SIRE 2.0 Prep
LoginSign Up Free
Browsing as guest — create a free account to track your progress and unlock all features.
Create Free Account — Track Your Progress
Back to ChaptersChapter 11

Electrical

Electrical systems, safety, and maintenance — 20 questions

EL-01

Walk me through the vessel's lockout/tagout procedure for isolating electrical equipment before maintenance — who applies the locks, who holds the keys, and how is re-energization controlled?

What the inspector looks for
Objective

Electrical Safety Programme — Lockout/tagout isolation procedure

What the Inspector Expects
  • Establishes a documented isolation procedure exists under the SMS per ISM Code Section 7, covering positive isolation, lock application, and permit-to-work linkage
  • Confirms alignment with electrical installation safety principles in IEC 60092 series and SOLAS II-1 Part D regarding safe isolation before work
  • Checks individual (not shared) locks/keys are used so isolation cannot be defeated by one person removing another's lock
  • Verifies a proving-dead step (test-before-touch) is part of the procedure, not just physical lock application
  • Confirms re-energization requires sign-off from the person(s) who applied the isolation, not just the supervising officer
  • Chief Engineer2nd Engineer3rd Engineer
    EL-02

    How does the company's electrical safety policy control live working, and what has to happen before anyone is authorized to work on energized equipment?

    What the inspector looks for
    Objective

    Electrical Safety Programme — Live electrical work control

    EL-03

    Are your electrical crew trained on arc-flash risk, and how is that reflected in the PPE they actually use at the switchboard?

    What the inspector looks for
    Objective

    Electrical Safety Programme — Arc-flash awareness and PPE

    EL-04

    Can you show me the insulated tools and matting provided at the main and emergency switchboards, and how their condition is checked?

    What the inspector looks for
    Objective

    Electrical Safety Programme — Insulated tools and matting

    EL-05

    What records prove insulation resistance testing is carried out on the main circuits and generators at the required intervals, and can you show me how the readings are trended over time?

    What the inspector looks for
    Objective

    Insulation Testing & Switchboard Protection — Insulation resistance testing trend

    EL-06

    Walk me through the main switchboard's physical condition and the servicing/testing history for the air circuit breakers.

    What the inspector looks for
    Objective

    Insulation Testing & Switchboard Protection — Switchboard and ACB servicing

    EL-07

    How do you verify the preferential trip sequence and protection relay settings on the main switchboard are correct and have actually been tested, not just left at the factory defaults?

    What the inspector looks for
    Objective

    Insulation Testing & Switchboard Protection — Preferential trips and settings

    EL-08

    What's the vessel's routine for checking earth fault indication daily, and how do you go about tracing and clearing an earth once one is detected?

    What the inspector looks for
    Objective

    Insulation Testing & Switchboard Protection — Earth fault monitoring and clearing

    EL-09

    Walk me through how you test each generator's AVR, reverse-power (or preferential) trip, and load-sharing performance when running in parallel.

    What the inspector looks for
    Objective

    Generators & Emergency Power — Generator protective function tests

    EL-10

    Can you show me the test records confirming the standby generator auto-starts and picks up the bus automatically on loss of the running generator?

    What the inspector looks for
    Objective

    Generators & Emergency Power — Standby generator auto-start test

    EL-11

    How does the vessel demonstrate that the emergency switchboard picks up automatically on loss of main power, and that emergency lighting and battery-supplied navigation and radio equipment actually work through the full endurance period?

    What the inspector looks for
    Objective

    Generators & Emergency Power — Emergency power and lighting test

    EL-12

    Can you show me the register of certified safe (Ex) electrical equipment in hazardous areas, and how its inspection and maintenance programme is designed to preserve the original certification?

    What the inspector looks for
    Objective

    Hazardous Area Electrical Safety — Ex equipment register and maintenance

    EL-13

    What's the vessel's control over portable electrical equipment taken into hazardous zones — torches, UHF radios, cameras — and how do you confirm only intrinsically safe items actually go there?

    What the inspector looks for
    Objective

    Hazardous Area Electrical Safety — Portable equipment hazardous zone control

    EL-14

    Is the battery room ventilation running continuously, and can you show me how ignition sources are excluded and battery terminals protected?

