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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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