TPS Cable Guide: Types, Sizes, Uses And Current Ratings Explained

A TPS cable is an electrical cable with insulated conductors protected by a thermoplastic outer sheath. It is commonly used for fixed wiring applications in residential, commercial and light industrial installations where reliable power distribution is required.

TPS cable selection depends on factors such as cable size, current requirements, installation method and operating conditions. Choosing the correct TPS electrical cable helps maintain safe performance and reduces the risk of overheating or electrical issues.

Key Takeaways

• TPS cable is a thermoplastic sheathed electrical cable commonly used for fixed wiring installations.
• Cable size selection depends on current requirements, installation conditions and electrical load.
• Flat TPS and circular TPS cables are designed for different installation needs.
• Current capacity varies depending on conductor size, environment and installation method.

What Does TPS Cable Mean?

TPS cable means Thermoplastic Sheathed cable. It is an electrical cable where the conductors are covered with insulation and protected by an outer thermoplastic sheath. The sheath provides protection against common environmental conditions while keeping the cable suitable for fixed electrical installations.

A typical TPS electrical cable may contain:

TPS cables are commonly used because they provide a practical balance between flexibility, protection and ease of installation.

• Active and neutral conductors
• Protective earth conductor (where required)
• Individual insulation around conductors
• Outer thermoplastic protective sheath

How Is TPS Electrical Cable Made?

TPS cable construction consists of multiple layers designed to safely carry electrical current while protecting the internal conductors. The main construction elements of a TPS cable are explained below.

Conductors Inside TPS Cable

The conductors are the metal wires that carry electrical current through the cable. They are commonly made from copper because copper provides good electrical conductivity and reliable performance. The number and size of conductors depend on the cable type and the intended application.

Insulation Around The Conductors

Each conductor is covered with an insulating layer to prevent unwanted electrical contact between wires. The insulation helps:

The insulation material is selected according to voltage requirements and operating conditions.

• Maintain electrical separation
• Improve safety
• Protect conductors during operation

Thermoplastic Outer Sheath

The outer thermoplastic sheath surrounds the internal conductors and provides mechanical and environmental protection. It helps protect the cable from:

The sheath also gives the cable its recognizable TPS construction.

• General wear
• External contact
• Installation conditions

Protective Earth Conductor

Some TPS cables include an earth conductor that provides a safety path for fault currents. This helps electrical protection systems operate correctly during faults.

Different Types Of TPS Cable

TPS cables are available in different designs depending on how they are installed and the electrical requirements of the system.

Flat TPS Cable

Flat TPS cable has conductors arranged in a flat profile, making it suitable for installations where space saving and easy routing are important. It is commonly used in fixed wiring applications where the cable needs to fit neatly into confined areas.

Circular TPS Cable

Circular TPS cable has conductors arranged inside a round outer sheath. This design provides a more traditional cable structure and can be useful where a circular profile is preferred for installation or protection requirements.

Twin TPS Cable

Twin TPS cable contains two insulated conductors usually used for electrical circuits where only active and neutral connections are required.

It is commonly used in applications where a separate earth conductor is not included within the same cable structure and additional earthing arrangements are provided separately when required. The suitability of twin TPS cable depends on the electrical load, installation method and overall wiring requirements.

Twin And Earth TPS Cable

Twin and earth TPS cable includes:

The additional earth conductor provides a protective path for electrical faults making this cable type commonly used in many fixed wiring installations.

Twin and earth TPS cable is often selected for applications where both power supply and protective earthing are required within the same cable.

• Active conductor
• Neutral conductor
• Earth conductor

Choosing The Right TPS Cable Size

Selecting the correct TPS cable size is important because the conductor must safely carry the required electrical current without overheating. Cable size is measured by the cross-sectional area of the conductor, usually in square millimetres (mm²). Understanding electrical cable size helps users select suitable conductors for different applications.

A larger conductor size can generally carry more current but the final choice depends on the complete installation conditions.

Common TPS electrical cable sizes include:

The correct size depends on factors such as:

• 1.5mm²
• 2.5mm²
• 4mm²
• 6mm²
• Larger sizes for higher current applications
• Electrical load
• Current requirement
• Cable length
• Installation method
• Voltage drop
• Operating environment

Common TPS Cable Sizes Explained

Different TPS cable sizes are used for different electrical requirements.

1.5mm TPS Cable

A 1.5mm TPS cable is commonly used for lower current circuits where a smaller conductor size is suitable. The exact current capacity depends on installation conditions, cable arrangement and applicable electrical requirements.

2.5mm TPS Cable

A 2.5mm TPS cable is commonly used for circuits requiring higher current capacity than smaller cable sizes. The actual current rating depends on factors such as:

A fixed amp rating does not apply to every installation.

• Installation method
• Ambient temperature
• Cable grouping
• Electrical standards

Larger TPS Cable Sizes

Larger TPS cable sizes are used where electrical systems require greater current capacity. The selection depends on the equipment load, distance of the cable run and the conditions where the cable is installed.

