Engine Compartment Mains Conductors

Looking for advise on cable spec to run through an engine compartment around a MerCruiser.

I'm helping a friend with his 12volts.

What's installed is a 3.7kVA shore supply and feed to submain distribution on very poorly installed unprotected 3 x 2.5mm² Artic Cable.

This just looks wrong to me. What is recommended cable for this Application?
For the time being I want to sleeve it in polyamide, split flexible conduit.

Should this cable not ideally be high temp. tolerant? Petrochemical resistant? Mechanically shielded for intance SWA? or in a conduit?

gctest50

Should be marine mains cable - silvery looking so it doesn't corrode (too quickly! )

It'd be good to move the power hookup to a more sensible place on th hull so it doesn't pass through the engine compartment

Above deck? In conduit or armoured?
[Edit:] Isolation transformer is in the engine compartment. Don't fancy moving that lump.
Any links I can fine nought but American, bog standard flex, ELV or control cable.

Are Irish boats compliant to EU colour coding? Brown, Blue, Green.
What about isolation transformer output colour coding?

Any links for regulations?

fergal.b

This might be of some help to you http://www.dttas.ie/sites/default/files/corporate/foi-decisions/13395-MARINE_NOTICE_NO_58_OF_2011__ELECTRICAL_SYSTEMS_IN_SMALL_CRAFT-1.PDF








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I found this after some digging.

Section 10.2 - Cables



It would seem that ELVDC is <120V on shore and <50V on water?