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Powertrack - Raised Floor Boxes - BS EN - GRP Ladder - Wire Basket - Load Testing

Sterling Curve


Sterling Curve is available in PVC-U and Aluminium.

PVC-U trunking is flame retardant and self-extinguishing. Our PVC-U products are manufactured using recycled PVC-U material as well as virgin grade material and are 100% recyclable.

Aluminium trunking is manufactured from high precision extruded aluminium with a powder coat finish. Fittings for the Aluminium range are polycarbonate which is 100% recyclable.


BS 7671:2008

BS EN 50085-1:2005

BS EN 50085-2-2:2006

BS 4678-4:1982

Sterling Curve Profile 1 – no box

1 & 3 = 1170mm² total area

1 & 3 = 527mm² 45% space factor

2 = 3858mm² total area

2 = 1736mm² 45% space factor

With Box in Comp 2

2 = 1376mm² total area

2 = 619mm² 45% total area

Sterling Curve Profile 2 – no box

1 = 1170mm² total area

1 = 527mm² 45% space factor

2 = 3858mm² total area

2 = 1736mm² 45% space factor

3 = 1542mm² total area

3 = 694mm² 45% space factor

With Box in Comp 2

2 = 1376mm² total area

2 = 619mm² 45% total area

Cable Capacities

All calculations allow for a 45% space factor


Powertrack is an underfloor busbar system rated at 63Amp maximum available in Standard or CE (Clean Earth) versions.


Powertrack is designed and independently tested to BS EN 61534 and complies with the current version of the BS 7671 Wiring Regulations.


Powertrack lengths of 1.2m, 1.8m, 2.4m and 3.6m with tap-off outlets at 300mm.

Raised Floor Boxes

Raised floor boxes are third party tested to comply with:

BS EN 61534-22:2009
BS EN 60670-1:2005
BS EN 60670-23:2008
BS EN 50085-1:2005
BS EN 50085-2-2:2008

Load Testing

Load testing of floor boxes to:
BS EN 61534-22:2009
BS EN 50085-2-2:2008


  • Lid/trim: flame retardant polypropylene 30% glass reinforced grey RAL 7011
  • Box assembly: galvanised steel
  • Load plate: 3mm zinc plated steel
  • Accessory plate: galvanised steel

Firefly Fire Clips


Compliant with the general principles of BS 5839-1:2013 Section 26.2d when independently tested.


Vertical spacing – Use 400mm spacing.

Horizontal spacing – Use 600mm spacing, except over doors and other openings which should be 300mm spacing.

A qualified electrician must select the correct screw fixing for the substrate to comply with the current version of BS 7671. These must be used with the correct drill size.

MT Supertube

MT Supertube provides LS0H polyethylene-coated aluminium cable protection for installation where halogen free products are a requirement.


Conduit: A seamless aluminium tube sandwiched between two layers of extruded LS0H polyethylene.

Fittings: LS0H polycarbonate or cast metal with paint finish. (Black or white).

Shielding effectiveness

Shielding effectiveness (attenuation in dB) measures the ratio between the external environment field strength and the field strength after passing through any material. This is recorded in a logarithmic scale.

The graph shows that the shielding effectiveness of MT Supertube is highly effective throughout the entire frequency range and will provide protection from interference for data, telecoms and signal cables.

Click the PDF image to view the technical information in full

Cable Management Cable Management

Request Marshall-Tufflex Info

Marshall-Tufflex Ltd
Churchfields Industrial Estate
East Sussex
TN38 9PU

Email Marshall-Tufflex

Tel: 01424 856600
Fax: 01424 856611

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