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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 7 OF 14
Fax: 00 44 (0)1642 616447
www.pidesign.co.uk3.7
Clean Up
During and on completion of installation work the Contractor shall remove all surplus
equipment and material and leave areas in a 'brush clean' condition. Refuse shall be disposed
of as directed by the Engineer.
Prior to testing (where damage could arise) and before offering any part of the installation
for acceptance, the Contractor shall clean out all electrical enclosures and wipe down painted
surfaces. If necessary, damage to paintwork shall be made good by touch-up.
Before finally leaving the site, the Contractor shall remove all his accommodation, plant,
tackle and tools of the trade to the satisfaction of the Engineer.
3.8
Earthing
3.8.1 General Soil Conditions
No information is available.
3.8.2 System Earthing
The neutral shall not be regarded as an earth conductor.
In areas where earth rods are to be driven into the ground, it shall be the contractors
responsibility to ensure that there are no other underground services in the immediate
vicinity.
3.8.3 Equipment Earthing
The main earthing bar as identified in the specific project documentation will be connected
by a separate earth conductor to its main earth point. All non-live metalwork shall be directly
or indirectly bonded to the main earth bar. Such metalworks will include electrical
equipment enclosures, motor frames, tray/ladder rack to be continuously bonded, cable
armouring and glands. All glands which are through clearance holes require an earth tag and
connection to the earth system by 6
sq.mmcable. Care must be taken to ensure that paint,
etc. is cleaned away from under earth connections so that there is good earth continuity.
Direct bonding shall be taken to mean dedicated earth conductors within, or separate from,
plant cable. Separate conductors shall be multi-stranded copper with a green/yellow sheath,
size as specified in the drawings. Indirect bonding shall be taken as earth paths through
armouring.
Note: (Dedicated earth conductors preferred).
However, a combination of both may be employed, providing that the value of the earth loop
impedance allows flow of fault current sufficient to rupture associated protective fuses
within five (5) seconds.