Marine electrical installation process map

What is in this map

14 steps across 5 swimlanes and 5 phases, with 2 decision points.

Swimlanes (who does the work)

ServiceDesk, Engineering, Field Electrical, QA / Inspection and Project Manager

Phases (left to right)

Scope & Engineering, Verification & Preparation, Installation, Inspection & Testing and Documentation & Handover

Why map this process

Most installation write-ups describe what gets built, not what gets checked before it does. This one puts the materials-verification gate and the post-install inspection on the same page as the work itself, so a reader can see that neither is optional: a mismatch between what's on the truck and what the drawings specify is a defined branch back to sourcing, not a note left for someone to catch later, and a failed inspection is a defined branch back to correction, not a conversation that happens off the page.

The map also draws its own boundary honestly. Row one's note routes a customer with no scope yet to the Turnkey Marine Electrical Project SOP instead, and the install row itself hands off any high-voltage or ATEX/EEx-certified work to the SOPs that govern those specifically. A map that pretended to cover everything would be less useful than one that says exactly where it stops and what picks up next.

Every step in the map

This is the spreadsheet behind the diagram. The numbers in “Goes to” are row numbers, which is exactly what the editor’s “Line to” column holds — so you can read the flow here and retype any part of it.

The decision points

Every branch in the map, with the label on each outgoing line. These are the questions the process has to be able to answer.

• 4. Materials and equipment match **specification?**

  Owned by Field Electrical · Verification & Preparation

  • Yes → step 6
  • No → step 5

• 9. Installation passes inspection?

  Owned by QA / Inspection · Inspection & Testing

  • Pass → step 11
  • Fail → step 10

Notes on specific steps

These notes travel with the map. In the editor they live in the Notes column and appear when you open a box.

1. Project scope received

A defined scope of electrical work the customer has already ordered, for a vessel or an onshore/offshore site. This SOP starts once that scope exists; a customer who has not yet scoped anything, and wants Scanel to own requirements through closeout, is the Turnkey Marine Electrical Project SOP instead.

2. Engineering review of scope and installation drawings

Checked against the drawings, wiring plans and equipment specification the job was ordered against. If those documents don't exist yet or need changing, that work happens in the Electrical Engineering & Design Change SOP before this row, not inside it.

5. Flag **discrepancy**, source correct materials or equipment

Typical discrepancies: wrong cable rating or gland size, a substituted connector, a missing manufacturer certificate, or a delivered quantity short of what the drawings call for. Loops back to re-verify once the correct item is on site, rather than installing against a substitution nobody signed off.

7. Install cabling, panels and equipment per drawings

The hands-on core of this SOP: routing and terminating to the reviewed drawings, not to whatever's fastest on the day. Work that turns out to involve a high-voltage system or EEx-certified equipment branches to the High-Voltage Electrical Work SOP or the ATEX / EEx Equipment Service SOP for the parts those rules govern.

8. Inspect installation for workmanship and compliance

A workmanship and as-drawn check: terminations, support intervals, labeling and IP ratings against the reviewed drawings. This is an internal QA sign-off that the install was done correctly, not the pre-energization safety inspection that Electrical System Commissioning SOP runs later, closer to power-up.

11. Perform *de-energized* verification checks: torque, labeling, phase sequence and physical security

Mechanical and visual checks only, done before the system is ever powered: terminal torque, cable and panel labeling, phase sequence marking, and that guards and enclosures are secured. Continuity, insulation-resistance testing and energization itself are the next SOP's gate, not this one's.

13. Hand over installation to customer for commissioning

Feeds directly into Electrical System Commissioning SOP, which starts once Scanel considers the installation complete and ready to be proven out and energized.

Making it yours

The five phases (Scope & Engineering, Verification & Preparation, Installation, Inspection & Testing, Documentation & Handover) sit in the Horizontal lane column, and the five roles (ServiceDesk, Engineering, Field Electrical, QA/Inspection, Project Manager) sit in the Vertical lane column. When you adapt it, start with the materials-match decision near the front: change its two branches in the Line text column to match your own procurement escalation rather than deleting the loop, because 'flag discrepancy, source correct materials' is the row that keeps a wrong cable gauge from getting installed anyway under schedule pressure.

What to watch out for

• Don't merge the workmanship inspection with the later de-energized verification. One checks that the install matches the drawings (terminations, support intervals, labeling); the other is a set of mechanical and visual checks done before the system is ever powered (torque, phase sequence, physical security). Energization testing itself belongs to the next SOP, not this one — folding all three into one row hides which check actually caught a problem.
• Keep the 'materials match specification' decision even if your supplier is reliable. It's the row that produces a paper trail when a delivered item is a substitution nobody signed off, and without it a wrong-gauge cable gets installed on the strength of 'it looked close enough.'
• The handover row is a real handoff to the commissioning SOP, not a formality. If your version skips straight from documentation to 'done,' the next crew has no signal that installation is what's actually complete versus commissioned and energized — which matters the day someone asks whether a vessel is safe to power up.

Frequently asked questions