Electrical Work Procedure

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ELECTRICAL WORK PROCEDURE

TABLE OF CONTENTS

1.0 PURPOSE

2.0 SCOPE

3.0 REFERENCE

4.0 DEFINITIONS

5.0 RESPONSIBILITIES

6.0 PROCEDURE

7.0 ELECTRICAL EQUIPMENT INSTALLATIONS

8.0 ATTACHMENTS: TEST


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1.0 PURPOSE

The purpose of this document is to ensure safe, high quality and

consistent installation of the electrical system at the Escravos

Produced Water Disposal facility.

2.0 SCOPE

This Electrical work procedure covers all onshore electrical

construction activities, Installation, inspection and testing of electrical

system on Main deck, Cellar deck, Jacket and Bridge of the Escravos

Produced Water Disposal facility. The overviews of work are as follows:

Unboxing and Sorting of Lighting Accessories

Cable drum testing

Fabrication and Installation of Cable Tray Supports

Fabrication and Installation of Cable Tray

Earth Bonding

Junction Box Installation

Bridge Conduit Installation and Wiring

Fabrication and Installation of Stanchion / Pendant Light support

Installation of Plant Lighting Systems

Transformers Installation and Termination

Electric Motors Installation and Termination

MV, LV Power and Control Cable Pulling

Cable Glanding and Termination

Cable Tagging and Core Identification

Testing (Meggering and Continuity)

Mechanical Completion Checks


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3.0 REFERENCE

All construction work, installation and testing shall be carried out in

accordance with good engineering practice and shall satisfy all

statutory requirements of the National and/or local authorities in which

the installations will be located.

The following Standards and requirements shall form an integral part of

the electrical construction work, Installation, inspection and testing in

the Escravos Produced Water Disposal facility:

PWD-D017-ELE-DTL- Electrical Installation Details

NET-000-90005 (Power & Control) Offshore

API RP 14F Recommended Practice for Design and

Installation of Electrical System for Offshore

Production Platforms

ASTM A123 Specification for Zinc (Hot- Galvanized)

Coating

on Product Fabricated from Rolled,

Pressed, and Forged Steel Shaped Plates,

Bars, and Strip

ASTM A386 Specification for Zinc-Coating (Hot-Dip) on

Assembled Steel Products

IEEE 45 Recommended Practice for Electric

Installation

on Shipboard

NPFA National Electrical Code 70

NPFA Lightning Protection Code 78


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4.0 DEFINITION

NONE


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5.0 RESPONSIBILITIES

! Electrical Team Lead

Shall ensure proper implementation of this procedure. He shall

coordinate the activities of the Electrical Engineer who leads the

Electrical team.

! Electrical Engineer

The Electrical Engineer shall be responsible for the following:

Verifying all activities relevant to installation and testing of field

mounted Equipment and Lighting accessories.

Verifying the availability of the materials required for installation.

Preparation and submission of as-built drawings and resolving

all technical problems that may arise during installation

activities. He is also responsible for coordinating with the QA /

QC Engineer for resolving technical queries.

! Electrical Supervisor

Shall lead the Electrical activities at construction stage; carry out all

inspection required; issue the relevant report or checklist and

coordinate with the QA / QC Inspector and the Electrical Engineer.

! Quality Control Inspector

Shall monitor the proper implementation of the project procedures and

specifications. Shall also be responsible for conducting of tests on

cables and instruments during delivery and before installation;

responsible for all final inspection activities; rectify all punch list items

and sign off all finished works.

! Electrical Technician

Electrical Technicians shall be responsible for Installing all Electrical

equipment and lighting. Coordinating with the Electrical Supervisor,

QA/QC Engineer and Electrical Engineer in electrical installation and in

resolving technical issues.


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6.0 PROCEDURE

6.1 Receiving and Inspection of Electrical Equipment / Material

Upon receipt of electrical materials the QC Inspector and

warehouse personnel shall inspect visually the materials and

equipment for possible defects, physical damages or missing

part.

The conformance of the electrical equipment to specifications,

hazardous area classification and mechanical certification shall

be verified.

The provision in the following documents shall form the basis for

all the inspection required.

Quality Assurance/Quality Control

Inspection and Test Plan

Manufacturers data and technical manuals

Electrical equipment shall be visually inspected for possible

damage and defects during handling and shipment.

However, for MV / LV Switchgear panels in the MCC, high

voltage test on the panel should have been carried out as part of

the manufacturers scope in accordance with the relevant CNLs

or international Standards; all relevant documents duly signed.

6.2 Pre-Installation Test and Inspection

Tests shall be carried out on cables and wires at delivery and

before installation and the QC inspector shall perform these test.

6.2.1 Test on Cables

The order of test shall be

Insulation Resistance Test for

" Low Voltage Power Cable (LV)

" Low Voltage Control Cable (LV)

" Medium Voltage Cable (MV)

Continuity Test for

" Low Voltage Power Cable (LV)

" Low Voltage Control Cable (LV)

Medium Voltage Test for Medium Voltage Cable (HV)


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Test equipment to be used are as follows

Megger Tester 1000V or 5000V

Fluke Multi-tester

Hi-Pot Tester6.3 Electrical Equipment Storage and Preservation

Material storage shall comply with the material Control

Procedure provided for this project.

6.3.1 The Electrical equipment shall be stored where appropriate in

accordance with vendor advice.

On receiving the motors, it shall be stored in a dry and clean

shelter position, which is free from vibration and rapid change in

temperature.

The motor shall be covered completely with tarpaulins to prevent

ingress of dust or moisture until such a time installation is

complete.

