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BS8436 Cable


Multicore electric cables with a voltage rating of 300/500V and low emissions of smoke and corrosive gases when subjected to fire. Manufactured in accordance with British Standard BS8436 for use in building voids, partitions and walls.

British Standard BS8436 specifies requirements for 2-core, 3-core and 4-core cables with an uninsulated full-size circuit protective conductor of tinned annealed copper and metallic screening.

Designed for use in building voids, partitions and walls, cable manufactured to this standard have a protective metallic or laminated metallic screen for electrical and mechanical protection to meet the 17th Edition of the Wiring Regulations BS 7671:2008 (2011) for concealed cables at a depth of less than 50mm, Regulations 522.6.100 to 522.6.103. Designed to be electrically fail-safe in the event they are penetrated by a nail or screw, cables manufactured in accordance with BS8436 must pass a nail penetration test six times and maintain functionality on each of these occasions. 

The thermostatic voltage rating of cables manufactured in accordance with BS8436 is 300/500V. 

BS8663 Cable Supplier

BS8436 cable construction

Insulated conductor Plain or tinned annealed copper (Class 1, 2 or 5)
Uninsulated circuit protective conductor Tinned annealed copper of the same class as the insulated conductor
Insulation EI5, GP4, GP6 or GP8
Screen One or more metallic or laminated metallic tape(s)
Outersheath Type LTS 3 (conforming to BS7655-6.1

This standard requires the protective metallic or laminated metallic tape screen to be applied longitudinally or helically (or as a combination of the two), placing the metallic side of the tape in direct contact with the uninsulated circuit protective conductor. It also requires the sheathing to have low smoke zero halogen properties, curbing the smoke emissions when subjected to fire and eliminating halogens such as chlorine gas which can be produced through the burning of the materials. This reduced the risk to life and essential equipment, including fire detection and fire alarm systems, in the event of fire.

BS8436 Core colour coding

2-core + uninsulated circuit protective conductor Brown, Blue or brown, brown
3-core + uninsulated circuit protective conductor Brown, black, grey
4-core + uninsulated circuit protective conductor Blue, brown, black, grey

Eland Cables' portfolio of cables manufactured in accordance with BS8436 include UK-manufactured Protec® cables.
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About Eland Cables

About Eland Cables

Established in 1975, Eland Cables is a supplier of power, data, instrumentation and control cables and cable accessories to the world's most demanding industries and to some of its most prestigious projects. Our reputation is built on an unswerving focus on quality, technical expertise and customer service.


Our focus on quality has resulted in our in-house specialist cable testing facility securing the ISO 17025 accreditation. This certifies the competence, impartiality and performance capability of our laboratory and its evaluations. In turn, it means peace of mind for our customers with regard to the quality of the cables they source from us.

Expert tecHnical support

Our highly-qualified technical team is on hand to provide technical support with all aspects of cable selection, technical specification, regulatory requirements, and bespoke cable design and manufacture.

Complete Cable Solutions

We are a key contributor to projects in over 100 countries every year, adding value through comprehensive technical support, reliable logistics, innovative solutions, and a customer-centric approach.


The Cable Lab®

UKAS-accredited specialist cable testing laboratory

About Eland Cables

The Cable Lab® our in-house cable testing facility, is UKAS-accredited to ISO 17025, which is the single most important standard for calibration and testing laboratories around the world. Accreditation to this international standard demonstrates our laboratory's technical competence and the accuracy of its results.

For our customers, it means peace of mind. They can have full confidence in the quality of our products and can demonstrate due diligence in selecting their cable supplier.

Our customers can also rely on the Cable Lab's services for an independent, objective and comprehensive quality assessment of cables procured from third parties.