STERLING/STERLING XL ALUMINIUM

Sterling and Sterling XL are multicompartment aluminium cable management systems from Marshall-Tufflex. Manufactured from high precision extruded aluminium. Each compartment has its own cover and fittings for safe and easy access of each compartment. A full range of bonding straps and connectors are available.

POSITIONING

When used in a skirting application the lower web should be drilled with a clearance hole to enable cables to pass through to the accessory boxes in the centre compartment before installation. The base unit should be mounted (5mm + floor covering) above the floor slab to enable cover and fitting to be installed.

INSTALLATION

Secure the trunking base every 750mm with no.8 round head screws, utilising the grooves in the outer compartment of the base to facilitate the drilling of 6mm clearance holes. Use a fine tooth blade (32/36tpi) or preferably acircular saw with a 350mm diameter fine tungsten tipped blade (96/108tpi) for cutting the aluminium trunking. This will produce an edge requiring minimal deburring.

JOINTS

Consecutive lengths of base are butt jointed together and at corners the trunking base MUST be mitred to ensure total enclosure of the trunking (if no internal segregator is fitted). This is not critical as the fittings cover the joint and overlap the trunking covers to a maximum of 10mm and cover any inaccuracies.

XL EXTERNAL BENDS

The base should be cut square at the corner and an internal segregator inserted into the web. This gives additional security to the clip-on bend.

click to enlarge

SINGLE LENGTHS

Where it is required to fit a single length of trunking between two inside walls (under 3 metres) it is advisable to place an additional coupler set in the centre of the trunking run to facilitate the removal of the covers.

ACCESSORY BOXES

These are installed by clipping the box into the centre compartment in place of the LTL1 cover. When being fed from the adjacent compartment drill a suitable size hole in the web and box if no suitable knock out is available. Install a bush or grommet to protect the cable when passing through the aluminium web.

click to enlarge

COVER REMOVAL

The covers have been designed to remain captive irrespective of impact during normal conditions and minor undulations to the base and to limit unauthorised removal. To remove the covers first detach a coupler, internal or external bend to gain access, care being taken to avoid any damage to the cover surface finish. The angle and square cover are eased from the base by inserting a small screwdriver between the base and the cover clip then lever out. All covers are then gently eased off the base taking care to avoid any damage.

click to enlarge

BUSBAR ASSEMBLY

Busbar Assembly (GRA1) 63 Amp distribution system comes complete for installation directly into the above trunking systems. For Busbar fittings and accessories please refer to relevant sections.

STERLING

click to enlarge

STERLING XL

Requires Busbar Support (ELBS200) to position Busbar Assembly within the trunking base.

click to enlarge

EARTHING.

Covers, base and metallic fittings are to be cleaned of protective coating and earth bonded. Incoming earth connectors are made using the LBT1 bonding assembly installed in the earth channel of the base. For circuits protected by a device greater than 32A, the connector LBT2 is required to bond two lengths of base together. In final ring or radial 32A circuits the bonding strap LBS1 may be used in the earth channel for bonding lengths of trunking. Covers and metallic fittings should be bonded using the bonding strap LBS2 onto the earth upstand.

click to enlarge

Bonding Terminal (LBT1)

Terminating the incoming earth to the trunking base. Cable capacity 16mm2 .

Bonding Connector (LBT2)

Base earth continuity link for 63A Busbar.

Bonding Strap (LBS1) 4.0mm2

Base earth continuity strap for 32A system.

Bonding Strap (LBS2) 1.5mm2

Base to cover/end cap earth continuity link.

DIMENSIONAL REFERENCE TO HORIZONTAL OFFSETS AND FABRICATED FITTINGS

See Sterling PVC-U Trunking.

The installation should be in accordance with the latest edition of BS7671 (1992) Wiring Regulations.