TPS Cable Size And Current Capacity

The current carrying capacity of a TPS cable refers to the maximum amount of electrical current the conductor can safely handle under specific conditions. Cable size is one of the main factors affecting current capacity but it is not the only consideration.

The current rating can change depending on:

For example a 2.5mm TPS cable installed in open conditions may perform differently from the same cable installed in a restricted or grouped arrangement. This is why cable selection should consider the complete installation rather than relying only on cable size.

• Conductor size
• Cable installation method
• Surrounding temperature
• Number of grouped cables
• Ventilation conditions

What Is TPS Cable Used For?

TPS cable is commonly used for fixed electrical wiring applications while other cable types are selected for different electrical cable applications depending on power requirements.

Residential Wiring

TPS cable is widely used in residential electrical installations for circuits that supply power to lighting, sockets and other household electrical equipment.

Commercial Installations

Commercial buildings may use TPS electrical cable for various fixed wiring applications where reliable power distribution is required.

Light Industrial Applications

Some light industrial systems use TPS cables where suitable cable protection and current capacity are required for electrical equipment.

TPS Cable vs TPI Cable: What Is The Difference?

TPS and TPI cables are both electrical cable types but they differ in construction and application.

The main difference is the cable construction and intended use. The correct choice depends on the electrical requirements and installation conditions.

Flat TPS Cable vs Circular TPS Cable

Flat and circular TPS cables are both used for electrical wiring applications but their construction and installation characteristics are different.

Flat TPS Cable

Flat TPS cable has a low-profile design where conductors are arranged in a flat formation similar to other flat cable design approaches used for space-saving installations. This shape can make it easier to route the cable through limited spaces and maintain a neat installation. It is commonly used where:

• Space saving installation is important
• Cable routing needs to be simple
• A low profile cable design is preferred

Circular TPS Cable

Circular TPS cable has conductors arranged inside a round outer sheath. This traditional cable design provides a uniform structure and can be suitable where a circular cable shape is preferred. It may be used where:

• A round cable profile is required
• Additional mechanical protection is needed
• Cable routing conditions suit a circular design

Factors To Check Before Installing TPS Cable

Choosing the correct TPS cable requires more than selecting a cable size. The installation environment and electrical requirements also affect cable suitability. Important factors include:

Determine The Electrical Load

The cable should be selected based on the amount of current required by the connected equipment. Higher electrical loads generally require larger conductors.

Check Cable Length

Longer cable runs can increase resistance and voltage drop which may require a larger conductor size to maintain suitable performance.

Consider Installation Conditions

The way a cable is installed can affect its current carrying capacity. Factors such as cable grouping, temperature, conduit installation and available ventilation should be considered.

Verify Cable Requirements

Before installation, check that the selected TPS electrical cable meets the required specifications for the application including conductor size, insulation type and protection requirements.

Common TPS Cable Selection Mistakes

Selecting an unsuitable cable can affect electrical safety and system performance. Some common mistakes include:

Choosing Cable Size Only Based On Appliance Type

Different equipment may have different electrical requirements so cable selection should be based on actual load current rather than appliance type alone.

Ignoring Installation Conditions

The same cable size may have different performance depending on whether it is installed in open areas, conduit, grouped with other cables or exposed to higher temperatures.

Using A General Cable Rating

Cable ratings provide useful guidance but the final selection should consider the complete installation conditions and applicable electrical requirements.

Conclusion

TPS cable is a commonly used electrical cable designed for fixed wiring applications where conductors need insulation and external protection. Its thermoplastic sheath provides a practical solution for residential, commercial and light industrial installations.

Choosing the correct TPS electrical cable depends on factors such as conductor size, current requirements, cable length, installation conditions and voltage drop considerations.

Understanding the differences between flat TPS, circular TPS and different cable sizes helps users select a suitable cable for their electrical requirements while maintaining a safe and reliable installation.

FAQs

What does TPS cable mean?

TPS cable means Thermoplastic Sheathed cable. It is an electrical cable with insulated conductors protected by a thermoplastic outer sheath and is commonly used for fixed wiring applications.

How many amps is 2.5 mm TPS cable good for?

The current capacity of a 2.5mm TPS cable depends on factors such as installation method, temperature, cable grouping and electrical requirements. A single amp rating does not apply to every installation.

What is the current rating for 1.5 mm TPS conductors?

The current rating of 1.5mm TPS conductors depends on cable construction, installation conditions and applicable electrical standards. The conductor size alone does not determine the final current capacity.

What is the difference between TPI and TPS cable?

TPS cable uses a thermoplastic sheath around insulated conductors while TPI cable has a different construction and is used for different electrical applications. The correct choice depends on the required installation conditions and cable specifications.

Is flat TPS cable better than circular TPS cable?

Flat and circular TPS cables are designed for different installation needs. Flat TPS cable can be useful where space saving routing is important while circular TPS cable may be preferred where a round cable structure suits the installation.