10/12/2025
Marine wiring. Hi all this is just in from AMSA and is worth your attention.
OFFICIAL
9 December 2025
Dear Accredited Marine Surveyors
We recognise the important role you play in keeping Australia’s DCV fleet safe. This update outlines recent findings and reinforces the standards that support consistent, compliant electrical installations.
AMSA has recently identified several instances where electrical installations on DCVs have been carried out using cabling that does not comply with the prescribed marine electrical standards. Non-compliant wiring poses significant safety risks, not only to vessel operators and passengers, but also to the broader marine environment.
Why Compliance Matters
Electrical systems on DCVs are subject to demanding conditions that are unlike those found in domestic or automotive settings. Constant vibration, saltwater exposure, high humidity, UV radiation, and fluctuating temperatures all place additional stress on cabling and insulation. Using wiring that is not designed or certified for these marine environments can lead to serious hazards, including overheating, insulation breakdown, short circuits, and electrical fires.
To promote safety, Chapters 7 (Low Voltage) and 8 (Extra Low Voltage) of NSCV Part C5B require that a vessel’s electrical system comply with AS/NZS 3004.2 Electrical installations – Marinas and boats, Part 2: Boat installations.
Selecting the Right Cable
Clause 6.1 of AS/NZS 3004.2:2014 sets out the minimum requirements for the selection and installation of cables in marine electrical systems. The standard recognises the need for cables that are robust, moisture-resistant, flame-retardant, and UV stable, with insulation and sheathing capable of withstanding mechanical stress and prolonged exposure to the marine environment.
A close-up of a paper
AI-generated content may be incorrect.
Figure 1 Clause 6.1 AS/NZS 3004.2:2014.
Note: AS/ZNS 3004.2 is current undergoing revision. This was the version in place at the time of writing.
Surveyors must ensure that fixed wiring complies with AS/NZS 5000.1 or AS 60092.350, both of which specify construction and performance requirements to ensure the cable is suitable for marine use.
Cables not designed or tested to these standards, such as automotive grade wiring, household extension leads, or unverified imported products, do not provide the same protection. They may fail to meet the necessary thermal, mechanical, or electrical performance criteria, leading to dangerous outcomes such as arcing, insulation failure, or fire.
If non-compliant cabling is found during inspection or survey, the vessel may be required to be fully rewired using approved marine-grade cable before it can return to service.
Legal Responsibilities and Penalties
Suppliers, builders and installers have a general safety duty under Section 14 of the Marine Safety (Domestic Commercial Vessel) National Law Act 2012, to ensure, so far as is reasonably practicable, that a vessel and its equipment are safe. Surveyors must ensure that the vessel meets the applicable standards under Marine Order 503 – this includes electrical cabling.
Failure to meet this obligation, whether it be the supply or installation of substandard cabling, or lack of verification, may constitute a breach of the National Law. Offences can result in prosecution, substantial fines, or imprisonment, depending on the nature and severity of the breach.
Ensuring Compliance
Compliance with AS/NZS 3004.2 is not optional. It is a critical safety and legal requirement. Surveyors should:
· Inform builders and installers of their general safety duty to use the correct cabling.
· Verify cable markings to confirm compliance with AS/NZS 5000.1, AS 60092.350, or AS/NZS 3004.2.
· Ensure only marine-grade products sourced from reputable suppliers with traceable certification are used.
· Inspect existing installations to identify and replace non-compliant or deteriorated wiring.
· Maintain documentation for electrical work, including cable specifications and supplier details, to demonstrate compliance during audits or surveys.
Key Message
Compliance with AS/NZS 3004.2 ensures that fixed cabling is safe, durable, and suitable for long-term use in marine conditions. Installing compliant wiring is both a regulatory requirement and a professional responsibility, forming part of the general safety duties that underpin safe vessel operation in Australia’s domestic commercial fleet.
If you have any questions about the technical content of this update, please get in touch.
___________________________________________________________________________
For quick access: AMS FORMS I SAGM I NSCV I MO503 I SURVEY FORMS I SURVEY MATTERS
___________________________________________________________________________
This message has been sent to the primary email address recorded for you, which may change depending on your recent interactions with AMSA. If your contact details need updating, please let me know.
Regards
Louise Calis
Advisor Surveyor Accreditation
Vessel Safety Unit | Operations
18 Marcus Clarke Street Canberra ACT 2601
GPO BOX 2181, Canberra ACT 2601
p 02 6279 5870
e [email protected]
e (team) [email protected]
w www.amsa.gov.au
Core Working Hours: 7:00 AM – 3:00 PM AEDT
Reponses outside these hours may be delayed until the next business day.
imageimage
image
If you have received this transmission in error please note that error does not constitute waiver of any confidentiality, privilege or copyright in respect of information in the E-mail or attachments and any use of this material is prohibited. Please notify the sender by return email and delete all copies of this transmission and attachments.
Hi Louis, Received, read and noted.
On Wed, Dec 10, 2025 at 2:37 PM Calis, Louise wrote:
OFFICIAL
9 December 2025
Dear Accredited Marine Surveyors
We recognise the important role you play in keeping Australia’s DCV fleet safe. This update outlines recent findings and reinforces the standards that support consistent, compliant electrical installations.
