This Procedure is applicable to all electrical item installation activities at site, which are to be installed on the [PROJECT TITLE & LOCATION].To ensure that all electrical installation is carried out safely, and in accordance with good working practice, as per [PROJECT TITLE & LOCATION], job specifications. This procedure is intended to provide general application guidance and establish controls during preparation and installation.
Conduit Installation
1 Generally, the installation of conduits below grade should be avoided, except in the buildings where conduit may be installed in concrete floors.
2 If and only if the exception would prevail, herein stated below are some OWNER standards to be applied.
2.1 Below grade conduit should be rigid hot dipped galvanized steel.
2.2 Minimum size for below grade should be 1 inch.
2.3 Reduction on conduit size should be done on above grade.
2.4 Below grade bends should be of the larger radius type.
2.5 Minimum depth for low voltage system conduit installation should be 0.6m below grade and 0.9m below grade for medium voltage systems.
2.6 There should be no more than three 90º bends in a below grade conduit run.
2.7 Below grade conduit should have a red tiles or concrete cover.
2.8 Spare conduit should be provided with pull cords, terminated with plugged couplings and installed flush with finished floor in buildings, or 1 inch above the finished surface in other areas.
2.9 All conduits embedded in concrete should be inspected to assure continuity and correct position before concrete is being poured.
3 For above ground conduit installation, layout first to identify the number of conduits at its end of conduit run by using adequate tie wire as temporary supports. The conduit number should match the number shown on IFC drawings.
2 If and only if the exception would prevail, herein stated below are some OWNER standards to be applied.
2.1 Below grade conduit should be rigid hot dipped galvanized steel.
2.2 Minimum size for below grade should be 1 inch.
2.3 Reduction on conduit size should be done on above grade.
2.4 Below grade bends should be of the larger radius type.
2.5 Minimum depth for low voltage system conduit installation should be 0.6m below grade and 0.9m below grade for medium voltage systems.
2.6 There should be no more than three 90º bends in a below grade conduit run.
2.7 Below grade conduit should have a red tiles or concrete cover.
2.8 Spare conduit should be provided with pull cords, terminated with plugged couplings and installed flush with finished floor in buildings, or 1 inch above the finished surface in other areas.
2.9 All conduits embedded in concrete should be inspected to assure continuity and correct position before concrete is being poured.
3 For above ground conduit installation, layout first to identify the number of conduits at its end of conduit run by using adequate tie wire as temporary supports. The conduit number should match the number shown on IFC drawings.
4 Herein below are notations for conduit routing.
4.1 Conduit runs should be free from any obstruction and unnecessary bending. Where possible conduit runs should be a minimum of 100mm (4 inches) from fireproofed steel and insulated hot fluid lines, or any uninsulated hot object over 150ºC (302ºF).
4.2 Conduit routed on columns or vessels may be supported by ladder supports. Where it is necessary to route the conduit between the ladder and the column or vessel, maintain a minimum of 153mm (6 inches) for the toe space and should be installed at the right side of vertical step ladders.
4.3 If conduits change elevation when entering or leaving the main conduit rack, it should not interfere with piping or block space designated for future use or blocked overhead walkway space. Contractor should provide pull points where shown or required to limit the number of bends in any conduit run in accordance with Articles 346, 347, 348, 350, and 351 of the NEC.
4.4 Conduit should be separated by a minimum of 150mm from piping or equipment with surface temperature in excess of 55ºC.
4.5 Conduit should be parallel or at right angle to walls, columns, beams, etc.
5 Mark the required location of support needed, and the maximum spacing between two supports should be 3000mm. Also, additional support should be provided at bends, fittings and fixtures as required making the conduit rigid and free from vibrations. To be avoided herein, piping is not permitted as a support of conduits.
6 Fabricate and install braces and supports as specified on typical drawings and specifications. Support welded joints should be cleaned and properly primed as per paint system requirements. Welding process should also be in accordance with an approved procedure, and uses qualified welders.
7 Upon fixing above grade conduits on its respective supports and locations, herein below are some OWNER standards.
7.1 Above grade minimum size should be ¾ inch unless otherwise noted.
7.2 Above grade conduit should be rigid copper free aluminum or galvanized.
7.3 All conduits and fittings should have a minimum of 5 threads fully engaged at all connections. Installing threadless conduit fittings on threaded conduits is prohibited.
7.4 All threads should be made with standard conduit-cutting die and should have 19mm (¾ inch) taper per 305mm (12 inches) length. Running threads are not permitted.
7.5 All threaded conduit joints should be coated with an approved electrically conductive sealant and corrosion inhibitor. The compound should be made specially for used with rigid steel conduit and fittings.
7.6 Verify the Rigid Galvanized Steel (RGS), Electrical Metallic Tubing (EMT), & Polyvinylchloride (PVC) according to its specified location and standard requirements, including hold-downs and anchor locations. Electrical metallic tubing (EMT) should be restricted in offices, control rooms and other similar buildings with finished interiors.
