No.7 Switchroom Supporting Design Documentation

Simon Storage - ISCo East

Instrument and Electrical Installation Specification

P & I Design Ltd

DOCUMENT NO: SI003001.INS

2 Reed Street, Thornaby, UK, TS17 7AF

ISSUE: A DATE: 17/02/09

Tel: 00 44 (0)1642 617444

PAGE 6 OF 14

Fax: 00 44 (0)1642 616447

3.5

Segregation of Service

All cable supports and cables shall be prevented from coming into contact with process

equipment and piping by a spacing of 150mm.

Cables operating at a voltage of 110V AC and above shall be segregated from cables

operating at a voltage of 24V DC and below.

Intrinsically safe circuits shall not share multicore cables with none intrinsically safe circuits.

3.6

Fixings

No structural steelwork shall be drilled for any purposes without the approval of the

Engineer. In general, all fixing to steelwork shall be by means of studs welded to the

steelwork or by clamp brackets or hook bolts. Permission shall be obtained from the

Engineer for any other type of fixing. Any protective coating damaged by welding, etc.

should be made good by a method approved by the Engineer.

The supply and fixing of all support brackets, clamps and spacers and any other steelwork,

whether or not shown in detail on the drawings or otherwise, which may be required for the

proper and effective fixing of any equipment shall be considered to be included in the

material and labour for the supply and fixing of that equipment, unless this work is

specifically detailed in the Schedules.

Where PVC sheathed cable is used, cable cleats and supports shall be as recommended by

the cable manufacturer. They shall be designed to avoid any damage to the PVC sheaths by

sharp edges and excess pressure.

Cables erected on walls or steelwork shall, so far as is practicable, be so supported that no

flexing can occur. Generally cables shall be supported on cleats which clamp the cables to

prevent longitudinal movement.

Lightweight equipment and conduit saddles may be fixed to the building structure by means

of screws in metal or plastic plugs. Wood or fibre plugs shall not be used.

Fixing to brickwork shall be made in the bricks and not in the joint. If it is not possible to

make all the fixings in the brickwork, then the equipment shall be positioned to enable the

upper fixings to be made in the brickwork.

Shot fixing bolts shall not be used.

Any additional scaffolding required will be included within the Contractor’s Scope of Work.

Note: Existing scaffold in place to assist with the Mechanical Pipework Installation may be

used.