AMSA has recently identified several instances where electrical installations on DCVs have been carried out using cabling that does not comply with the prescribed marine electrical standards. Non-compliant wiring poses significant safety risks, not only to vessel operators and passengers, but also to the broader marine environment.
Why Compliance Matters
Electrical systems on DCVs are subject to demanding conditions that are unlike those found in domestic or automotive settings. Constant vibration, saltwater exposure, high humidity, UV radiation, and fluctuating temperatures all place additional stress on cabling and insulation. Using wiring that is not designed or certified for these marine environments can lead to serious hazards, including overheating, insulation breakdown, short circuits, and electrical fires.
To promote safety, Chapters 7 (Low Voltage) and 8 (Extra Low Voltage) of NSCV Part C5B require that a vessel’s electrical system comply with AS/NZS 3004.2 Electrical installations – Marinas and boats, Part 2: Boat installations.
Selecting the Right Cable
Clause 6.1 of AS/NZS 3004.2:2014 sets out the minimum requirements for the selection and installation of cables in marine electrical systems. The standard recognises the need for cables that are robust, moisture-resistant, flame-retardant, and UV stable, with insulation and sheathing capable of withstanding mechanical stress and prolonged exposure to the marine environment.
A close-up of a paper
AI-generated content may be incorrect.
Figure 1 Clause 6.1 AS/NZS 3004.2:2014.
Note: AS/ZNS 3004.2 is current undergoing revision. This was the version in place at the time of writing.
Surveyors must ensure that fixed wiring complies with AS/NZS 5000.1 or AS 60092.350, both of which specify construction and performance requirements to ensure the cable is suitable for marine use.
Cables not designed or tested to these standards, such as automotive grade wiring, household extension leads, or unverified imported products, do not provide the same protection. They may fail to meet the necessary thermal, mechanical, or electrical performance criteria, leading to dangerous outcomes such as arcing, insulation failure, or fire.
If non-compliant cabling is found during inspection or survey, the vessel may be required to be fully rewired using approved marine-grade cable before it can return to service.
Legal Responsibilities and Penalties
Suppliers, builders and installers have a general safety duty under Section 14 of the Marine Safety (Domestic Commercial Vessel) National Law Act 2012, to ensure, so far as is reasonably practicable, that a vessel and its equipment are safe. Surveyors must ensure that the vessel meets the applicable standards under Marine Order 503 – this includes electrical cabling.
Failure to meet this obligation, whether it be the supply or installation of substandard cabling, or lack of verification, may constitute a breach of the National Law. Offences can result in prosecution, substantial fines, or imprisonment, depending on the nature and severity of the breach.
Ensuring Compliance
Compliance with AS/NZS 3004.2 is not optional. It is a critical safety and legal requirement. Surveyors should:
· Inform builders and installers of their general safety duty to use the correct cabling.
· Verify cable markings to confirm compliance with AS/NZS 5000.1, AS 60092.350, or AS/NZS 3004.2.
· Ensure only marine-grade products sourced from reputable suppliers with traceable certification are used.
· Inspect existing installations to identify and replace non-compliant or deteriorated wiring.
· Maintain documentation for electrical work, including cable specifications and supplier details, to demonstrate compliance during audits or surveys.
Key Message
Compliance with AS/NZS 3004.2 ensures that fixed cabling is safe, durable, and suitable for long-term use in marine conditions. Installing compliant wiring is both a regulatory requirement and a professional responsibility, forming part of the general safety duties that underpin safe vessel operation in Australia’s domestic commercial fleet.
If you have any questions about the technical content of this update, please get in touch.
___________________________________________________________________________
For quick access: AMS FORMS I SAGM I NSCV I MO503 I SURVEY FORMS I SURVEY MATTERS
___________________________________________________________________________
This message has been sent to the primary email address recorded for you, which may change depending on your recent interactions with AMSA. If your contact details need updating, please let me know.
Regards
Louise Calis
Advisor Surveyor Accreditation
Vessel Safety Unit | Operations
18 Marcus Clarke Street Canberra ACT 2601
GPO BOX 2181, Canberra ACT 2601
p 02 6279 5870
e [email protected]
e (team) [email protected]
w www.amsa.gov.au
Core Working Hours: 7:00 AM – 3:00 PM AEDT
Reponses outside these hours may be delayed until the next business day.
imageimage
image
If you have received this transmission in error please note that error does not constitute waiver of any confidentiality, privilege or copyright in respect of information in the E-mail or attachments and any use of this material is prohibited. Please notify the sender by return email and delete all copies of this transmission and attachments.
--
Regards
David Burn
0468 912 644
Marine Surveyor
AMSA 2656-7583-8
AIMS member no. 943
for Safe Haven marine Centre Pty Ltd
www.safehavenshipwrights.com.au
[email protected]
The Australian Maritime Safety Authority acknowledges the Traditional Custodians of Country throughout Australia and their connections to land, sea and community. We pay our respect to their Elders past and present as well as the continuation of cultural, spiritual and educational practices of all A...
