Page 112 - SMM2 eBOOK

R.12 Trays and fittings

1. Trays shall be given in metres stating the type and width and the method of jointing.

2. Stools shall be enUmerated stating the type and size

3. Fittings shall each be described and enumerated as extra over the trays in which they
occur. Cutting and jointing trays to fittings shall be deemed to be included.

R.13 Trunking and tray supports

Trunking and tray supports shall be deemed to be included with the items.

Cables

R.14 Generally

1. Determining circuits and providing draw-wires, draw-cables and the like shall be deemed
to be included.

2. Cables required to be colour coded or otherwise marked for identification shall be so
described.

R.15 Cables

1. Except for final sub-circuits, cables in conduits or trunking and cables fixed to trays shall
be measured as the net length of the conduit, trunking or tray. Other cables shall be
measured as fixed (but without any allowance for sag) between boxes, equipment, control
gear, fittings, accessories and the like. Allowances for cable entering fittings, accessories,
equipment and control gear shall be deemed to be included with the items.

2. Cables shall be given in metres stating the type and the size. Classification shall be as
follows:

a. Drawn into conduits or ducts
b. Laid or drawn into trunking.
c. Laid or drawn into trunking and laced into circuit groups.
d. Fixed to surfaces.
e. Wrapped around pipework.
f. Laid in trenches
g. Fixed to insulators in overhead lines.
h. Suspended from catenary cables.

3. Cables drawn into existing conduits, existing ducts or existing trunking shall each be
described. Removing and replacing existing covers, existing inspection lids and the like
shall be deemed to be included.

4. Cable-joints shall be enumerated stating the type and size of cable. Joint-boxes, sealing-
boxes and the like shall be given in the description stating the type. Materials and heat for
making the joint shall be deemed to be included.

5. Line-taps shall be enumerated stating the size and type of the cable. Shrouds shall be
given in the description stating the type.

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