technical classification. Different fire-related requirements—flame retardancy, fire resistance, and low-smoke zero-halogen performance—address different conditions and should be specified separately. Flame retardancy, fire resistance and low-smoke zero-halogen performance address different conditions and should not be used interchangeably.

Required performance	What it addresses	Typical application
Flame retardancy	Limits flame propagation under specified test conditions	Grouped cables, trays and routes where fire spread is a concern
Fire resistance	Supports circuit operation for a stated period during fire exposure	Emergency lighting, alarm, smoke-control or shutdown circuits where required
Low-smoke, zero-halogen performance	Reduces smoke and corrosive halogen gases during combustion	Enclosed, occupied or equipment-sensitive areas

LSZH relates to smoke and halogen emissions during combustion. It does not indicate whether a circuit will continue to operate during a fire—that is a separate fire-resistance requirement. Flame-retardant cable can limit flame spread without maintaining circuit function. The required performance should be defined by the circuit function, project documentation and applicable local regulations.

GENGU CABLE’s range includes fire-resistant LSZH cables for fixed wiring, together with LSZH constructions in selected power, VFD and control cable ranges.

Outdoor Distribution and Plant Expansion

Remote pumps, storage yards, water-treatment equipment, auxiliary buildings and plant extensions may require power beyond the main production area. The route determines whether underground or overhead distribution is more practical.

Underground cable may suit routes where physical protection and clear site access are needed. Overhead arrangements may be appropriate where route layout, maintenance access and local requirements support them.

For outdoor routes, review:

• Soil, water exposure and jointing requirements for buried cable
• Span loading, supports, clearances and corrosion conditions for overhead lines
• Weather exposure, insulation needs and maintenance access
• Future expansion of the site or connected load

For suitable overhead distribution routes, GENGU CABLE supplies aerial bundled cables and bare conductors, including AAC, AAAC, ACSR and AACSR. Bare-conductor systems are generally considered for utility-style overhead networks, large industrial sites or project-specific distribution arrangements.

Selecting a Cable for Your Project

A complete cable schedule is helpful, but it is not required before a technical discussion can begin. The circuit function, route and operating environment provide the essential starting point.

Available project detail	Why it is useful
Equipment or circuit function	Identifies distribution, motor, VFD, control or essential-service duty
Installation route	Establishes indoor, outdoor, tray, conduit, trench, burial or overhead conditions
Approximate route length	Supports electrical and installation planning
Operating environment	Identifies water, UV, oil, heat, chemical or mechanical exposure
Project requirements	Defines testing, documentation and compliance expectations
Quantity and delivery schedule	Supports cable lengths, drum planning and production scheduling

GENGU CABLE can review the available project information and recommend a cable construction suited to the application. Drawings, cable schedules and technical specifications can be added as the project develops.

Discuss Your Industrial Cable Requirement with GENGU CABLE >>

Share your application, installation route and available project information. Our team can help identify an appropriate cable construction and prepare a project-specific quotation.

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