Rated RED. The board can house the new LED works. Field condition records non-compliant working-space clearance.
| GPS (lat, long) | -37.678367, 144.848148 |
| Zone / apron | To be confirmed against apron key-plan |
| Upstream source (parent DB / sub) | To be confirmed against airfield reticulation drawings |
| Inspected | 21–22 June 2026 |
As-built supply and cabling recorded on site. Visual / physical condition audit only — no electrical testing performed.
| Incoming supply & earthing | |
|---|---|
| Supplied from | DB Gate 28 |
| Upstream CB way(s) | 14 |
| Phases | 3-phase |
| Line voltage | 400 V (L-L) |
| Phase-earth voltage | 230 V (L-N) |
| Earthing system | Reticulated |
| Upstream protection | Isolator only (no OCPD confirmed at board) |
| Supply cable schedule | |
|---|---|
| Active conductor size | 16 mm² |
| Configuration | 1x4C |
| Conductor arrangement | circular |
| Parallel sets | 1 |
| Conductor material | Copper |
| Insulation / type | XLPE |
| Armour | Unarmoured |
| Installation method | Underground Enclosure |
| Conduit | 100 mm |
| Loaded circuits in conduit | — |
| Estimated depth | — |
| Earth arrangement | Separate — 16 mm² |
| Approx. length | Not recorded |
Scored per the Condition Scoring & Rating Model (six standards-referenced dimensions, 0–4 on the P-scale). Rating is gated — a single safety/structural P2 breach sets RED regardless of the averaged Index.
| Dimension | Score | Grade | Observation |
|---|---|---|---|
| Electrical safety & compliance | 0 | None observed | None observed |
| Structural & enclosure integrity | 2 | Moderate (P3) | Enclosure & chassis mechanical integrity |
| Corrosion & protective coating | 1 | Minor (P4) | Corrosion of fixings, bars and coatings; general fouling |
| Ingress protection | 0 | None observed | None observed |
| Access & working space | 3 | Major / safety (P2) | Door opening arc and working-space clearance |
| Thermal / fire & component | 0 | None observed | None observed |
Field-observed defect(s) for this board, itemised into discrete findings — each with its own priority and category.
| Ref | Category | Defect | Pri |
|---|---|---|---|
| D-01 | Clearance | Non-compliant door / working-space clearance | P2 |
| D-02 | Structural | Previous structural repairs noted | P3 |
| D-03 | Corrosion | Minor surface rust to fixings and bars | P4 |
The new LED floodlight load and driver footprint are materially smaller than the legacy HID gear removed, and the existing 3-phase supply, 16 mm² feed and cabinet isolation are adequate for the new works. This conclusion is universal across the fleet and is independent of condition.
6 site photographs. Frames outlined in orange are keyed to a priority defect (fire, structural, access or ingress evidence).