method statement for installation of cable trays

8/18/2019 Method Statement for Installation of Cable Trays

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STATE OF KUWAIT

KUWAIT UNIVERSITY

ELECTRICAL METHOD STATEMENT

TENDER NO.KU/KUCP/C0251/10-11

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METHOD STATEMENT FOR INSTALLATION

OF CABLE TRAY/TRUNKING/LADDER

0 Issued for Review & Comments

Rev. Date Description

Eng. A.H

Prepared by

Checked by Approved by


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STATE OF KUWAIT

KUWAIT UNIVERSITY



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REVISION CONTROL SHEET

REV. NO. DATE PAGE NO. DESCRIPTION

0 FIRST ISSUE


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STATE OF KUWAIT

KUWAIT UNIVERSITY



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TABLE OF CONTENTS

1 Purpose…………………………………………………………………………….. 4

2 Scope of Work…………………………………………………………………….. 4

3 Responsible Personnel on Site………………………………………………… 4

4 Storage…………………………………………………………….………………. 4

5 Pre-Installation…………………………………………………………………… 5

6 Instal lat ion………………………………………………………………………… 57 Reference Documents…………………………………………………………. 6

8 Safety……………………………………………………………………………… 6


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STATE OF KUWAIT

KUWAIT UNIVERSITY



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1. Purpose

This method of statement covers the on-site installation of Cable Trays, Trunking &Cable Ladders as defined in the General Specification.

2. Scope of Works

This procedure will define the method to be used to ensure that cable trays, trunking &ladders installations are correct and acceptable and shall conform to the ContractDocuments and Specification.

3. Responsible Personnel on Site

3.1. Construction Manager3.2. Electrical Field Engineers3.3. Safety Officer3.4. QA/QC Engineer3.5. Electrical Supervisors

4. Storage

4.1 Cable Trays, Trunking and Ladders shall be properly supported and stacked on a flatsurface.

4.2 Cable Trays, Trunking and Ladders shall be protected from sunlight and moisture bycovering them with tarpaulin.

4.3 Cable Trays, Trunking and Ladders shall be stacked properly in neat and orderlymanner.

4.4 Cable Trays, Trunking and Ladders shall be stored and stacked in dry area and shall be

properly protected..


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STATE OF KUWAIT

KUWAIT UNIVERSITY



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5. Pre-Installation

5.1 All materials and documentation relevant to this particular Section of works will bechecked by the Construction Department prior to the commencement of works ensuringthat these are correct type as reviewed.

5.2 Before any permanent works will proceed, pre-inspection on all materials, tools andaccess for installation to be carried out.

6. Installation

6.1 Establish the Cable Trays, Trunking and Ladder route on slab soffit and walls, and markwith chalk liner. Ensure that the route conform with the latest coordinated servicesdrawings.

6.2 Mark the locations of supports. For horizontal installation spacing between supportsshall not exceed 1.5m for trunking and 1.2m for cable trays and ladders and not morethan 150mm from all bends and tees. For vertical installation, spacing between supportsshall not exceed 3m for trunking and 1.5m for cable trays and ladders.

6.3 Install the threaded rod and angle bar supports for horizontal installation and uni-strutchannel for vertical supports. Make sure that the supports are properly anchored, rigid

and aligned.

6.4 Install Cable trays, trunking and ladders ensuring that it is properly fixed to its supports.Where necessary to cut the cable trays, the cutting line of the cable trays shall bethrough continuous metal parts and not through the perforation. Burrs and sharp endsshall be removed prior to the installation of tray section or accessories.

6.5 Cable Trays, Trunking and Ladders shall be connected to adjacent lengths, tees, bendsand fittings with approved couplers and securely fastened by mushroom head steelroofing bolts and nuts. Connection shall be mechanically strong so that there is norelative movement between joints.

6.6 Earth links shall be fixed on the adjacent connection of Cable trays, trunking andladders and fittings to maintain the electro-mechanical continuity on the runs of cabletrays, trunking and ladders.

6.7 Where cable tray or cable ladder crosses, expansion joints, adjacent length of cable trayor ladder shall not be joined and shall be bridged only with a flexible earth connector.


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STATE OF KUWAIT

KUWAIT UNIVERSITY



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6.8 A minimum clear space of 25mm shall be kept behind all installed runs of cable trays.Where in a cable trays carrying power cables run in parallel with low current cable trays,a 300mm minimum clear distance shall be kept throughout the installation.

6.9 Raise Request for Inspection for the Cable Trays, Trunking and Ladders Installation.

7. Reference Documents

7.1 Approved Electrical Shop Drawings7.2 Approved Material Submittals7.3 Approved Material Inspection Report7.4 Approved Safety Plan

7.5 Approved QA/QC Inspection & Test Plan.

8. Safety

8.1 All safety precautions shall be followed as per approved safety plan & procedure.Ensure all involved persons are aware of the same.

8.2 Safety Officer to ensure that all working flat forms shall be safe and in goodcondition.

8.3 Tradesman shall ensure that before leaving their working places, it must be clean,

tidy and free from rubbish.

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