The Marshall-Tufflex Steel Trunking Systems are suitable for the installation of most types of accessories with M3.5 x 60.3mm or M3.5 x 120.6mm fixing centres using a standard steel flush accessory box with an internal depth of 35mm.

INSTALLATION

BASE: When used as a skirting system sufficient clearance should be allowed for between the floor covering and the skirting base (2mm + floor covering). Secure the trunking base every 750mm with No. 8 screws by drilling the back of the trunking base. To cut the trunking use a fine tooth saw and jig. Trunking base and fittings are joined by use of coupling sets. The coupling sleeve B should be put halfway into the already installed trunking base. The next section of trunking base can be slid onto the sleeve and fixed into position. The serrated edged coupler plate is then pushed firmly into the bottom of the trunking base so that it covers the lower joint A, making a good bond between consecutive lengths of trunking. Finally the connecting sleeve must be pushed into position B. Fixing screws, cut edges etc. should be finished in such a way that no sharp edge can damage the cables inside the trunking.

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DIVIDING FILLET: This is manufactured from pre-galvanised steel and is cut to the required length.

COVERS: The covers are provided with pressed outside grippers which automatically establishes an earth contact when they are pushed into the trunking base. The length of the covers must be determined so that the ends are covered by a fitting or accessory. Every cover has to have at least one pair of side grippers to ensure earth continuity. The length of a cut cover must be at least 5cm, with the side grippers in the middle. For external bends and flat angles the appropriate bend covers must be fitted.

ACCESSORY BOXES: Mounting boxes are available in single and double gang versions and are fixed to the centre rail by means of a swivel clamp. Boxes can be located at virtually any point on the length of the trunking with a minimum distance of 50mm between consecutive accessory boxes. A chosen position can be changed by simply slackening the fixing screws and sliding the box along the centre rail to a new position.

EARTHING

Each length of trunking and all major fittings and accessories are fitted with earth connections. The whole of the trunking system should be installed in accordance with the latest edition of BS7671 (1992) 16th edition of the IEE Wiring Regulations.

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	SYSTEM 130 A = 1680mm2 total area 45% SF = 756mm2. B = 1640mm2 total area 45% SF = 738mm2.		SYSTEM 180 A = 2963mm2 total area 45% SF = 1333mm2. B = 1640mm2 total area 45% SF = 738mm2. C = 2907mm2 total area 45% SF = 1308mm2.
	SYSTEM 170 A = 2907mm2 total area 45% SF = 1308mm2. B = 1640mm2 total area 45% SF = 738mm2.		SYSTEM 190 A = 2963mm2 total area 45% SF = 1333mm2. B = 1640mm2 total area A 45% SF = 738mm2.

DESKPOST TECHNICAL INFORMATION