Electrical Hook up general note for instrument installation

1. Instrument hook up and installation for instrument wiring system shall be accordance with specifications (Instrument design basis & instrument installation specification)
2. The hook up and installation drawings shown in general the required position of the instrument relative to measuring point. The exact location shall be determined at the site with the aid of instrument location drawings
3. All instruments shall be installed in such a way that they are not subjected to
   - Unable to access
   - excessive vibration
   - extreme environment conditions
   - obstruct traffic
   - periodic maintenance of adjacent equipmentbe installed in place which are prone to leakage/dripping
4. Sufficient space shall be left around the instrument for instrument cover removal /withdrawal and for removal protective shades. The minimum clearance between any parts and instrument and surrounding structures or equipment shall not be less than 0.2m to allow insulation, painting, etc
5. Sufficient flexibility shall be provided in instrument cable line to allow thermal expansion the line equipment to which they connect
6. All fabricated work in the field shall be grounded smooth and painted as per project standards. All painting shall be carried out before attachment of instruments, cables, tubing, etc. to the painted materials
7. All instrument cables and wiring shall be identified with the drawings and as detailed in instrument basis. Instrument cable shall be tagged with 316SS tags at walls, penetration and at the end points
8. Wiring to terminal blocks shall not exceed two connections per terminal point
9. A short coil of cable shall be made in field cable at instrument
10. Every wire in every cable including spare wires and drain wires shall be terminated with a company approved insulated ferule, on rail mounted terminal blocks , at both end
11. Each terminal point (including end devices, junction boxes and marshalling strips) shall be made up to include heat shrink insulation over cable and wire shields, end and bare drain wires
12. All cable shields shall be earthed at IER (Instrument Equipment Room) and CCR (Control Center Room) only. Individual shields drain wires for pairs and triad shall be cut, coil and taped at the instrument head
13. All multi core pair and triad overall shields and drain wires shall be insulated green/yellow colored PVC sleeving
14. All metallic components, others than current carrying conductors shall be connected to a common earth system. All unused cable cores shall be earthed at one end only
15. cable runs that penetrate walls (E.G. building walls, blast walls and fire walls) that separate safe area hazardous (classified) shall be provided with vapor tight cable transits fire rated to meet the fire wall requirements