7.7 Straight runs of conduit in excess of 150 ft should be provided with an approved expansion fittings.
7.8 Where conduit runs exceeded an equivalent of 45m or more than the equivalent of four 90º bends, expansion joint fittings should be installed. One 90º bend should be considered an equivalent of 15m of straight run conduit.
8 In cutting of conduit pipes, any sharp burrs should be removed using a half round file. After which, fittings or ells & tees if required should be fitted on the conduit as per approved of the area of classification and should be suitable for the environment where to be installed.
9 All empty conduits should be lefted with a nylon pull cord to be installed inside.
4.1 Conduit runs should be free from any obstruction and unnecessary bending. Where possible conduit runs should be a minimum of 100mm (4 inches) from fireproofed steel and insulated hot fluid lines, or any uninsulated hot object over 150ºC (302ºF).
4.2 Conduit routed on columns or vessels may be supported by ladder supports. Where it is necessary to route the conduit between the ladder and the column or vessel, maintain a minimum of 153mm (6 inches) for the toe space and should be installed at the right side of vertical step ladders.
4.3 If conduits change elevation when entering or leaving the main conduit rack, it should not interfere with piping or block space designated for future use or blocked overhead walkway space. Contractor should provide pull points where shown or required to limit the number of bends in any conduit run in accordance with Articles 346, 347, 348, 350, and 351 of the NEC.
4.4 Conduit should be separated by a minimum of 150mm from piping or equipment with surface temperature in excess of 55ºC.
4.5 Conduit should be parallel or at right angle to walls, columns, beams, etc.
5 Mark the required location of support needed, and the maximum spacing between two supports should be 3000mm. Also, additional support should be provided at bends, fittings and fixtures as required making the conduit rigid and free from vibrations. To be avoided herein, piping is not permitted as a support of conduits.
6 Fabricate and install braces and supports as specified on typical drawings and specifications. Support welded joints should be cleaned and properly primed as per paint system requirements. Welding process should also be in accordance with an approved procedure, and uses qualified welders.
7 Upon fixing above grade conduits on its respective supports and locations, herein below are some OWNER standards.
7.1 Above grade minimum size should be ¾ inch unless otherwise noted.
7.2 Above grade conduit should be rigid copper free aluminum or galvanized.
7.3 All conduits and fittings should have a minimum of 5 threads fully engaged at all connections. Installing threadless conduit fittings on threaded conduits is prohibited.
7.4 All threads should be made with standard conduit-cutting die and should have 19mm (¾ inch) taper per 305mm (12 inches) length. Running threads are not permitted.
7.5 All threaded conduit joints should be coated with an approved electrically conductive sealant and corrosion inhibitor. The compound should be made specially for used with rigid steel conduit and fittings.
7.6 Verify the Rigid Galvanized Steel (RGS), Electrical Metallic Tubing (EMT), & Polyvinylchloride (PVC) according to its specified location and standard requirements, including hold-downs and anchor locations. Electrical metallic tubing (EMT) should be restricted in offices, control rooms and other similar buildings with finished interiors.
7.7 Straight runs of conduit in excess of 150 ft should be provided with an approved expansion fittings.
7.8 Where conduit runs exceeded an equivalent of 45m or more than the equivalent of four 90º bends, expansion joint fittings should be installed. One 90º bend should be considered an equivalent of 15m of straight run conduit.
8 In cutting of conduit pipes, any sharp burrs should be removed using a half round file. After which, fittings or ells & tees if required should be fitted on the conduit as per approved of the area of classification and should be suitable for the environment where to be installed.
9 All empty conduits should be lefted with a nylon pull cord to be installed inside.
10 Concrete duct banks and conduit stubs-up should be protected. Open ends plugged, bends free of deformities and hard plastic conduit spacer or rebar spacer should be installed as been required. Spacing of spacer of conduits should be as per IFC drawings and specifications.
11 Conduit run should be completed and cleaned prior to cable pulling. Air blowing of compressed air or by pulling in appropriate size of mandrel through the conduit should be used, or otherwise noted.
12 Functional check-out and testing should be followed after conduit installations. Wait for the result and OWNER specific written instruction. No conduit seals should be poured until OWNER told to do so.
13 Conduit seals should be painted red after pouring with sealing compound, unless otherwise noted.
14 Following completion of installation, submit “Request For Inspection” (RFI) to site QC Section, indicating scheduled time / date for inspection.
Would you like to have a full copy of the native file of the Construction Procedure for All Electrical Works Installations such as;
1. General Requirements
3. Conduit Installation {this article}
8. Electrical Lighting Fixture Installation
9. Aircraft Warning Light Installation
10. Transformer Installation
11. Motor Control Center
12. Switchgear
13. Metal Enclosed Bus Duct
14. Batteries, Battery Chargers, and UPS System
15. Oil Processing and Filing of Power Transformer
9. Aircraft Warning Light Installation
10. Transformer Installation
11. Motor Control Center
12. Switchgear
13. Metal Enclosed Bus Duct
14. Batteries, Battery Chargers, and UPS System
15. Oil Processing and Filing of Power Transformer
Also includes: Applicable Codes & Standards, Responsibilities, Quality Control and Assurance, and Safety & Precautions.
Then, simply just Click the "Download Now" below.
 
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