Where the motor is fitted with anti-condensation heater. With the

client approval, a suitable power supply shall be made available;

the heater shall be switched on throughout the storage period,

particularly where the storage period is likely to be prolonged.

Warning notice shall be attached to this effect.

6.4 Calibration

All test equipment shall be calibrated in accordance with

calibration control procedure and shall be traceable to the

applicable standards.

7.0 ELECTRICAL EQUIPMENT INSTALLATION

7.1 Cable tray Supports Fabrication and Installation

Structural welders shall carry out fabrication of cable tray

support.

These Cable tray supports shall be installed on horizontal

base plate unless otherwise field adjustments are required.

The cable tray supports shall be fastened with bolts and nuts

and angular iron for bracing wherever possible for


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reinforcement.

Cable tray support shall provide strength and safe working

capacity (SWL) sufficient to meet the load requirement of the

cables to be laid on top cable trays. The cable tray support material shall agree with the EPWD

project specification.

Special consideration will be given to center-supported

systems considering eccentric loading.

7.2 Paint Touch-up for Cable Tray Support

Paint touch-up for cable tray support shall be done with zinc-

rich galvanizing materials that meet the required

specification.

Cable trays that have a Hot-dip galvanized coating shall be

re-touched after fabrication i.e. after cutting and drilling since

the coating gets damaged over time.

Other protective coatings that are cut or damaged must be

touched up with compatible coatings.

7.3 Cable Trays Installation

Cable tray shall be installed in conformance with NEC A318

and standards set forth in NEMA VE-1 and VE-2 as well that

provided by the project (PWD-D017-ELE-DTL- NET-000-

90005 Electrical Installation Details (Power & Control)

Offshore

Consideration shall be given to loads associated with future

cable additions or any other loads to the cable tray system or

cable tray support system.

Cable tray cut section shall be treated to remove sharp

edges, which could cause damage to cables and cause

injury to personnel.

Insulation separators and insulated fitting materials shall be

used to prevent contact corrosion due to the use of SS-316

in combination with steel supports.

Cable tray hardware (nuts, bolts and washers..) to be used


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during the installation shall be of 316 stainless steel

materials.

Where cable trays are linked together, splice plate

connectors/hinges shall be used to bolt them and cable trayshall be grounded according to EPWD Grounding

specification.

The linking points shall be bonded together using a

dedicated bond wires, and bonding wires shall have a good

surface contacts.

Competent and qualified persons familiar with standards

electrical construction practices, electrical equipment shall

perform the work.

7.4 Cable Pulling.

Prior to cable installation, cable path shall be examined to

ensure that all areas are free of hazards that may cause

damage during cable installation.

All cables shall be pulled from the top of the drum and in the

direction indicated on the drum according to vendors

recommendation.

Sufficient cables rollers and side roller (when required) shall

be used when pulling cable in position. This will reduce the

effort required and ensure the cable outer sheath is not

damaged.

The minimum bending radius of the cable shall be

maintained to prevent damage to the cable

After pulling of cables, temporary identification tags shall be

attached. Permanent tags shall be attached at the end of

termination activities.

Correct power and control cable size and type shall be

pulled.

After pulling, the cable end shall be sealed to prevent

moisture ingress


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7.5 Cable Glanding

Proper sizes of cable gland suitable for the cable shall be

used to match the appropriate cable.

Any unused cable entry hole shall be plugged. While glanding power cables, it shall be ensured that the

loads of the cables are not coming on the glands.

Close attention shall be paid to the cable glanding and

sealing arrangements on all electrical equipment.

7.6 Cable Termination

Termination (wiring connection) shall be done as per

specification, wiring drawings and/or manufacturers

instruction.

Core shall be terminated with pin crimps or cable lugs. These

shall be installed with crimping / compression tools and shall

be tightened to manufacturers recommended torques.

Each lug shall correctly match the cross-sectional area of the

conductor and shall be crimped on with the correct

compression tools and dies.

Power cables and control cables shall be anchored to the

cable tray by using cable ties (tie wraps).

Sufficient length of cable for connection shall be coiled near

the equipment side.

Certified HV/MV jointer shall perform all MV cable

termination and joints where required.

7.7 Cable Tagging and Core Identification

Each cable shall be correctly tagged as per project

specification and standards for suitable identification.

Identification numbers for power and control cables shall

read from terminals outwards

Identification shall be in the form of captive o ring ferrule of

appropriate diameter engraved or indelibly printed with the

cable number, the core number and the terminal number.

Wire maker shall be provided for cable wires/cores for power


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cables and control cables.

7.8 Grounding System

All metallic enclosures of equipment, cable trays, cable tray

structural supports, vessels, skids, structural steel supports etc.

as found in bridge, main deck, cellar deck and jacket shall be

grounded by connection to the common Earth Grid. The

Earthing System / Pattern shall be in accordance with the

approved drawings. All Earthing cables shall be PVC covered.

7.9 Electric Motor

Electric motors shall be erected or installed in full accordance

with the manufacturer instructions and project specification with

regards to foundation, alignment, shimming etc. Before

electrical hook-up of the electric motor, the Electrical Equipment

Field Inspection report form shall be filled, signed and duly

approved by all relevant parties. The terminations shall be in

correct Phase-Sequence arrangement and marked L1, L2 & L3

at each end.

The metal casing of the electric motors shall be earthed using

the specified wire size according to project spec.


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8.0 ATTACHMENTS

Basic Inspection (Electrical Equipment)

Cable Installation Check Procedure Cable Tray/Ladder Inspection

Electrical Installation Checklist

Lighting Circuit Insulation Resistance Test

Lighting Installation Check Procedure


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Documents

Electrical Work Procedure