    What the inspector looks for
    Objective

    Hazardous Area Electrical Safety — Battery room safety controls

    EL-15

    Walk me through how cable condition is checked around the vessel — chafing at supports, any temporary or 'gypsy' wiring, and sealing of cable penetrations through decks and bulkheads.

    What the inspector looks for
    Objective

    Cables, Motors & Accommodation Electrical Safety — Cable condition and temporary wiring

    EL-16

    What does the planned maintenance record show for motor insulation, bearing condition, and ventilation duct cleanliness on the main electric motors?

    What the inspector looks for
    Objective

    Cables, Motors & Accommodation Electrical Safety — Motor maintenance and insulation

    EL-17

    How does the company control personal electrical appliances and laundry equipment brought or used in the accommodation and galley, and what checks confirm they're not creating a fire risk?

    What the inspector looks for
    Objective

    Cables, Motors & Accommodation Electrical Safety — Galley and accommodation appliance control

    EL-18

    Where shore power is used, how does the vessel confirm the connection is made safely — correct voltage/frequency matching, earthing continuity, and isolation before connection or disconnection?

    What the inspector looks for
    Objective

    Auxiliary Systems & Competence — Shore power connection safety

    EL-19

    Is the ICCP or sacrificial anode system's condition being logged, and how do you confirm the navigation light panel will actually alarm the bridge if a light fails?

    What the inspector looks for
    Objective

    Auxiliary Systems & Competence — ICCP and navigation light monitoring

    EL-20

    How do you confirm the ETO or electrical officer is genuinely familiar with this specific vessel's electrical systems — not just holding the certificate, but able to work on this switchboard, these generators, and this Ex equipment?

