Ellis Patents

Ellis Patents Cable Cleats

Thorne & Derrick | Distributed from Stock | Approved Supplier | UK & Export Sales

Ellis Cable Cleats

Ellis Patents based in the UK are world leading manufacturers of cable cleats and cable clamps used to clamp and support LV-MV-HV cables – this includes cable support and management products to provide short circuit protection for 600V, 11kV-33kV-66kV and medium/high voltage power cables in single, trefoil or bundled formation up to 400kV.

Cable cleats or cable clamps manufactured from nylon, aluminium or stainless steel are installed to retain cables in the event of a short circuit – custom designed and engineered single and trefoil cable cleats are available.

Cable hangers support single or multiple cables – hangers and cable hooks are available in both galvanised steel and nylon and are used to support horizontal cable routes to building and tunnel structures. A complete range of steel cable hooks are also available compliant with 18th Edition of the IET Wiring Regulations (BS7671) is effective as of January 1, 2019.

Ellis Patents cable cleats are available for all industry applications and are tested for toxicity, limited oxygen, fire resistance and low smoke zero halogen emissions.

Ellis brands of cable clamps include: Alpha, Emperor, Flexi-Cleat, Atlas, Colossus, Vari-cleat and Vulcan cable cleats.

Ellis Patents Cable Cleats

Ellis Patents Cable Cleats – supplied by T&D to clamp LV-HV power cables on medium/high voltage systems and support EHV transmission and distribution cable 132kV-400kV.


Cable Cleats & Clamps from Ellis Patents

Flat, Trefoil & Quadrafoil Cables

Cable arrangements for 3 phase installations utilising single conductor cables are typically flat spaced, flat touching or trefoil.

In the UK the 17th Edition Wiring Regulations (BS7671) provides current ratings and voltage drop values for all these cable configurations – information is also available on grouping factors and spacing between circuits to achieve thermal independence.

Trefoil Cleats

Power systems with increased anticipated short circuit levels also expose installed cables to elevated temperatures (conductors can reach up to 250°C) – the high temperature leads to a softening of the cable insulation and outer cable sheath jacket exposing the cable to potential damage by the cleat. To counteract this cable cleats or cleats used with intermediate Flexi Straps are available with polymeric liners.

Cable Expansion & Single Core Cables

Single core cables, operating at low, medium or high voltage, expand and contract under thermal cycling at higher levels than multicore cables – if the cable is constrained considerable forces can be transferred to the supporting structure. To allow for this, single core cables are generally “snaked” allowing slight loops to accept the cable expansion and contractor. It is also usual to allow some of the cable cleats to move freely and not restrain all cable cleats.

Cleating Trefoil & Triplex Cables

The cable liner surrounds are used to protect medium/high voltage power cables typically supplying electricity at 11kV – the cable cleat liners are surrounded as standard in a LSF Zero Halogen polymeric materials. The trefoil or Triplex surrounds are used with single cable cleats to secure Triplex cables (three single core cables spirally twisted together), overcoming the twist in the cable to be cleated at any point along the installed length.

Without cable surrounds the installation of cable cleats would be difficult due to the relative position of the Triplex cable being subject to variation along the cable run – here the inner liner is applied around the Triplex cables and then a standard cable cleat has been used. Note either polymeric or stainless steel cable cleats can be used depending on the short circuit ratings of the cable system.

Short Circuit Protection Using Cable Cleats Manufactured by Ellis Patents

Specialist application cable cleats are available from stock for high performance cable applications including fire resistant, low smoke zero halogen/LSF, flame retardant and with specific end-user UK DNO utility approvals for medium/high voltage power cable cleating applications such as Triplex cables. Also Network Rail and LUL London Underground approved cable cleats for clamping rail power, S&T cables at station, sub-surface and tunnel applications.

Cable Cleats

Cable Cleats – Ellis Patents Emperor cleats clamp all types of LV, MV & HV cables providing short circuit protection up to 235kA, typically specified to support MV-HV cables operating at 11kV/33kV


Ellis Patents manufacture the most extensive range of trefoil cable cleats for medium/high voltage power cable clamping in both stainless steel and aluminium, including Emperor Cable Cleats

Ellis Patents – Distributors, stockists & Suppliers

Thorne & Derrick provide competitive prices and fast delivery from stock for the complete range of Ellis Patents cable cleats.

View the complete range of Ellis Patents cable cleats  ➡

T&D - CABLE ♦ JOINT ♦ TERMINATE ♦ CONNECT ♦ GLAND ♦ CLEAT ♦ CRIMP ♦ DUCT ♦ SEAL ♦ REPAIR ♦ LV MV HV 11KV 33KV