    What the inspector looks for
    Objective

    Auxiliary Systems & Competence — ETO competence and familiarization

    Chapter 10Chapter 12
    What the Inspector Expects
  • Confirms the SMS states live electrical work is prohibited as a default, permitted only under a specific, senior-authorized exception (e.g., diagnostic testing that cannot be done de-energized)
  • Establishes a dedicated live-work permit exists, separate from the routine isolation permit, specifying justification, PPE, and standby-person requirements
  • Checks the risk assessment for the specific live task addresses shock and arc-flash exposure per IEC 60092 safety principles
  • Verifies authorization sits with the Master/Chief Engineer, not delegated to the individual technician performing the work
  • MasterChief Engineer2nd Engineer
    What the Inspector Expects
  • Establishes crew working on or near switchboards understand arc-flash risk, an established shipboard electrical hazard even without a formal shore-style arc-flash labeling regime
  • Confirms task-specific PPE (face shield/visor, flame-resistant coveralls, insulated gloves) is available and matched to the voltage/fault level of the vessel's electrical system
  • Checks training records or toolbox talks specifically address arc-flash, not just generic electrical safety
  • Verifies crew can explain in their own words why they stand to the side, not directly in front, when operating switchboard breakers
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Confirms dedicated insulated tools (screwdrivers, testers) and rubber matting are provided at switchboard locations per IEC 60092 shipboard electrical safety practice
  • Checks matting is free of cuts, punctures, or contamination that would compromise its insulating value
  • Establishes a periodic visual/test check regime exists for insulating equipment, not a one-time installation
  • Verifies matting and tools are not being used for unrelated purposes (e.g., matting used as a general floor covering elsewhere)
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Establishes a routine megger testing programme exists for generators, motors, and main feeders consistent with manufacturer and class PMS intervals
  • Confirms readings are recorded numerically (not just pass/fail) so a declining trend can be identified before failure
  • Checks corrective action is taken when a reading approaches the minimum acceptable value, rather than waiting for outright failure
  • Verifies test voltage and method used match the equipment rating (e.g., appropriate megger voltage for LV vs equipment insulation class)
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Establishes the main switchboard is free of visible deterioration — discoloration, overheating marks, loose busbar connections, corrosion — consistent with SOLAS II-1 Part D electrical installation standards
  • Confirms ACBs are withdrawn, cleaned, and serviced (contact inspection, mechanism lubrication, closing/tripping function check) at PMS-defined intervals
  • Checks racking-in/out mechanisms operate smoothly and interlocks function correctly to prevent unsafe operation
  • Verifies servicing records identify the specific breaker by generator/feeder, not a generic "switchboard serviced" entry
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Confirms non-essential loads shed in the correct preferential sequence when the switchboard approaches overload, protecting essential services
  • Establishes protection relay settings (overcurrent, short-circuit, undervoltage) match the vessel's approved electrical load study/single-line diagram, not arbitrary values
  • Checks preferential trip testing is carried out at a defined interval and the results are recorded
  • Verifies any change to a protection setting is documented and cross-checked against the approved design, since an unauthorized change can defeat protection coordination
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Establishes earth fault (insulation monitoring) indicators on the main and emergency switchboards are checked and logged daily, consistent with good electrical safety practice under SOLAS II-1 Part D
  • Confirms a defined process exists for tracing a detected earth fault systematically (isolating circuits in sequence) rather than ignoring intermittent alarms
  • Checks that a persistent earth fault is escalated, investigated promptly, and cleared rather than left as a standing condition
  • Verifies the earth fault log shows resolution, not just repeated entries of the same unresolved fault
  • Chief Engineer2nd Engineer3rd Engineer
    What the Inspector Expects
  • Confirms the Automatic Voltage Regulator on each generator maintains stable voltage across load changes, tested periodically rather than assumed functional
  • Establishes reverse-power (or preferential) trip protection is tested to confirm a generator motoring on the bus is detected and tripped before damage occurs
  • Checks load-sharing between paralleled generators is verified as balanced (kW and kVAr) under test, not just observed to "look okay" on the panel meters
  • Verifies test results and any corrective adjustment are recorded, cross-referenced to the PMS
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Establishes the standby generator is tested to auto-start and close onto the bus within the required time following blackout, not just manually started for routine running hours
  • Confirms the test simulates an actual loss-of-power event (e.g., tripping the running generator) rather than only a "start and stop" exercise
  • Checks the time from blackout to restored power is recorded and consistent with the vessel's approved arrangement
  • Verifies failure-to-start scenarios (batteries, air start pressure) are also periodically checked as part of readiness
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Confirms the emergency source of electrical power (emergency generator or accumulator battery) automatically supplies the emergency switchboard within the time required under SOLAS II-1 Part D emergency power provisions following loss of the main source
  • Establishes emergency lighting throughout escape routes, muster stations, and machinery spaces is tested and functional, not just spot-checked at a few fixtures
  • Checks the transitional/emergency battery source bridges the gap before the emergency generator picks up, and that batteries hold charge for their rated duration
  • Verifies navigation lights, radio installations, and other services required to run from the emergency source are confirmed to actually transfer during the test, not just assumed from a single-line diagram
  • Chief Engineer2nd Engineer3rd Engineer
    What the Inspector Expects
  • Confirms a complete register exists listing every item of Ex-certified equipment in hazardous zones with its protection type (Ex d flameproof, Ex e increased safety, Ex i intrinsic safety) per IEC 60079 series principles
  • Establishes the inspection/maintenance programme follows IEC 60079-17 principles — checking enclosure integrity, gasket condition, flamepath surfaces, and gland tightness — without which certification is invalidated
  • Checks that no unauthorized modification, substitution of components, or non-certified replacement parts has occurred, since any such change voids the equipment's certification
  • Verifies cable glands on Ex enclosures are the correct certified type, fully tightened, and free of missing seals or unused entries left open
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Establishes only intrinsically safe (Ex i) certified torches, UHF/portable radios, and similar devices are authorized for use in cargo hazardous areas, consistent with IEC 60079-11 principles and ISGOTT ignition-source control guidance
  • Confirms a physical control point (e.g., issue from a controlled locker, sign-out log) prevents non-IS equipment from being carried into the zone
  • Checks IS equipment is inspected for damaged casings or batteries that could compromise its intrinsic safety rating before each use
  • Verifies personal mobile phones and cameras are subject to a clear onboard policy restricting their presence on deck during cargo operations, not left to individual discretion
  • Chief OfficerBosunPumpman
    What the Inspector Expects
  • Confirms battery room ventilation is adequate and continuous (natural or mechanical, per the installation's design) to prevent hydrogen gas accumulation from lead-acid or nickel-cadmium batteries
  • Establishes no ignition sources — unprotected light fittings, switches, or unauthorized electrical equipment — are present inside the battery room, consistent with SOLAS II-1 Part D electrical safety principles
  • Checks battery terminals are covered/insulated to prevent accidental short-circuiting, and that non-conductive tools are used for battery servicing
  • Verifies acid-resistant flooring/spill trays and neutralizing materials are provided and battery topping-up practice avoids spillage
  • Chief Engineer2nd Engineer3rd Engineer
    What the Inspector Expects
  • Establishes a routine visual inspection regime covers cable runs for chafing, damaged sheathing, or inadequate support/cleating consistent with IEC 60092 installation standards
  • Confirms the vessel has a firm, enforced prohibition on temporary or improvised ('gypsy') wiring bypassing proper cable installation practice
  • Checks cable penetrations through watertight/fire-rated decks and bulkheads remain properly sealed with the correct transit/gland arrangement, preserving structural fire and watertight integrity
  • Verifies any temporary cable run found in use (e.g., for portable equipment) is itself properly supported, protected, and removed promptly after the job
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Confirms insulation resistance testing is included as part of routine motor maintenance, not only tested when a fault is suspected
  • Establishes bearing condition is monitored (vibration, temperature, lubrication) at PMS-defined intervals appropriate to the motor's duty
  • Checks motor ventilation ducts/screens are kept clear of dust, lint, or debris that would cause overheating, particularly on totally enclosed fan-cooled motors
  • Verifies any motor found running hot or noisy has a corresponding work order and follow-up, rather than being left running under observation indefinitely
  • Chief Engineer2nd Engineer3rd Engineer
    What the Inspector Expects
  • Establishes an SMS policy exists governing personal electrical appliances (kettles, heaters, chargers) permitted in cabins, including any visual/electrical safety check before use
  • Confirms galley equipment and laundry machines are on a maintenance routine addressing overheating, worn flex/plugs, and correct fusing
  • Checks unauthorized high-current personal appliances (e.g., improvised immersion heaters) are actively identified and removed, not just prohibited on paper
  • Verifies laundry equipment ventilation/lint management is addressed given its fire-risk profile in accommodation spaces
  • Chief OfficerMasterall crew
    What the Inspector Expects
  • Establishes a documented procedure exists for connecting to shore power, including verification that shore supply voltage, frequency, and phase rotation match the vessel's requirements before closing onto the ship's system
  • Confirms the ship's main switchboard is isolated/interlocked appropriately so shore power and the ship's generators cannot be paralleled unintentionally
  • Checks earthing continuity between ship and shore is verified as part of the connection procedure, consistent with IEC 60092 principles on electrical safety
  • Verifies the shore connection cable and connector are inspected for damage before each use and that connection/disconnection is only performed with the circuit de-energized
  • Chief Engineer2nd EngineerETO
    What the Inspector Expects
  • Confirms the impressed current cathodic protection (ICCP) system's output current/voltage is logged periodically, or sacrificial anode condition is assessed at drydock, as part of hull corrosion protection
  • Establishes the navigation light panel's failure-alarm function is tested to confirm the bridge is actually alerted if a required navigation light fails
  • Checks spare navigation light lamps/fittings are held onboard and readily accessible for prompt replacement
  • Verifies ICCP anode/reference cell readings are within the system's designed operating range, with any anomaly investigated
  • Chief Officer2nd OfficerChief Engineer
    What the Inspector Expects
  • Establishes the ETO/electrical officer holds valid STCW certification appropriate to the role (where the flag/company requires a dedicated ETO certificate) per STCW Code Table A-III/6
  • Confirms a vessel-specific familiarization was completed covering the actual switchboard type, protection relays, generator control system, and Ex equipment fitted, not a generic company induction
  • Checks the ETO can demonstrate practical knowledge in interview — e.g., explaining the preferential trip sequence or where the Ex equipment register is kept — rather than reciting from a manual
  • Verifies handover records exist between outgoing and incoming ETO/electrical officers covering open electrical defects and ongoing work
  • ETOChief EngineerMaster